Nerding out on Brakes shall we? Not another tech deraliment

HexonJuan
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2/6/2025 2:07pm
Primoz wrote:
For bleeding brakes, has anyone thought of doing it with a vacuum machine? Setting the vacuum low enough (for example 0,9 bar absolute pressure or something...

For bleeding brakes, has anyone thought of doing it with a vacuum machine? Setting the vacuum low enough (for example 0,9 bar absolute pressure or something like that) and connecting both sides of the brake to the same reservoir (Y connection) and vacuuming the reservoir, theoretically you could pull out all the bubbles and with the reservoir they could easily be replaced by oil flowing in from either side.

Eae903 wrote:
My shop is getting a Vaccum fill machine to work on suspension with, specially cane Creek stuff, and if I can I'll see if I can...

My shop is getting a Vaccum fill machine to work on suspension with, specially cane Creek stuff, and if I can I'll see if I can get it to work with brakes, but I have a feeling it's not going to be worth the time and effort. 

Seems like the potential hassle of fully cleaning/purging the different fluids from it may not be ideal.

2
Evil96
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2/7/2025 11:54am

I finally made up my mind on what to replace my MT7 with, the feel and performance of these Tech 4 V4 is impressive, super light action, PLENTY of power while having a impressive amount of modulation, just wow.

With the braided hoses I got a very stiff brake, front and rear feel identical and the bite point is real sharp, not spongy at all.

That being said I decided to go with the TRP RS05 rotors, paired with the stock Race pads, bedding in and first couple mellow rides were nice and quiet, after that it’s squealing like crazy, every time I brake, no matter the intensity or if hot/cold, any tips?

I already tried ala Bee Kay to rub the pads under water and nothing changed

 

Forest-13
1
Simann
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2/8/2025 10:39am Edited Date/Time 2/8/2025 10:40am
Evil96 wrote:
I finally made up my mind on what to replace my MT7 with, the feel and performance of these Tech 4 V4 is impressive, super light...

I finally made up my mind on what to replace my MT7 with, the feel and performance of these Tech 4 V4 is impressive, super light action, PLENTY of power while having a impressive amount of modulation, just wow.

With the braided hoses I got a very stiff brake, front and rear feel identical and the bite point is real sharp, not spongy at all.

That being said I decided to go with the TRP RS05 rotors, paired with the stock Race pads, bedding in and first couple mellow rides were nice and quiet, after that it’s squealing like crazy, every time I brake, no matter the intensity or if hot/cold, any tips?

I already tried ala Bee Kay to rub the pads under water and nothing changed

 

Forest-13

I ran all the Hope pads over the course of a year on my T4 V4's, never had a squeal. But I was using the Hope rotor as well. The TRP rotor alloy may not be a good fit for the Hope pad compound. 

Also, I know you said you have a stiff bite point and no sponginess, but is it possible the pistons are not contacting the pad equally? 

Reason I bring this up is that I had to re center the pads probably once a month. The caliper was not walking on its mount, but it was that the Hope V4 caliper did not engage all of the pistons simultaneously. The banks of pistons would push the pads unequally against the rotor face and cause some weird engagement and pad wear. There are actually a few videos on YT that I discovered about this,

1
AndehM
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Fantasy
2/8/2025 11:12am

I think the big difference between the Canyon video and the latest official SRAM ones is the process for isolating the caliper (by rubber banding lever to bar), then islolating the lever (by closing the caliper bleed syringe & Bleeding Edge fitting).  There are a few other minor differences too like setting contact adjust fully in and reach fully out (both to open up the lever volume as much as possible).

1
ballz
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Ouagadougou, EH
2/8/2025 11:18am
Evil96 wrote:
I finally made up my mind on what to replace my MT7 with, the feel and performance of these Tech 4 V4 is impressive, super light...

I finally made up my mind on what to replace my MT7 with, the feel and performance of these Tech 4 V4 is impressive, super light action, PLENTY of power while having a impressive amount of modulation, just wow.

With the braided hoses I got a very stiff brake, front and rear feel identical and the bite point is real sharp, not spongy at all.

