Stupid disc brakes are driving me crazy

[R3awak3n]

Originally Posted by 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.

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

[R3awak3n]

Originally Posted by Fatty

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]

Originally Posted by 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.

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]

Originally Posted by jbreebs

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]

Originally Posted by gpendergast

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.

[gomango]

Originally Posted by ergott

Shimano hydraulic fixes all things.

Certainly does on my Yeti SB5.

How shall I build this little charmer?

[IMG]Untitled by gomango1849, on Flickr[/IMG]

[R3awak3n]

Originally Posted by ergott

Shimano hydraulic fixes all things.

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]

Originally Posted by R3awak3n

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.