MTB Tech Rumors and Innovation

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DServy
Posts
260
Joined
5/28/2015
Location
Jackson, WY, USA
2/9/2025 11:52am
Etney wrote:
A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.Ben Hildred is doing his climbing...

A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.

Ben Hildred is doing his climbing challenge, where he climbs 10k feet a day, for 100 days, and I spotted him covering up the caliper on his latest story - Strange, because I thought he just ran regular Level Ultimate Stealth's - But went through his old stories from these past climbs, and managed to spot two pics of a caliper, that size-wise looks like a level, but it differs in shape. It also seems to say "Prototype" when you zoom in on phone. Pic quality here doesnt really translate though.

This challenge is probably a very good test for most of the components on his bike, so no wonder sram wants to torture test some brakes. He's also running the yet to be released new axs dropper. 

 

From his story today

476378870 1183461489983538 398119426725913942 n

Managed to see a pic with a text that looks to say "prototype" - You can also see that the side of the caliper is flat, compared to the current level brake which has a "ridge" in the side (see pic at bottom)
475970799 643709258156092 2987493753364364513 n.jpg?VersionId=hYmJR.FkgVnQ0lDNVX4b

"SRAM" seems to be etched/laser engraved on top of the caliper

476348076 2286507415077362 9139535672293089080 n

 

Current level ultimate caliper
09d48dd9e931bdecb1f0af694b78ac37.jpg?VersionId=funDACagldc F V.3T

SRAM is releasing a bunch of mineral oil brakes. In part because DOT is terrible, and in part because of EU regulations around DOT fluid.

5
1
2/9/2025 11:59am
Etney wrote:
A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.Ben Hildred is doing his climbing...

A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.

Ben Hildred is doing his climbing challenge, where he climbs 10k feet a day, for 100 days, and I spotted him covering up the caliper on his latest story - Strange, because I thought he just ran regular Level Ultimate Stealth's - But went through his old stories from these past climbs, and managed to spot two pics of a caliper, that size-wise looks like a level, but it differs in shape. It also seems to say "Prototype" when you zoom in on phone. Pic quality here doesnt really translate though.

This challenge is probably a very good test for most of the components on his bike, so no wonder sram wants to torture test some brakes. He's also running the yet to be released new axs dropper. 

 

From his story today

476378870 1183461489983538 398119426725913942 n

Managed to see a pic with a text that looks to say "prototype" - You can also see that the side of the caliper is flat, compared to the current level brake which has a "ridge" in the side (see pic at bottom)
475970799 643709258156092 2987493753364364513 n.jpg?VersionId=hYmJR.FkgVnQ0lDNVX4b

"SRAM" seems to be etched/laser engraved on top of the caliper

476348076 2286507415077362 9139535672293089080 n

 

Current level ultimate caliper
09d48dd9e931bdecb1f0af694b78ac37.jpg?VersionId=funDACagldc F V.3T

DServy wrote:

SRAM is releasing a bunch of mineral oil brakes. In part because DOT is terrible, and in part because of EU regulations around DOT fluid.

If I search DOT fluid EU regulations, safety sheets come up, could you link me something to point me in the right direction please?

DServy
Posts
260
Joined
5/28/2015
Location
Jackson, WY, USA
2/9/2025 12:05pm
Etney wrote:
A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.Ben Hildred is doing his climbing...

A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.

Ben Hildred is doing his climbing challenge, where he climbs 10k feet a day, for 100 days, and I spotted him covering up the caliper on his latest story - Strange, because I thought he just ran regular Level Ultimate Stealth's - But went through his old stories from these past climbs, and managed to spot two pics of a caliper, that size-wise looks like a level, but it differs in shape. It also seems to say "Prototype" when you zoom in on phone. Pic quality here doesnt really translate though.

This challenge is probably a very good test for most of the components on his bike, so no wonder sram wants to torture test some brakes. He's also running the yet to be released new axs dropper. 