That being said I decided to go with the TRP RS05 rotors, paired with the stock Race pads, bedding in and first couple mellow rides were nice and quiet, after that it’s squealing like crazy, every time I brake, no matter the intensity or if hot/cold, any tips?

I already tried ala Bee Kay to rub the pads under water and nothing changed

 

Forest-13

I alternate two wheelsets with the T4V4s and TRP R1 rotors are definitely noisier than Trickstuff Daechle HDs. 

1
Evil96
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2/8/2025 11:30am
Simann wrote:
I ran all the Hope pads over the course of a year on my T4 V4's, never had a squeal. But I was using the Hope...

I ran all the Hope pads over the course of a year on my T4 V4's, never had a squeal. But I was using the Hope rotor as well. The TRP rotor alloy may not be a good fit for the Hope pad compound. 

Also, I know you said you have a stiff bite point and no sponginess, but is it possible the pistons are not contacting the pad equally? 

Reason I bring this up is that I had to re center the pads probably once a month. The caliper was not walking on its mount, but it was that the Hope V4 caliper did not engage all of the pistons simultaneously. The banks of pistons would push the pads unequally against the rotor face and cause some weird engagement and pad wear. There are actually a few videos on YT that I discovered about this,

took me a minute but the pistons and pads are all perfectly centered, same is the rotor

Evil96
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2/8/2025 11:32am
ballz wrote:

I alternate two wheelsets with the T4V4s and TRP R1 rotors are definitely noisier than Trickstuff Daechle HDs. 

how do the v4 behave with 2mm rotors? reason i went with these other than look is thickness and stiffness, given the v4 caliper is meant to use the 3.3mm rotors, and the floating are just 1.8 ( which i find ridiculous ) i went for something in between, feel is amazing but yeah the noise is the issue, the r1 were noisy on my mt7 but lacked bite badly, these are good rotors so i think it's pad compound or something else

2/8/2025 12:03pm

It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same sound lol.

1
ballz
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2/8/2025 1:17pm Edited Date/Time 2/8/2025 1:17pm
ballz wrote:

I alternate two wheelsets with the T4V4s and TRP R1 rotors are definitely noisier than Trickstuff Daechle HDs. 

Evil96 wrote:
how do the v4 behave with 2mm rotors? reason i went with these other than look is thickness and stiffness, given the v4 caliper is meant...

how do the v4 behave with 2mm rotors? reason i went with these other than look is thickness and stiffness, given the v4 caliper is meant to use the 3.3mm rotors, and the floating are just 1.8 ( which i find ridiculous ) i went for something in between, feel is amazing but yeah the noise is the issue, the r1 were noisy on my mt7 but lacked bite badly, these are good rotors so i think it's pad compound or something else

The work just fine with the 2.05mm rotors, but with the 2.3mm ones, they are more bitey. It's harder to balance the pistons with the thicker rotor, though.

TSchafer
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Denver, CO, USA
2/9/2025 8:15am
It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same...

It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same sound lol.

Totally! I asked pages back about reducing Hope noise, and nothing helped. They work amazingly though so just accepting the squeal.

1
Evil96
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2/9/2025 10:16am
It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same...

It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same sound lol.

TSchafer wrote:

Totally! I asked pages back about reducing Hope noise, and nothing helped. They work amazingly though so just accepting the squeal.

i won't give up ahah

 

1
TimBud
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GB
2/9/2025 11:31am

Hope always have that high pitched squeal.


Its not bad like a honking wet Sram brake, but it is almost constant.


I run the Sram 2mm rotors on my setup and all is good so far (race pads fitted)

1
2/10/2025 5:05am

I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter the weather. Sinter green are also very very quiet pads.

3
Evil96
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2/10/2025 9:50am
petoulachi wrote:
I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter...

I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter the weather. Sinter green are also very very quiet pads.

Any preference between these? I only tried the trickstuff properly and the sinter green were pretty good, similar to the Trickstuff

Never tried the green galfer

Primoz
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SI
2/10/2025 10:30am
AndehM wrote:
I think the big difference between the Canyon video and the latest official SRAM ones is the process for isolating the caliper (by rubber banding lever...

