Stupid disc brakes are driving me crazy

[R3awak3n]

You all might know that I was dissing on my TRP spyres and was about to go shimano hydro. I then decided to keep tweeking the spyres and wait till campagnolo releases their hydro version (seriously campy, you are now pissing me off).

Anyways, I was having problems with pull and campy levers but that is solved, I am getting a nice amount of travel, not much mush at all. Pretty happy with that. But now I am getting some bad shudder, only when I am going slow into stopping.

I have pretty much done anything, new pads, new rotor (went 180mm), even put a new caliper because I had one around. Re ajusted and still have this damn shudder. If I squeeze the brake hard it fees like the disc still moves around a tiny little bit. Its like it does not bite properly. I was hopping it would go away once the pads are fully bedded but does not seem like it.

The only thing that seems left to do is to face the mounts but when I first got the bike I did not have this problem and the pads look pretty straight with the rotor. I am out of ideas and it is driving me crazy

[ColonelJLloyd]

You just made that colker guy's month with this post.

Is the shudder from both front and rear?

[colker]

You just made that colker guy's month with this post.

Is the shudder from both front and rear?

I wrote that post. We have an arrangement here.

[R3awak3n]

You just made that colker guy's month with this post.

Is the shudder from both front and rear?

lol.

and only the front, the back is totally fine.

Could be lack of stiffness in the blades? they do flex when I brake a bit but this could also be due to the shudder.

[stuckinthecity]

Have you tried swapping out the rotor adapters?

[ColonelJLloyd]

and only the front, the back is totally fine.

Could be lack of stiffness in the blades? they do flex when I brake a bit but this could also be due to the shudder.

Is your fork the gen 1 NFE fork?

I really couldn't offer much advice besides the normal solutions and this isn't your first rodeo so you know how to setup

Have you tried swapping out the rotor adapters?

Did he say he is using a rotor adapter?

[R3awak3n]

I do't have a rotor adapter. Its a 6 bolt icetech rotor.

Its a gen 3 NFE fork, really have not heard any issues from NFE owners.

I am pretty sure my setup is fine, I did nothing different. I also checked and its not my headset.

[Davist]

I have noticed sometimes when my weight is further forward mine shudder quite a bit, like standing/leaning forward when I stop. I have no idea why, but it did surprise me. Checked everything and when I'm seated it's fine, just shows up once in a while.

[Fatty]

You might have glazed up or contaminated the rear rotor.
Maybe clean up pads and rotor and rebed them gently back together.

[sandyrs]

Two more ideas that are probably somewhere between nonsense and counterproductive:

- What tire are you using, and is it very ill-suited to pavement? I've found that preexisting shudder gets worse when you're riding a knobby tire on the road. Sample size of 1 and all that
- Is there play in your front hub? Not really sure what this has to do with shudder but you've tried everything that makes sense already :)

[R3awak3n]

You might have glazed up or contaminated the rear rotor.
Maybe clean up pads and rotor and rebed them gently back together.

brand new pads. rotor was cleaned up using alcohol so this is very unlikely.

[R3awak3n]

Two more ideas that are probably somewhere between nonsense and counterproductive:

- What tire are you using, and is it very ill-suited to pavement? I've found that preexisting shudder gets worse when you're riding a knobby tire on the road. Sample size of 1 and all that
- Is there play in your front hub? Not really sure what this has to do with shudder but you've tried everything that makes sense already :)

will check the hub because I am not sure.

as far as tire, I am using the babyshoe pass.


edit - just checked, no play in the hub :/

[Fatty]

brand new pads. rotor was cleaned up using alcohol so this is very unlikely.

How did you break them in? Half the battle with disc set ups, really the last part of the install and easy to get wrong.

[Fatty]

Good break in video here

https://www.youtube.com/watch?v=TM8iRpWDVdo

[RudAwkning]

A longshot here, but it worked for me. I was getting some nasty shudder on my bike. Tightened caliper bolts. Checked rotor mounting. Checked for play in hub. Cleaned rotor with Brakleen. Cooked metallic pads over flame. Eventually swapped rotor and pads. Issue persisted.

No perceivable movement in the headset, but decided to snug up the headset bolt anyway. Problem solved.

[R3awak3n]

A longshot here, but it worked for me. I was getting some nasty shudder on my bike. Tightened caliper bolts. Checked rotor mounting. Checked for play in hub. Cleaned rotor with Brakleen. Cooked metallic pads over flame. Eventually swapped rotor and pads. Issue persisted.

No perceivable movement in the headset, but decided to snug up the headset bolt anyway. Problem solved.