 

From his story today

476378870 1183461489983538 398119426725913942 n

Managed to see a pic with a text that looks to say "prototype" - You can also see that the side of the caliper is flat, compared to the current level brake which has a "ridge" in the side (see pic at bottom)
475970799 643709258156092 2987493753364364513 n.jpg?VersionId=hYmJR.FkgVnQ0lDNVX4b

"SRAM" seems to be etched/laser engraved on top of the caliper

476348076 2286507415077362 9139535672293089080 n

 

Current level ultimate caliper
09d48dd9e931bdecb1f0af694b78ac37.jpg?VersionId=funDACagldc F V.3T

DServy wrote:

SRAM is releasing a bunch of mineral oil brakes. In part because DOT is terrible, and in part because of EU regulations around DOT fluid.

If I search DOT fluid EU regulations, safety sheets come up, could you link me something to point me in the right direction please?

Discussed here:
https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516

Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about it on this thread before. 

I'm just repeating what's been said before on the EU front, however I do know there are a couple bike releases dependent on SRAM introducing their new brakes first. 

3
2/9/2025 12:32pm
DServy wrote:

SRAM is releasing a bunch of mineral oil brakes. In part because DOT is terrible, and in part because of EU regulations around DOT fluid.

If I search DOT fluid EU regulations, safety sheets come up, could you link me something to point me in the right direction please?

DServy wrote:
Discussed here:https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about...

Discussed here:
https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516

Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about it on this thread before. 

I'm just repeating what's been said before on the EU front, however I do know there are a couple bike releases dependent on SRAM introducing their new brakes first. 

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading one evil for another. It appears that the EU and other places are looking to impose more restrictions on DOT fluid to reduce the number of harmful chemicals used, but not explicitly saying that mineral oil is better alternative. 

It wouldn't surprise me if its purely a cost thing - that lack of regulation means brake companies can put what ever discount baby oil in their brakes they feel like and it doesn't need to meet any standards. 

9
3
2/9/2025 1:31pm

If I search DOT fluid EU regulations, safety sheets come up, could you link me something to point me in the right direction please?

DServy wrote:
Discussed here:https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about...

Discussed here:
https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516

Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about it on this thread before. 

I'm just repeating what's been said before on the EU front, however I do know there are a couple bike releases dependent on SRAM introducing their new brakes first. 

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading...

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading one evil for another. It appears that the EU and other places are looking to impose more restrictions on DOT fluid to reduce the number of harmful chemicals used, but not explicitly saying that mineral oil is better alternative. 

It wouldn't surprise me if its purely a cost thing - that lack of regulation means brake companies can put what ever discount baby oil in their brakes they feel like and it doesn't need to meet any standards. 

I'm guessing it's probably more down to the fact that DOT is a fair bit nastier on terms of corrosiveness and toxicity, no? 

10
1
Roryb
Posts
13
Joined
11/13/2024
Location
Vancouver, BC, CA
2/9/2025 3:05pm
Roryb wrote:
Yes, we use mass dampers to control wind accelerations in skyscrapers.  They are basic shake weights suspended on springs. Slosh tanks are often used too. These...

Yes, we use mass dampers to control wind accelerations in skyscrapers.  They are basic shake weights suspended on springs. Slosh tanks are often used too. These are purely for occupancy comfort. 

They can be used for strength design but then they need to be active dampers to react to all frequencies. 

Because if this, they are rarely used for strength design and almost never used in seismic design (as no one knows what frequency earthquake the building will actually see). 

These shake weights will improve hand comfort but at the cost of bike playfulness. 

juliusk wrote:
I can tell you the countershox doesn‘t make my bike any less „playful“. I mean if you want a freeride/big jumps or light trail/xc bike you...

I can tell you the countershox doesn‘t make my bike any less „playful“. I mean if you want a freeride/big jumps or light trail/xc bike you probably wouldn‘t put it on in the first place. 

Besides the actual weight I don‘t notice any different or weird feeling when jumping or trying to move the bike around fast. Whereas the added stability and comfort are huge. 

The weight on your headtube is very noticeable though when pulling up the front wheel?

I swap between a Dorado and a 180mm mezzer on the same bike.

The weight difference is about 1kg. 