I think the big difference between the Canyon video and the latest official SRAM ones is the process for isolating the caliper (by rubber banding lever to bar), then islolating the lever (by closing the caliper bleed syringe & Bleeding Edge fitting).  There are a few other minor differences too like setting contact adjust fully in and reach fully out (both to open up the lever volume as much as possible).

Yeah, this was all part of the older style guide to bleed Sram brakes... Weird that they simplified it this much.

sprungmass
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Calgary, AB, CA
2/10/2025 10:52am

Since on we are on the topic of brake pads, does anyone have any recommendations for Hayes Dominion A4? My use case is exclusively snow riding in cold temps. I tried their OEM organic pads but they barely lasted a month. Now I am on the OEM metallic pads and they are unbearably loud as soon as the smallest amount of snow touches the rotor. I guess we can compare this to riding in the wet.

I used to run SRAM Code RSC with Trickstuff Power pads and that was a great quiet combo. Unfortunately Trickstuff does not make pads for Dominions. Is the Galfer Pro green a bit similar to TS? My other choice would be the Sinter brand in the same green compound. Thoughts?

2/10/2025 1:20pm
sprungmass wrote:
Since on we are on the topic of brake pads, does anyone have any recommendations for Hayes Dominion A4? My use case is exclusively snow riding...

Since on we are on the topic of brake pads, does anyone have any recommendations for Hayes Dominion A4? My use case is exclusively snow riding in cold temps. I tried their OEM organic pads but they barely lasted a month. Now I am on the OEM metallic pads and they are unbearably loud as soon as the smallest amount of snow touches the rotor. I guess we can compare this to riding in the wet.

I used to run SRAM Code RSC with Trickstuff Power pads and that was a great quiet combo. Unfortunately Trickstuff does not make pads for Dominions. Is the Galfer Pro green a bit similar to TS? My other choice would be the Sinter brand in the same green compound. Thoughts?

I've used both the galfer green pads and TS power pads (admittedly on different brakes to yours, Shimano and Cura 4s). I found them Galfers to be just as good as the TS pads and easier to get hold of. Would be my go to choice now.

1
2/10/2025 1:30pm
It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same...

It's funny how some hope users say never had a noise etc But yet from hope and all the pro's who use them have the same sound lol.

TSchafer wrote:

Totally! I asked pages back about reducing Hope noise, and nothing helped. They work amazingly though so just accepting the squeal.

Evil96 wrote:

i won't give up ahah

 

I've had good luck with Hope Sintered pads mated to Freeza rotors. Very little, if any noise in the wet after a minute going downhill 

1
Slavid666
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Santa Rosa, CA, USA
2/10/2025 7:45pm
sprungmass wrote:
Since on we are on the topic of brake pads, does anyone have any recommendations for Hayes Dominion A4? My use case is exclusively snow riding...

Since on we are on the topic of brake pads, does anyone have any recommendations for Hayes Dominion A4? My use case is exclusively snow riding in cold temps. I tried their OEM organic pads but they barely lasted a month. Now I am on the OEM metallic pads and they are unbearably loud as soon as the smallest amount of snow touches the rotor. I guess we can compare this to riding in the wet.

I used to run SRAM Code RSC with Trickstuff Power pads and that was a great quiet combo. Unfortunately Trickstuff does not make pads for Dominions. Is the Galfer Pro green a bit similar to TS? My other choice would be the Sinter brand in the same green compound. Thoughts?

Sinter Greens. Haven’t run TS’s but out of MTX, Red’s, Golds, both Hayes compounds and Galfer greens, the sinters are the best I’ve used. Run them on A4’s and Kaha’s with the new SE05 TRP rotors on one bike and Galfer Waves on another. Dead silent and more power regardless of how wet it is. Only have a few hundred miles so far but they seem to be wearing well. The stock Kaha pads made the most bizarre warbling noise when you got on the brakes hard. Not quite OG sram turkey call but similar. Drove me nuts.

3
2/11/2025 12:20am Edited Date/Time 2/11/2025 12:21am
petoulachi wrote:
I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter...