I will be doing this when I get home. Just a tad. Thats a good sugestion!

[R3awak3n]

How did you break them in? Half the battle with disc set ups, really the last part of the install and easy to get wrong.

I got to about 10-15 mph and hit the brakes until I was almost standing still, then repeated like 15x

[jbreebs]

A longshot here, but it worked for me. I was getting some nasty shudder on my bike. Tightened caliper bolts. Checked rotor mounting. Checked for play in hub. Cleaned rotor with Brakleen. Cooked metallic pads over flame. Eventually swapped rotor and pads. Issue persisted.

No perceivable movement in the headset, but decided to snug up the headset bolt anyway. Problem solved.

I agree - sounds like a headset issue, since you've already checked off most of these other boxes and it didn't get better.

[R3awak3n]

I agree - sounds like a headset issue, since you've already checked off most of these other boxes and it didn't get better.

it could be but I did my normal headset check (turn wheel to the side, hit brake and swing and no signs of any looseness) but will retight everything again when I get home just to make sure.

[zzy]

I'm starting to suspect that the thin, heavily raked fork blades may be causing an issue. Otherwise it may be poor pad alignment, but sounds like you already smoked that out.

[HillDancer]

Show close-up images, that will save a lot of questions asked from this side.

What brand/model of caliper adapter? New pads with new rotor? Any section of brake pad peeking above the rotor? If un-swept strip is visible on edge of rotor, what is its width? Uneven pad deposits (smearing) visible?

If IS mount bracket, face tabs. Use a caliper adapter with raised mounting bolt bosses, but not TRP product. Change pads, install any pad other than TRP. Align caliper, observe pad height on rotor, if all is good, bed brakes, then reevaluate. If shudder persists, choose a rotor with smaller/narrower gaps. Still no fix, install SwissStop organic pads. While the following video emphasizing click with shudder my not apply for your issue, there are illustrations which will aid visualization of most probable faults. Note the illustration of pad/rotor overreach, which is not mentioned as possible fault; critical omission from my experience. https://www.youtube.com/watch?v=1T2RLgQoyvs

[gpendergast]

Another +1 for the headset. Cartridge bearing? Tighten 1/4 turn past where you normally would and try it out around the block.

[gpendergast]

Also - QR hub? Check that skewer's nice & snug

[R3awak3n]

Also - QR hub? Check that skewer's nice & snug

QR is nice and snugg.


@Hilldancer - I have tried a lot of those things, I have tried a bunch of pads, ect. Only thing I have not done is the facing.

[R3awak3n]

tried everything once again, its a bit better but don't think perfect.

headset is nice and snugg, skewer snugg. Installed new pads. cleaned rotors. Reset it all up and looks good, about same distance per pads. No play in hub. Went out and bed the brakes real nice.


The only think i can think is that the pad moves within the brake. THere is some play on the pads and with the flex of the blades I believe could be causing this. Even if I brake and just swing the bike back and forward there is some play and that happens on the pads.

[ergott]

Shimano hydraulic fixes all things.

:hello:

[gomango]

Shimano hydraulic fixes all things.

:hello:

Certainly does on my Yeti SB5.

How shall I build this little charmer?

https://c1.staticflickr.com/4/3933/15631544661_ddf798b952_b.jpg (https://flic.kr/p/pPiKCH)Untitled (https://flic.kr/p/pPiKCH) by gomango1849 (https://www.flickr.com/photos/36270004@N06/), on Flickr

[R3awak3n]

Shimano hydraulic fixes all things.

:hello:

well, if campy does not hurry up and release their crap, I might as well go shimano

[RudAwkning]

What kind of pads are you using? Resin or metallic?

[ergott]

well, if campy does not hurry up and release their crap, I might as well go shimano

Don't count on it and even if it comes out I wouldn't want their first stab at it. I'd wait a generation or two to let them sort out the inevitable issues. Just look at their electric offering.

[oldpotatoe]

Don't count on it and even if it comes out I wouldn't want their first stab at it. I'd wait a generation or two to let them sort out the inevitable issues. Just look at their electric offering.

Their first electronic 'offering' had very few issues or problems. I have first gen Athena, have installed many first gen SR/Record, with no short or long term issues.

[R3awak3n]

What kind of pads are you using? Resin or metallic?

The ones I had on it was a mix. The ones now are organic I am pretty sure.

[ergott]

Their first electronic 'offering' had very few issues or problems. I have first gen Athena, have installed many first gen SR/Record, with no short or long term issues.

But the immediatly came out with a version 2 antiquating your setup. Now at least there are only incremental changes in the electric groups (for Shimano too).