The Dorado is way smoother and eats the rough better at the cost of front end weight which is quite noticeable. 

I assume the same would be true with a shake weight?

5
1
Carraig042
Posts
86
Joined
3/4/2013
Location
Jonesborough, TN, USA
2/9/2025 3:07pm Edited Date/Time 2/9/2025 3:09pm
DServy wrote:
Discussed here:https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about...

Discussed here:
https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-innovation,10797?page=741#comment-535516

Though it does seem like the EU ban is more "rumblings" from those in the industry than anything official. But we've talked about it on this thread before. 

I'm just repeating what's been said before on the EU front, however I do know there are a couple bike releases dependent on SRAM introducing their new brakes first. 

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading...

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading one evil for another. It appears that the EU and other places are looking to impose more restrictions on DOT fluid to reduce the number of harmful chemicals used, but not explicitly saying that mineral oil is better alternative. 

It wouldn't surprise me if its purely a cost thing - that lack of regulation means brake companies can put what ever discount baby oil in their brakes they feel like and it doesn't need to meet any standards. 

I'm guessing it's probably more down to the fact that DOT is a fair bit nastier on terms of corrosiveness and toxicity, no? 

1
3
2/9/2025 3:46pm
The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading...

The "preference" for Mineral oil doesn't seem to have much scientific basis to it, and it is still a petroleum product so you're really just trading one evil for another. It appears that the EU and other places are looking to impose more restrictions on DOT fluid to reduce the number of harmful chemicals used, but not explicitly saying that mineral oil is better alternative. 

It wouldn't surprise me if its purely a cost thing - that lack of regulation means brake companies can put what ever discount baby oil in their brakes they feel like and it doesn't need to meet any standards. 

I'm guessing it's probably more down to the fact that DOT is a fair bit nastier on terms of corrosiveness and toxicity, no? 

Carraig042 wrote:

Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. 

safety data sheets are publicly available btw, from the shimano oil one-

 https://si.shimano.com/pdfs/compliance/sds/HYDRAULIC%20MINERAL%20OIL-202206-ENG-CLP.pdf

2.2. Label elements
Labelling according to Regulation (EC) No. 1272/2008 [CLP]
Hazard pictograms (CLP) :
GHS08
Signal word : Danger
Contains : Distillates (petroleum), hydrotreated light paraffinic; Baseoil— unspecified,
Distillates (petroleum), solvent-dewaxed heavy paraffinic; Baseoil—
unspecified
Hazard statements (CLP) : H304 - May be fatal if swallowed and enters airways.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements (CLP) : P102 - Keep out of reach of children.
P273 - Avoid release to the environment.
P301+P310+P331 - IF SWALLOWED: Immediately call a POISON CENTER, a
doctor. Do NOT induce vomiting.
P405 - Store locked up.
P501 - Dispose of contents and container to an approved waste disposal
plant.

 

The following restrictions are applicable according to Annex XVII of the REACH Regulation (EC) No 1907/2006:
3(b) Substances or mixtures fulfilling the criteria for any of the following hazard
classes or categories set out in Annex I to Regulation (EC) No 1272/2008: Hazard
classes 3.1 to 3.6, 3.7 adverse effects on sexual function and fertility or on
development, 3.8 effects other than narcotic effects, 3.9 and 3.10

8
JVP
Posts
233
Joined
4/20/2016
Location
Bellingham, WA, USA
2/9/2025 5:41pm
Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. safety data sheets are publicly available btw...

Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. 

safety data sheets are publicly available btw, from the shimano oil one-

 https://si.shimano.com/pdfs/compliance/sds/HYDRAULIC%20MINERAL%20OIL-202206-ENG-CLP.pdf

2.2. Label elements
Labelling according to Regulation (EC) No. 1272/2008 [CLP]
Hazard pictograms (CLP) :
GHS08
Signal word : Danger
Contains : Distillates (petroleum), hydrotreated light paraffinic; Baseoil— unspecified,
Distillates (petroleum), solvent-dewaxed heavy paraffinic; Baseoil—
unspecified
Hazard statements (CLP) : H304 - May be fatal if swallowed and enters airways.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements (CLP) : P102 - Keep out of reach of children.
P273 - Avoid release to the environment.
P301+P310+P331 - IF SWALLOWED: Immediately call a POISON CENTER, a
doctor. Do NOT induce vomiting.
P405 - Store locked up.
P501 - Dispose of contents and container to an approved waste disposal
plant.

