MTB Tech Rumors and Innovation

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3/4/2025 4:50am
sspomer wrote:
i think it's a fantastic track for testing (kinda has everything including some decent speed and riders probably know it well and can feel product tweaks...

i think it's a fantastic track for testing (kinda has everything including some decent speed and riders probably know it well and can feel product tweaks easily), just bonkers so much stuff is out in the open at such a popular locale.

As long as you don't wear a team uniform and draw attention to yourself almost nobody notices, especially on work days. I rode Digit prototypes around...

As long as you don't wear a team uniform and draw attention to yourself almost nobody notices, especially on work days. I rode Digit prototypes around Laguna for years and nobody noticed. That all changed when I added stickers, started telling the story, and wearing a logo jersey.

I could never do secret product testing, the urge to nerd out would overpower any NDA I was made to sign. xD

4
mfoga
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Fantasy
3/4/2025 5:41am
ebruner wrote:
I don't think Laguna has much training value... but it is a good place for suspension setup/testing, especially if you're someone like Bernard who is going...

I don't think Laguna has much training value... but it is a good place for suspension setup/testing, especially if you're someone like Bernard who is going to get one setup dialed, and then adapt his riding to it from location to location.  the high speed chunk/chatter makes for exposing how crap your setup is for compression/rebound.  If you can get a comfortable setup for laguna off menu stuff at 10/10ths, then my experience is that setup is g2g as grip gets better and only in mud are you left slowing things down.  

I'm not saying the trail itself isn't worthy. It could use more maintenance and trimming but it does the job.Its more the bizarre nature of top...

I'm not saying the trail itself isn't worthy. It could use more maintenance and trimming but it does the job.

Its more the bizarre nature of top level professional athletes on prototype gear blitzing a trail in public open space that's crowded with hikers, dog walkers, jerrys etc. Like why hasn't MTB in the US/CA progressed to a point where these companies have private tracks? Seems pretty advantageous for R&D and added benefit for athletes that visit. 

 

ebruner wrote:
There aren't many, if any jerry's on the off the menu stuff.  Telonics is fairly isolated other the the fire road transfer and cross over.  If...

There aren't many, if any jerry's on the off the menu stuff.  Telonics is fairly isolated other the the fire road transfer and cross over.  If you know of a shuttle-able trail close to the socal mtb industry, that can push a dh bike and has ocean views to enjoy, then I think those people would be stoked to hear about it.  

While there are plenty of things that I do/don't love about living in socal... Ripping trails before/after work with ocean views that are world class difficult and looking at the sunrise/sunset, definitely gets filed in the love side of the equation.  Doing that is notable/memorable to those that visit, and the trail conditions and grip are absolute trash so it makes for a good way to push the limits of the hardware/gray matter.

Regarding test tracks... that mostly has to do with land access issues and real estate cost here in California.  Some brands have some trails/areas that they use (Specialized = aurburn, There was a trail just above lake elsinore that gwin used, there is stuff in aptos and ucsc that other brands use).  

There are the other ones that get used all the time out by Lake Elsinore trail, east and north of it.  

1
marzbomber888
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Vancouver, WA, USA
3/4/2025 12:52pm

Saw this leaked in another forum. Thought I would post here too. Looks like it’s using a Bosch motor. And looks to basically being an electrified sentinel. Name appears to be regulator SX.IMG 0737 0

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1
ebruner
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Tustin, CA, USA
3/4/2025 2:41pm

transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  

nah but seriously, that's an interesting bike.  I'm going to assume, becuase what's the worst that could happen.  Hopefully, that's got a bosch SX and is a light weight ebike.  I'm surprised how few bikes are on the market using that drivetrain.  The norco fluid vlt is a pretty sweet bike that I feel like is under appreciated... I've taken a spin on that bike and the bosch sx has a really natural feeling that benefits from spinning it up with a high cadance.  

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3/4/2025 6:33pm

AP running mass damper, ochain and brake arm again

IMG 5822IMG 5823.png?VersionId=dBF md3QRKFoVAIMG 5825
16
Kango
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Calgary, AB, CA
3/4/2025 10:10pm
ebruner wrote:
transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  nah but seriously, that's an interesting bike.  I'm going...

transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  

nah but seriously, that's an interesting bike.  I'm going to assume, becuase what's the worst that could happen.  Hopefully, that's got a bosch SX and is a light weight ebike.  I'm surprised how few bikes are on the market using that drivetrain.  The norco fluid vlt is a pretty sweet bike that I feel like is under appreciated... I've taken a spin on that bike and the bosch sx has a really natural feeling that benefits from spinning it up with a high cadance.  