I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter the weather. Sinter green are also very very quiet pads.

Evil96 wrote:

Any preference between these? I only tried the trickstuff properly and the sinter green were pretty good, similar to the Trickstuff

Never tried the green galfer

Well, there are quite similar but :

-Galfer are the noisier of the 3. It's subtle but there do make a bit of noise. Trickstuff are second, the Sinter are the most silent I've tried. But we can say that the 3 are silent, it's just nutpicking here

-The galfer fade faster than Trickstuff. Can't say for the Sinter has I've don't run them for long enough to know

 

So the galfer are a bit behind, BUT there usually are cheaper. Can't really go wrong with any of these!

1
Evil96
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2/11/2025 12:39am
petoulachi wrote:
I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter...

I've had T4 and there were a bit noisy with the hope green pads. Using trickstuff or Galfer green and it was dead silent, no matter the weather. Sinter green are also very very quiet pads.

Evil96 wrote:

Any preference between these? I only tried the trickstuff properly and the sinter green were pretty good, similar to the Trickstuff

Never tried the green galfer

petoulachi wrote:
Well, there are quite similar but :-Galfer are the noisier of the 3. It's subtle but there do make a bit of noise. Trickstuff are second...

Well, there are quite similar but :

-Galfer are the noisier of the 3. It's subtle but there do make a bit of noise. Trickstuff are second, the Sinter are the most silent I've tried. But we can say that the 3 are silent, it's just nutpicking here

-The galfer fade faster than Trickstuff. Can't say for the Sinter has I've don't run them for long enough to know

 

So the galfer are a bit behind, BUT there usually are cheaper. Can't really go wrong with any of these!

that's interesting, i guess it also depends on what brakes you used them?

on MT7 the Trickstuff power were impossible to fade for me, and pretty quiet especially at speed, the sinter green i didn't keep for long but i found a bit more bitey and a touch more noisy, Galfer i only tried the purple and found them horrible on maguras, black caliper every run, trickstuff kept everything WAY cleaner

2/11/2025 12:45am

It was on T4V4 / Intend Trinity, same feeling for me on both brakes.

1
sprungmass
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2/11/2025 6:49am
Slavid666 wrote:
Sinter Greens. Haven’t run TS’s but out of MTX, Red’s, Golds, both Hayes compounds and Galfer greens, the sinters are the best I’ve used. Run them...

Sinter Greens. Haven’t run TS’s but out of MTX, Red’s, Golds, both Hayes compounds and Galfer greens, the sinters are the best I’ve used. Run them on A4’s and Kaha’s with the new SE05 TRP rotors on one bike and Galfer Waves on another. Dead silent and more power regardless of how wet it is. Only have a few hundred miles so far but they seem to be wearing well. The stock Kaha pads made the most bizarre warbling noise when you got on the brakes hard. Not quite OG sram turkey call but similar. Drove me nuts.

Thanks, I will give these Sinter guys a shot. I was always intrigued after reading the Enduro Mag brake shootout and how powerful they are. Also the fact couple of you here are saying they are super silent so these should be the ticket to a peaceful descent. 

@Pedal Bob There "performance organics" from likes of Trickstuff and Galfer are something special and can't be compared to the organic offerings from SRAM/Shimano. I have faded SRAM metallic pads on our long mountain descents while had zero issues with Trickstuff pads. No change in feel, power and last a long time.

2
Teknik
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FI
2/11/2025 7:33am

Nobody seems to run with Shimano OEM metallic pads or atleast  writing any comments to forums. 

Are the all other brands so much better?

2/11/2025 7:55am
Teknik wrote:

Nobody seems to run with Shimano OEM metallic pads or atleast  writing any comments to forums. 

Are the all other brands so much better?