 

The following restrictions are applicable according to Annex XVII of the REACH Regulation (EC) No 1907/2006:
3(b) Substances or mixtures fulfilling the criteria for any of the following hazard
classes or categories set out in Annex I to Regulation (EC) No 1272/2008: Hazard
classes 3.1 to 3.6, 3.7 adverse effects on sexual function and fertility or on
development, 3.8 effects other than narcotic effects, 3.9 and 3.10

Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in brakes, neither of them work well as a skin care product or beverage.

7
Buckets Up
Posts
253
Joined
10/18/2010
Location
Hancock, MI, USA
2/9/2025 6:14pm
Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. safety data sheets are publicly available btw...

Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. 

safety data sheets are publicly available btw, from the shimano oil one-

 https://si.shimano.com/pdfs/compliance/sds/HYDRAULIC%20MINERAL%20OIL-202206-ENG-CLP.pdf

2.2. Label elements
Labelling according to Regulation (EC) No. 1272/2008 [CLP]
Hazard pictograms (CLP) :
GHS08
Signal word : Danger
Contains : Distillates (petroleum), hydrotreated light paraffinic; Baseoil— unspecified,
Distillates (petroleum), solvent-dewaxed heavy paraffinic; Baseoil—
unspecified
Hazard statements (CLP) : H304 - May be fatal if swallowed and enters airways.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements (CLP) : P102 - Keep out of reach of children.
P273 - Avoid release to the environment.
P301+P310+P331 - IF SWALLOWED: Immediately call a POISON CENTER, a
doctor. Do NOT induce vomiting.
P405 - Store locked up.
P501 - Dispose of contents and container to an approved waste disposal
plant.

 

The following restrictions are applicable according to Annex XVII of the REACH Regulation (EC) No 1907/2006:
3(b) Substances or mixtures fulfilling the criteria for any of the following hazard
classes or categories set out in Annex I to Regulation (EC) No 1272/2008: Hazard
classes 3.1 to 3.6, 3.7 adverse effects on sexual function and fertility or on
development, 3.8 effects other than narcotic effects, 3.9 and 3.10

JVP wrote:
Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in...

Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in brakes, neither of them work well as a skin care product or beverage.

But one of them doesn’t strip paint, ruin rubber durometer, or make certain plastics brittle.

16
2
Kango
Posts
42
Joined
1/4/2023
Location
Calgary, AB, CA
2/9/2025 6:18pm
Etney wrote:
A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.Ben Hildred is doing his climbing...

A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.

Ben Hildred is doing his climbing challenge, where he climbs 10k feet a day, for 100 days, and I spotted him covering up the caliper on his latest story - Strange, because I thought he just ran regular Level Ultimate Stealth's - But went through his old stories from these past climbs, and managed to spot two pics of a caliper, that size-wise looks like a level, but it differs in shape. It also seems to say "Prototype" when you zoom in on phone. Pic quality here doesnt really translate though.

This challenge is probably a very good test for most of the components on his bike, so no wonder sram wants to torture test some brakes. He's also running the yet to be released new axs dropper. 

 

From his story today

476378870 1183461489983538 398119426725913942 n

Managed to see a pic with a text that looks to say "prototype" - You can also see that the side of the caliper is flat, compared to the current level brake which has a "ridge" in the side (see pic at bottom)
475970799 643709258156092 2987493753364364513 n.jpg?VersionId=hYmJR.FkgVnQ0lDNVX4b

"SRAM" seems to be etched/laser engraved on top of the caliper

476348076 2286507415077362 9139535672293089080 n

 

Current level ultimate caliper
09d48dd9e931bdecb1f0af694b78ac37.jpg?VersionId=funDACagldc F V.3T

Could be that new oval single piston design.