I just got a Transition Relay. I'm a bit nervous reading about all the reliability issues of the Fazua motor. havent rode it yet as its still snow and wet on the trails. I think more and more will be going to the Bosch SX for light weight ebikes.

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3/4/2025 10:45pm

New TQ will be coming on updated Fuel EXE - Run out sales happening, slash+ To get more models when new TQ comes.
I was talking to a trek rep who knows me and said "just wait, You're fussy and youll like whats coming"

I buy Far to many bikes.

9
1
TannerVal
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Hampton, NH, USA
3/5/2025 4:54am
ebruner wrote:
transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  nah but seriously, that's an interesting bike.  I'm going...

transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  

nah but seriously, that's an interesting bike.  I'm going to assume, becuase what's the worst that could happen.  Hopefully, that's got a bosch SX and is a light weight ebike.  I'm surprised how few bikes are on the market using that drivetrain.  The norco fluid vlt is a pretty sweet bike that I feel like is under appreciated... I've taken a spin on that bike and the bosch sx has a really natural feeling that benefits from spinning it up with a high cadance.  

I’m bummed to see they’re possibly going SX. The full power gen 5 is marginally lighter and far more capable (can be tuned down if you want it to ride like the SX and doesn’t weight much more). There’s a few examples already of some Gen5 bikes on the market that are lighter than SX bikes which I feel defeats the whole purpose of the SX system.

5
TannerVal
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Hampton, NH, USA
3/5/2025 4:56am
New TQ will be coming on updated Fuel EXE - Run out sales happening, slash+ To get more models when new TQ comes.I was talking to...

New TQ will be coming on updated Fuel EXE - Run out sales happening, slash+ To get more models when new TQ comes.
I was talking to a trek rep who knows me and said "just wait, You're fussy and youll like whats coming"

I buy Far to many bikes.

I’ve heard the new motor is called the HPR 60, going to be 60NM instead of 50

4
gbcoke
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USA
3/5/2025 5:28am
ebruner wrote:
transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  nah but seriously, that's an interesting bike.  I'm going...

transition should have named that jpeg (and project) internally "WarrenG".  ok, I'll show myself out.  

nah but seriously, that's an interesting bike.  I'm going to assume, becuase what's the worst that could happen.  Hopefully, that's got a bosch SX and is a light weight ebike.  I'm surprised how few bikes are on the market using that drivetrain.  The norco fluid vlt is a pretty sweet bike that I feel like is under appreciated... I've taken a spin on that bike and the bosch sx has a really natural feeling that benefits from spinning it up with a high cadance.  

TannerVal wrote:
I’m bummed to see they’re possibly going SX. The full power gen 5 is marginally lighter and far more capable (can be tuned down if you...

I’m bummed to see they’re possibly going SX. The full power gen 5 is marginally lighter and far more capable (can be tuned down if you want it to ride like the SX and doesn’t weight much more). There’s a few examples already of some Gen5 bikes on the market that are lighter than SX bikes which I feel defeats the whole purpose of the SX system.

When a brand works with Bosch ,it's usually not with only one of the motors ... Smile

4
Jakub_G
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SK
3/5/2025 6:05am
Lacanuck24 wrote:
https://www.instagram.com/reel/DGlXfYzMdDA/?igsh=MWFlZ2JvN3E4M2cybA%3D%3DSorry, I'm old, don't know how to embed that thing into my post. Kinda surprised that thing wasn't already here. On another note, a new non-Saint...

image 214

https://www.instagram.com/reel/DGlXfYzMdDA/?igsh=MWFlZ2JvN3E4M2cybA%3D%3D

Sorry, I'm old, don't know how to embed that thing into my post. 

Kinda surprised that thing wasn't already here. On another note, a new non-Saint DH drivetrain is a coming!

More like short cage opt on for transmission crap derailleurs. 

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9
3/5/2025 6:35am
AP running mass damper, ochain and brake arm again

AP running mass damper, ochain and brake arm again

IMG 5822IMG 5823.png?VersionId=dBF md3QRKFoVAIMG 5825

More floating brake arms on Horst link bikes....

3/5/2025 7:10am
AP running mass damper, ochain and brake arm again

AP running mass damper, ochain and brake arm again

IMG 5822IMG 5823.png?VersionId=dBF md3QRKFoVAIMG 5825

More floating brake arms on Horst link bikes....

I think the V5 is a 6 bar bike?

