Post #3897741

2026-07-17 23:16 UTC

@rasterweb@mastodon.social asks: My neighbor was complaining about squeaky disc breaks on his bike. I mentioned that I read you can use a high-grit sandpaper to sand the disc a bit and that might fix it... then I offered to help. Q3. Does that work? Is it a good idea to try it? #BikeNiteQ #BikeNite #BikeTooter #Cycling #MastoBikes cc @bikenite@fedigroups.social

Replies (6)

@MartyCormack@urbanists.social 2026-07-17 23:23

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social #BikeNite A3: I have the problem with the rear disc brake on my ebike. I should go to my LBS to get it worked on. But it comes in handy sometimes on Multi Use Trails as it warns non responsive users that I've had to brake to avoid them. Usually when my bell alone wasn't being heeded by them

Open ##3897780
@uxMark@cosocial.ca 2026-07-17 23:25

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social A3. Sandpaper on disc brakes scares me 😱 #BikeNite

Open ##3897860
@ai6yr@m.ai6yr.org 2026-07-17 23:34

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social #BikeNite A3. I have no idea about disc brakes, but BOY, the squeal you hear on steel rims on the Schwinn Varsity I have you can hear for two blocks, people turn their heads trying to figure out what the heck is bearing down upon them. 😂 (SQEEEEEEEEEEEEEEEEE!)

Open ##3902799
@w8emv@a2mi.social 2026-07-17 23:43

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social A3. My disc brakes on my REI e-bike are somewhat squeaky especially in the front. I plan on taking the bike in for a tuneup at 5000 miles and it's close to that now and I'll have them look at it. #biketooter ooter

Open ##3902822
@isol@mastodon.au 2026-07-17 23:48

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social Sandpaper on the PADS can be an interim measure if the pads are badly glazed, but rotor problems are wear (sandpaper would make it worse), bent (sandpaper would make it worse), contaminated with oil etc. (sandpaper would make it worse by spreading the contaminant around), loose (sandpaper would do nothing), or not aligned with caliper (sandpaper can't help here). Which sorta negatively suggests: Replace worn parts Clean rotor and pads Align components Torque correctly Bed new pads in correctly

Open ##3902830
@gcvsa@mstdn.plus 2026-07-18 20:00

@ascentale@sfba.social @rasterweb@mastodon.social @bikenite@fedigroups.social #BikeNite A3. Squeaky disc brakes are generally caused by mechanical vibration of the pads or other components of the brake system, and sanding the rotors is unlikely to help, although sanding the pads might, *if* the pads are glazed. Caution: brake dust is toxic. Some brake pad compounds are more prone to noise than others, and constant, tentative use, or prolonged light use can tend to glaze the pads. (cont)

Open ##3921731