2
2/9/2025 7:15pm
Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. safety data sheets are publicly available btw...

Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. 

safety data sheets are publicly available btw, from the shimano oil one-

 https://si.shimano.com/pdfs/compliance/sds/HYDRAULIC%20MINERAL%20OIL-202206-ENG-CLP.pdf

2.2. Label elements
Labelling according to Regulation (EC) No. 1272/2008 [CLP]
Hazard pictograms (CLP) :
GHS08
Signal word : Danger
Contains : Distillates (petroleum), hydrotreated light paraffinic; Baseoil— unspecified,
Distillates (petroleum), solvent-dewaxed heavy paraffinic; Baseoil—
unspecified
Hazard statements (CLP) : H304 - May be fatal if swallowed and enters airways.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements (CLP) : P102 - Keep out of reach of children.
P273 - Avoid release to the environment.
P301+P310+P331 - IF SWALLOWED: Immediately call a POISON CENTER, a
doctor. Do NOT induce vomiting.
P405 - Store locked up.
P501 - Dispose of contents and container to an approved waste disposal
plant.

 

The following restrictions are applicable according to Annex XVII of the REACH Regulation (EC) No 1907/2006:
3(b) Substances or mixtures fulfilling the criteria for any of the following hazard
classes or categories set out in Annex I to Regulation (EC) No 1272/2008: Hazard
classes 3.1 to 3.6, 3.7 adverse effects on sexual function and fertility or on
development, 3.8 effects other than narcotic effects, 3.9 and 3.10

JVP wrote:
Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in...

Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in brakes, neither of them work well as a skin care product or beverage.

Buckets Up wrote:

But one of them doesn’t strip paint, ruin rubber durometer, or make certain plastics brittle.

Ever mixed EPDM rubber and mineral oil...? 

1
Buckets Up
Posts
253
Joined
10/18/2010
Location
Hancock, MI, USA
2/9/2025 7:37pm
Johnboy wrote:

Ever mixed EPDM rubber and mineral oil...? 

No, what does that do?!

vinny4130
Posts
91
Joined
10/12/2009
Location
Albuquerque, NM, USA
2/9/2025 7:48pm
Etney wrote:
A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.Ben Hildred is doing his climbing...

A lot of new regarding brakes these past pages. XTR, Mavens, Hope, and now another addition from SRAM I have spotted.

Ben Hildred is doing his climbing challenge, where he climbs 10k feet a day, for 100 days, and I spotted him covering up the caliper on his latest story - Strange, because I thought he just ran regular Level Ultimate Stealth's - But went through his old stories from these past climbs, and managed to spot two pics of a caliper, that size-wise looks like a level, but it differs in shape. It also seems to say "Prototype" when you zoom in on phone. Pic quality here doesnt really translate though.

This challenge is probably a very good test for most of the components on his bike, so no wonder sram wants to torture test some brakes. He's also running the yet to be released new axs dropper. 

 

From his story today

476378870 1183461489983538 398119426725913942 n

Managed to see a pic with a text that looks to say "prototype" - You can also see that the side of the caliper is flat, compared to the current level brake which has a "ridge" in the side (see pic at bottom)
475970799 643709258156092 2987493753364364513 n.jpg?VersionId=hYmJR.FkgVnQ0lDNVX4b

"SRAM" seems to be etched/laser engraved on top of the caliper

476348076 2286507415077362 9139535672293089080 n

 

Current level ultimate caliper
09d48dd9e931bdecb1f0af694b78ac37.jpg?VersionId=funDACagldc F V.3T

Kango wrote:

Could be that new oval single piston design.

Oval piston? Like formula RO, I hope not.

2
Losifer
Posts
409
Joined
9/12/2017
Location
Sandia Park, NM, USA
Fantasy
2/9/2025 8:07pm
Johnboy wrote:

Ever mixed EPDM rubber and mineral oil...? 

Buckets Up wrote:

No, what does that do?!

About the same as DOT and butyl.

1
2/9/2025 9:06pm Edited Date/Time 2/9/2025 9:07pm
Buckets Up wrote:

No, what does that do?!