4
matmattmatthew
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Fresh Prince of Bel Air, MD, USA
3/5/2025 7:30am

Aussie makes his own 2chainz bike 

 

 

This makes me want to buy a High Pivot frame and a lathe.

12
3/5/2025 8:17am
AP running mass damper, ochain and brake arm again

AP running mass damper, ochain and brake arm again

IMG 5822IMG 5823.png?VersionId=dBF md3QRKFoVAIMG 5825

More floating brake arms on Horst link bikes....

I think the V5 is a 6 bar bike?

Yes, but it still has a Horst link. 

1
7
biggs
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Bellingham, WA, USA
3/5/2025 8:21am

Another little look at the new Transition Regulator from MBR's Super Deluxe Ultimate review.  JPEG's name is "MBR-10-02-2025-Transition-Regulator-CX-35-e1741078913365.jpg"

MBR-10-02-2025-Transition-Regulator-CX-35-e1741078913365
11
TheFBI
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Location
London, GB
3/5/2025 9:45am

Aussie makes his own 2chainz bike 

 

 

This makes me want to buy a High Pivot frame and a lathe.

Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is 6 cogs and an extra chain. I don't understand it. 

3/5/2025 10:06am

Aussie makes his own 2chainz bike 

 

 

This makes me want to buy a High Pivot frame and a lathe.

TheFBI wrote:
Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is...

Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is 6 cogs and an extra chain. I don't understand it. 

Not an engineer but I assume it’s still less bends/contact points on the big primary chain. Since the smaller chain is fixed I doubt it creates much drag. That being said I would think the bigger advantage is on the descents where you are essentially removing the chain growth that makes idlers necessary in the first place. 

2
3/5/2025 10:21am

Aussie makes his own 2chainz bike 

 

 

This makes me want to buy a High Pivot frame and a lathe.

TheFBI wrote:
Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is...

Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is 6 cogs and an extra chain. I don't understand it. 

Not an engineer but I assume it’s still less bends/contact points on the big primary chain. Since the smaller chain is fixed I doubt it creates...

Not an engineer but I assume it’s still less bends/contact points on the big primary chain. Since the smaller chain is fixed I doubt it creates much drag. That being said I would think the bigger advantage is on the descents where you are essentially removing the chain growth that makes idlers necessary in the first place. 

To me, the advantage is in the separation of the chain to the pedal kick. The rear end would essentially feel chain-less. This will change the anti squat a bit also.

Personally I’ve never really worried much about idler efficiency on a high pivot bike, if it’s clean I never thought it was an issue. But I also don’t live in an area with mud.

2
nsp234
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Location
CH
3/5/2025 11:36am

Technically, I guess you'd mainly calculate the total angle the links make when circulating through the drivetrain. That's why roadies buy expensive, large pulleys for their derailleurs and why some HP frames employ fairly large idlers. Also, it might be possible to reduce chain skew

2
3/5/2025 11:53am
New TQ will be coming on updated Fuel EXE - Run out sales happening, slash+ To get more models when new TQ comes.I was talking to...

New TQ will be coming on updated Fuel EXE - Run out sales happening, slash+ To get more models when new TQ comes.
I was talking to a trek rep who knows me and said "just wait, You're fussy and youll like whats coming"

I buy Far to many bikes.

TannerVal wrote:

I’ve heard the new motor is called the HPR 60, going to be 60NM instead of 50

Would be great if they made it backwards compatible, ie you could fit it in the same bike as a hpr50. I ride a fuel exe and it's such a great handling bike, a little more grunt on the climbs would be ace though!

4
3/5/2025 11:56am

The primary source of friction in chain drives (cross chaining aside) is the links rotating as they enter each chain ring. The larger the degree that the rotate, the more friction there is. Larger chain rings equate to less friction because the chain links don't have to rotate as much. The amount of chain actually in contact with the chain ring does not matter because it's static relative to the chain ring. For example, on a 36T chain ring each link has to rotate 10 degrees relative to the adjacent link as it enters the chain ring. Meanwhile, on a 24T chain ring each link has to rotate 15 degrees which results in more drag. In the case of this bike, the idler appears to be a 16T idler. By doubling up the number of chains at the idler position, you'd need to have a 32T there to have identical drag. 

17
Digit Bikes
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Irvine, CA, USA
3/5/2025 12:14pm Edited Date/Time 3/5/2025 8:09pm

Aussie makes his own 2chainz bike 

 

 

This makes me want to buy a High Pivot frame and a lathe.

TheFBI wrote:
Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is...