I started using Galfer green pads instead of Shimano because they were significantly cheaper, quieter and didn't feel like I gave up any performance. Galfer's aren't as cheap as they used to be, but still my go to (when using Shimano)

2/11/2025 10:46am
Evil96 wrote:
how do the v4 behave with 2mm rotors? reason i went with these other than look is thickness and stiffness, given the v4 caliper is meant...

how do the v4 behave with 2mm rotors? reason i went with these other than look is thickness and stiffness, given the v4 caliper is meant to use the 3.3mm rotors, and the floating are just 1.8 ( which i find ridiculous ) i went for something in between, feel is amazing but yeah the noise is the issue, the r1 were noisy on my mt7 but lacked bite badly, these are good rotors so i think it's pad compound or something else

I'm currently run v4 with sram centerline rotors (1.8 ) while awaiting shipment of thicker rotors, works just fine, U will need to file down sram brake mount adapter to fit caliper on 200mm rotor tho (code replacement on the bike)

Digit Bikes
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2/13/2025 12:03pm Edited Date/Time 2/14/2025 8:27am
For longer levers you could try BL-MT410. At Sea Otter, Evan of Contra displayed his bike at my booth and we had a little Shigura convention...

For longer levers you could try BL-MT410.

At Sea Otter, Evan of Contra displayed his bike at my booth and we had a little Shigura convention, we had 3 variants. All used Magura 4-pot calipers. Ring used non-servowave XTR BL-M9100; Datum used Servowave XTR BL-M9120; Contra used long-levered non-Servowave BL-MT410.

We both said that our primary motivations were ergonomics/reliability. I like the reliabilty of the Magura calipers (I'd prefer if the pads retracted futher), and I like that the Shimano levers have the hose pointing in the correct direction and have good shifter integration (I've never gotten along with the ergonomics resulting from 2 bolt clamp shifter integration).

Regarding Servowave: in use the biggest things I notice is that the reach adjust on BL-M9100 is fiddly, and the carbon lever is a little bit thinner, so the BL-M9120 lever is a wee bit more comfortable. The Servowave lever does have a shorter stroke than the non-Servowave lever. Maybe I'll assemble a bike with M9100 on one side and M9120 on the other to get a better feel for the difference that Servowave makes.

Regarding power: Perhaps more than enough braking power is enough, and much more than enough braking power is also enough. Just enough braking power is only enough until something unexpected happens so it's best to have a little bit more than 100% of what's needed.

Regarding numbers: Reducing performance to a single number, be it brake leverage, antisquat, weight, other, can distract from choosing a better, complete solution. 

An update to my Shigura experiences:

I've decided I prefer the Servowave levers over the non-Servowave levers. Not because of the Servowave itself, but because they have the free-stroke adjuster.

Interestingly I don't actually use the freestroke adjuster, on M9120  it comes already adjusted in the close to the handlebar position, on M9100 unfortunately the resting position of the lever is always too far away (for my tastes).

3
sprungmass
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2/13/2025 2:14pm Edited Date/Time 2/13/2025 2:15pm

Orbital sander + 120 grit pad 20-30 seconds on each side x2 using medium pressure. This is how I prep my rotors when changing pad compounds/brands. I even do this when changing pads to fresh ones. Never let me down.

Screenshot 2025-02-13 150822

 

image 192
9
2/13/2025 4:20pm
sprungmass wrote:
Orbital sander + 120 grit pad 20-30 seconds on each side x2 using medium pressure. This is how I prep my rotors when changing pad compounds/brands...

Orbital sander + 120 grit pad 20-30 seconds on each side x2 using medium pressure. This is how I prep my rotors when changing pad compounds/brands. I even do this when changing pads to fresh ones. Never let me down.

Screenshot 2025-02-13 150822

 

image 192

Fkn yes! This is the sort of ingenuity that I come here for. 

3
DServy
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Location
Jackson, WY, USA
2/13/2025 4:24pm
sprungmass wrote:
Orbital sander + 120 grit pad 20-30 seconds on each side x2 using medium pressure. This is how I prep my rotors when changing pad compounds/brands...

Orbital sander + 120 grit pad 20-30 seconds on each side x2 using medium pressure. This is how I prep my rotors when changing pad compounds/brands. I even do this when changing pads to fresh ones. Never let me down.

Screenshot 2025-02-13 150822

 

image 192
Johnboy wrote:

Fkn yes! This is the sort of ingenuity that I come here for. 

looks like i'm buying a sander....

5

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