Mineral oil destroys EPDM

sspomer
Posts
6332
Joined
6/26/2009
Location
Boise, ID, USA
Fantasy
2/9/2025 9:07pm

matt walker and his prototype session setup

Video Contents
0:00 - Intro, Build Overview & Size
1:22 - Adjustable Pivot Location and Progression
3:04 - Tire Choice, Pressures, Inserts
3:47 - Suspension Settings, Bars, Tinkering
6:00 - Maven Brake Power and Unique Lever Position
7:45 - Seat Height, Testing Philosophy
8:52 - Tuned Mass Damper

16
2/9/2025 9:30pm
iceman2058 wrote:
Is Hope about to come out with a new version of the Tech brakes? This looks suspiciously like a bleed port, which may see the end...

Is Hope about to come out with a new version of the Tech brakes? This looks suspiciously like a bleed port, which may see the end of those messy open reservoir bleeds. Presumably if that's what it is, you'd just need to orient the lever downwards to ensure the bleed port is at the highest point (which would also allow any bubbles to flow around the internal membrane, which typically has a pretty intricate shape). Pic of Adam Brayton's bike on Hope's insta:

new hope

Part of hope brake I really like, it is still messy to bleed any brakes, and rug with mmm drop of dot is not uncommon for any bleed process, at least from my experience 

2
2
juliusk
Posts
116
Joined
1/21/2021
Location
Clausthal-Zellerfeld, DE
2/9/2025 11:23pm
Roryb wrote:
The weight on your headtube is very noticeable though when pulling up the front wheel?I swap between a Dorado and a 180mm mezzer on the same...

The weight on your headtube is very noticeable though when pulling up the front wheel?

I swap between a Dorado and a 180mm mezzer on the same bike.

The weight difference is about 1kg. 

The Dorado is way smoother and eats the rough better at the cost of front end weight which is quite noticeable. 

I assume the same would be true with a shake weight?

I have it in combination with a dorado (not the carbon one) so in theory a super heavy front end. 
The first two runs I felt it being a bit heavier, but after that you‘re used to it.
But honestly there has never been a moment where I felt like it‘s too heavy to do whatever, the bike is like 19 kg+ so that‘s heavy as a whole. 

It‘s rather extreme that, if I take the Tmd off now, the bike actually feels terrible in comparison and I‘m wondering how I could ride it before😅

4
2/10/2025 12:54am

Another Atherton Gearbox bike in the wild


A8AA957F-3955-4FEC-A82A-57632488C9FF

3
TimBud
Posts
544
Joined
2/29/2012
Location
GB
2/10/2025 4:13am Edited Date/Time 2/10/2025 5:59am

When can we accept that sizing is a choice and a preference.

Just because he’s a certain height doesn’t mean he should be forced to follow the size chart.

If you prefer a shorter frame thats great for you, and vice versa, but the under breath criticism of anyone that chooses otherwise is tired.

 

23
1
monarchmason
Posts
325
Joined
5/24/2022
Location
Nevada City, CA, USA
2/10/2025 6:37am Edited Date/Time 2/10/2025 6:37am
Sir HC wrote:
Another Atherton Gearbox bike in the wild

Another Atherton Gearbox bike in the wild


A8AA957F-3955-4FEC-A82A-57632488C9FF

The frame with the logo does not have a seatstay bridge. I wonder if this removable bridge feature would make it to production? I always thought that, customizable flexibility to a frame would be the next thing that companies begin to market since the innovation pool is beginning to seemingly dry up. 

1
2/10/2025 6:50am
The frame with the logo does not have a seatstay bridge. I wonder if this removable bridge feature would make it to production? I always thought...

The frame with the logo does not have a seatstay bridge. I wonder if this removable bridge feature would make it to production? I always thought that, customizable flexibility to a frame would be the next thing that companies begin to market since the innovation pool is beginning to seemingly dry up. 

Both frames have the feature on the lug to allow the plate to attach

3
easton
Posts
32
Joined
9/9/2009
Location
Squamish, BC, CA
2/10/2025 9:37am
TimBud wrote:
When can we accept that sizing is a choice and a preference.Just because he’s a certain height doesn’t mean he should be forced to follow the...