Can someone explain how this is more efficient than just a regular idler? Regular idler is 1 chain with 5 cogs to bend around. This is 6 cogs and an extra chain. I don't understand it. 

The difference for this system is that the lower span of chain will not be stretched out as the suspension extends, this will keep the derailleur cage from swinging around which might make the bike quieter (or it might make it louder because the lower span of chain is closer to the chainstay). If shorter cage derailleurs were available (only on XTR these days I think) those could potentially be used with this idler set-up.

The efficiency and pedal kickback will be basicaly the same for both systems (yes, there might be some differences due to chain wrap, but insignificant especially with a well maintained chain).

The biggest differences in this instance are that the idler size has changed dramatically, and it looks like the idlers aren't the same size which would put you in a diffferent rear cog for the same gear inches. These will effect antisquat and chain growth of the all important tension segment. 

7
Uncle Cliffy
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Location
Medford, OR, USA
3/5/2025 2:54pm

Spotted on Insta;


IMG 9880

43
3/5/2025 3:17pm Edited Date/Time 3/5/2025 3:37pm
Spotted on Insta;

Spotted on Insta;


IMG 9880

Now that the picture is clear, seeing the setup key and knurled ring makes me think, no B screw?

1
3/5/2025 3:21pm

Yes, but it still has a Horst link. 

Why the down votes? The Commencal has a pivot on the chainstay in front of the rear axle. The whole point of putting the pivot there is to control how much the member that the brake mount is on, the seatstay, rotates (or doesn't rotate) during compression. Else why put it there? Putting it on the seatstay would make the brake mount attached to the chainstay, and this reduces the number of pivots on the chainstay, making it simplier/easier to tune rear end flex. Having a pivot there was intentional, and that pivot is referred to as the Horst Link. The same can be said of the Atherton bike (original), which is also  a 6 bar. 

I bring this up because even simpler, true 4 bar designs that we think of more traditionally being a Horst Link like Cube have still experimented with a floating brake, defeating the whole point of the Horst Link. 

1
4
3/5/2025 3:45pm

Yes, but it still has a Horst link. 

Why the down votes? The Commencal has a pivot on the chainstay in front of the rear axle. The whole point of putting the pivot there...

Why the down votes? The Commencal has a pivot on the chainstay in front of the rear axle. The whole point of putting the pivot there is to control how much the member that the brake mount is on, the seatstay, rotates (or doesn't rotate) during compression. Else why put it there? Putting it on the seatstay would make the brake mount attached to the chainstay, and this reduces the number of pivots on the chainstay, making it simplier/easier to tune rear end flex. Having a pivot there was intentional, and that pivot is referred to as the Horst Link. The same can be said of the Atherton bike (original), which is also  a 6 bar. 

I bring this up because even simpler, true 4 bar designs that we think of more traditionally being a Horst Link like Cube have still experimented with a floating brake, defeating the whole point of the Horst Link. 

Horst Link is the name for the whole package, not the pivot on the chainstay

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2
3/5/2025 4:06pm
The primary source of friction in chain drives (cross chaining aside) is the links rotating as they enter each chain ring. The larger the degree that...

The primary source of friction in chain drives (cross chaining aside) is the links rotating as they enter each chain ring. The larger the degree that the rotate, the more friction there is. Larger chain rings equate to less friction because the chain links don't have to rotate as much. The amount of chain actually in contact with the chain ring does not matter because it's static relative to the chain ring. For example, on a 36T chain ring each link has to rotate 10 degrees relative to the adjacent link as it enters the chain ring. Meanwhile, on a 24T chain ring each link has to rotate 15 degrees which results in more drag. In the case of this bike, the idler appears to be a 16T idler. By doubling up the number of chains at the idler position, you'd need to have a 32T there to have identical drag. 

Yes, Track cycling pioneered big chainrings (think 60+ tooth chainring paired with larger cogs 14-17t) around 2008-2010 for sprinting and slowly other track discipline followed and road TT and hit mainstream when the strong road TT guys started having a crack at the modernized Hour record around 2014-15 and onwards. 

Also, there is a short cage XT derailleur RD-M8100-GS for 10-45t cassette and i just learned via email that Madrone will have a short cage option for 10-45t cassette for their Jab derailleur that they are planning to ship late April.

2
shreda
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Location
GB
3/5/2025 4:38pm
Spotted on Insta;

Spotted on Insta;


IMG 9880

Now that the picture is clear, seeing the setup key and knurled ring makes me think, no B screw?

Definitely no B-screw, it‘s Transmission after all. 
Looks nice! 

3
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