I‘m using last gen SRAM Force AXS. Started with SRAM rotors. They ware always squealing so a few weeks ago I bought some Dura Ace rotors. As y’all can tell – still no bueno. I’ve readjusted the calipers multiple times, the system is perfectly bled, the rotors are clean and bedding in was done nice and slowly. Does anybody have any suggestions on how to get rid of this stuttering?
by GreenMoody
24 Comments
Do you know if your pads are sintered or organic?
The organic ones seem to be a lot more quiet.
My shimanos make the exact same noise. One day I’ll be arsed to have a look what it is.
I recognise this noise, it happened when I didn’t torque the caliper properly
Yeah, maybe a worn hub or something if not the caliper?
Sounds like a stone is stuck in there.
Have you taken it to a bike shop to get it looked at?
Mine sounds exactly the same, probably done around 850 miles from new. Only under heavy braking though
Are both pads retracting all the way ? I had a bad caliper that was causing the pistons to stick on one side and they made awful noise under load since the pads weren’t evenly touching the disc.
They have been silent since I replaced the caliper
Contaminated pads? You should use new pads and clean rotors carefully.
Disc brakes on road bikes is just a fuff!
It’s all about RIM BRAKES!!!! Finally someone is waking up. Nice!
I don’t like the direction the bike industry is going these days, much more expensive, much harder to work on anything, hidden cables, no more mechanical shifting. What the!?!
I still have 2 amazing rim brake bikes, I would probably buy a rim brake version of one of those winspace frames if I were to build something new today and a nice pair of rim brake carbon wheels.
My sram ones are exactly the same under hard braking. Never had the issue with my shimano bikes
That is not normal. Many have disks that work fine.
Lift the wheel off the ground and look for wobble. It’s either in the rotor alignment or the hub.
Bike brakes work on the same principle as car brakes.
The rotor has to be mounted in parallel with the calipers. The rotor has to meet run out specs. The pistons have to release as designed.
There has to be a wobble. Otherwise, the noise would be continuous for each rotation.
Are the pads glazed perhaps?
I had a horrible noise develop on my front brake, and did a process of short hard braking which seemed to help.
Or take the pads out and scuff the surface
Yeah all you old guys riding your quiet, simple, effective, aerodynamic, lightweight rim brakes pipe down! We have a serious problem here with expensive, short-lived pads making noise against the bolt-on rotating disc because they had to stop the bike a lot of times!
Check the wheel bearings
Contaminated for sure.
I bought a bike from a heavy smoker once (bike kept indoors and never ridden), it was sticky all over from the tar and the brakes sounded exactly like this. I replaced the discs and pads.
If it’s been like that from new then they got contaminated somewhere before you got it.
I’d sand the pads and isopropyl (or use a can of brake cleaner) on the discs.
If that has no success then replace the pads and discs.
I know you’ve said the pads are bedded and everything. If you hadn’t said that, my first through is to check the pad wear and verify the both of the pads are installed correctly. It sounds like one, or both, of the pads is installed with the metal backing plate contacting the rotor. I’ve done dozens of disc installs with various combinations of rotors, pads, and calipers and I’ve only heard this noise when the rotor was being contacted by something other than pad material…. And one special case with a floating rotor…. But I doubt you’re using Hope rotors…
When you say “bedding in was done nice and slowly” what exactly do you mean?
That’s what mine sound like when the pad is worn down to metal.
I have SRAM force AXS on my road bike and it sounds exactly the same under heavy breaking. I think it’s just a SRAM thing unfortunately since I had a gravel bike with SRAM red axs and it was the same if not worse. I had the LBS have a look at it and they recommended getting swissstop pads instead of the SRAM ones, not sure how much that would help though. There’s a few tricks like making sure the caliper is centred but I don’t think the noise goes away with hard braking (short of replacing the pads maybe)
Edit: if you want to look up more info on it, search for something like “SRAM turkey gobble noise”
Have you faced the mounts?
Sounds like a SRAM brake to me. My old Avids sounded the same, they braked just fine despite the turkey noises
Mine used to make this sound all the time as well. Took the rotors off and cleaned them with just soap and water. Then rehung them and put the wheels back on, loosened the callipers, applied the brake and then tightened callipers before releasing. Seems to have stopped the turkey gobble entirely.