When can we accept that sizing is a choice and a preference.

Just because he’s a certain height doesn’t mean he should be forced to follow the size chart.

If you prefer a shorter frame thats great for you, and vice versa, but the under breath criticism of anyone that chooses otherwise is tired.

 

100%

And it's not just about what's appropriate for one's body and riding style, but what's optimal for the terrain one rides.

It's more like choosing skis than choosing a road bike... 

12
Etney
Posts
122
Joined
12/23/2024
Location
Frankfurt, DE
2/10/2025 10:15am Edited Date/Time 2/10/2025 10:20am

Garbaruk posted on instagram that they have a new product announcing tomorrow, but a guy that I believe is sponsored by garabaruk seems to have pulled the trigger on his post early.

Seems like Garbaruk is launching their own wheelsets, hubs, and spokes. Looks like some nice pieces, and it also seems like they have done a spoke very similar to industry nines "system" spokes. 

Lets just hope they dont charge like €3k+ for a set, which is what a I9 System carbon wheelset with multiple colors costs here in europe. Post says "reasonable pricing" - Who knows what that is these days.

 

EDIT: Apparently its up on their website, with prices. Not cheap, but about €1k cheaper than an I9 Wheelset pre discount (I9 wheels are discounted now, but these are still cheaper)
https://www.garbaruk.com/wheels-parts.html

Took some screenshots, since this instagram post might get deleted:
dfb531e7127fada361381904d5fdbd5b.jpg?VersionId=2

824c91ee52afd119569b98b4548d7d03.jpg?VersionId=TL0X lAEnXsHccKphvEenfuZjTz1i0o6333f46c120d6bdeb78a114c61aa4ae6.jpg?VersionId=yX. ZVyghe62Xq 30qCHg5FhH 1lT83485e4daff269976f402cc5b33235c1.png?VersionId=4ZzZ62QOtdNDC5FrN4PiWfSVa1e250034c532e4322a3afac1b552f0d
22
2/10/2025 11:02am
Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. safety data sheets are publicly available btw...

Yup, my point is if it was being replaced for safety reasons then mineral oil isn't a great choice either. 

safety data sheets are publicly available btw, from the shimano oil one-

 https://si.shimano.com/pdfs/compliance/sds/HYDRAULIC%20MINERAL%20OIL-202206-ENG-CLP.pdf

2.2. Label elements
Labelling according to Regulation (EC) No. 1272/2008 [CLP]
Hazard pictograms (CLP) :
GHS08
Signal word : Danger
Contains : Distillates (petroleum), hydrotreated light paraffinic; Baseoil— unspecified,
Distillates (petroleum), solvent-dewaxed heavy paraffinic; Baseoil—
unspecified
Hazard statements (CLP) : H304 - May be fatal if swallowed and enters airways.
H412 - Harmful to aquatic life with long lasting effects.
Precautionary statements (CLP) : P102 - Keep out of reach of children.
P273 - Avoid release to the environment.
P301+P310+P331 - IF SWALLOWED: Immediately call a POISON CENTER, a
doctor. Do NOT induce vomiting.
P405 - Store locked up.
P501 - Dispose of contents and container to an approved waste disposal
plant.

 

The following restrictions are applicable according to Annex XVII of the REACH Regulation (EC) No 1907/2006:
3(b) Substances or mixtures fulfilling the criteria for any of the following hazard
classes or categories set out in Annex I to Regulation (EC) No 1272/2008: Hazard
classes 3.1 to 3.6, 3.7 adverse effects on sexual function and fertility or on
development, 3.8 effects other than narcotic effects, 3.9 and 3.10

JVP wrote:
Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in...

Yep. This whole thing about mineral oil (petroleum) being a benign substance is just weird and wrong. Both classes of brake fluid can work well in brakes, neither of them work well as a skin care product or beverage.

Buckets Up wrote:

But one of them doesn’t strip paint, ruin rubber durometer, or make certain plastics brittle.

Mineral oil swells EPDM rubber to about twice its size - and also reacts with certain plastics. EPDM is mostly used on bikes for DOT brakes but its commonly used in seals and foam that aren't in contact with oil but are exposed to the elements (nitrile rubber reacts with oxygen, and I think UV). Stuff like your fork sag o-ring is sometimes EPDM, but I'm sure a lot of other parts are too. 

DOT fluid does strip paint but its also water soluble so pretty easy to clean up and only an issue if its left for a long time - manufacturers have been filling brakes with the stuff for decades so far and its not really been a major problem. Mineral oil needs degreaser or harsh solvents to clean up properly, and its thin viscosity means it loves to hide in nooks and crannys 

Point is they are both pretty bad, and whatever precautions you take with one you should take with both. I've heard people describe shimano break fluid as "environmentally friendly" and have this idea that it is very safe to work with which is a dangerous myth IMO. 

23
TEAMROBOT
Posts
1577
Joined
9/2/2009
Location
Los Angeles, CA, USA
Fantasy
2/10/2025 11:15am
Mineral oil swells EPDM rubber to about twice its size - and also reacts with certain plastics. EPDM is mostly used on bikes for DOT brakes...

Mineral oil swells EPDM rubber to about twice its size - and also reacts with certain plastics. EPDM is mostly used on bikes for DOT brakes but its commonly used in seals and foam that aren't in contact with oil but are exposed to the elements (nitrile rubber reacts with oxygen, and I think UV). Stuff like your fork sag o-ring is sometimes EPDM, but I'm sure a lot of other parts are too. 

DOT fluid does strip paint but its also water soluble so pretty easy to clean up and only an issue if its left for a long time - manufacturers have been filling brakes with the stuff for decades so far and its not really been a major problem. Mineral oil needs degreaser or harsh solvents to clean up properly, and its thin viscosity means it loves to hide in nooks and crannys 

Point is they are both pretty bad, and whatever precautions you take with one you should take with both. I've heard people describe shimano break fluid as "environmentally friendly" and have this idea that it is very safe to work with which is a dangerous myth IMO. 

I agree. It also doesn't taste as good as it looks.

Shimano Hydraulic Mineral Oil (500ml) [Y83998030] | Maintenance - Performance Bicycle

How To Make The Perfect KOOL-AID! 💟🍋 (PINK LEMONADE FLAVOR) - YouTube

38
dolface
Posts
1714
Joined
10/26/2015
Location
USA
2/10/2025 11:18am

Loooool! Dario DiGiulio just  mentioned bike brands converging on crab in the latest PB podcast (17:50 if you want to hear it). 🤣🦀

32
2/10/2025 11:20am
Mineral oil swells EPDM rubber to about twice its size - and also reacts with certain plastics. EPDM is mostly used on bikes for DOT brakes...

Mineral oil swells EPDM rubber to about twice its size - and also reacts with certain plastics. EPDM is mostly used on bikes for DOT brakes but its commonly used in seals and foam that aren't in contact with oil but are exposed to the elements (nitrile rubber reacts with oxygen, and I think UV). Stuff like your fork sag o-ring is sometimes EPDM, but I'm sure a lot of other parts are too. 

DOT fluid does strip paint but its also water soluble so pretty easy to clean up and only an issue if its left for a long time - manufacturers have been filling brakes with the stuff for decades so far and its not really been a major problem. Mineral oil needs degreaser or harsh solvents to clean up properly, and its thin viscosity means it loves to hide in nooks and crannys 

Point is they are both pretty bad, and whatever precautions you take with one you should take with both. I've heard people describe shimano break fluid as "environmentally friendly" and have this idea that it is very safe to work with which is a dangerous myth IMO. 

TEAMROBOT wrote:
I agree. It also doesn't taste as good as it looks.

I agree. It also doesn't taste as good as it looks.

Shimano Hydraulic Mineral Oil (500ml) [Y83998030] | Maintenance - Performance Bicycle

How To Make The Perfect KOOL-AID! 💟🍋 (PINK LEMONADE FLAVOR) - YouTube

OHHHHHHHHH YEAAAAHHHHHHHHHHHH

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