As title says , I recently bought this used bike, rode it for a couple of times (150ish km in total), and I noticed that the brakes made some "hissing noises". Should I replace the brake pads? How much does it usually cost to do such?
by Greg0_
As title says , I recently bought this used bike, rode it for a couple of times (150ish km in total), and I noticed that the brakes made some "hissing noises". Should I replace the brake pads? How much does it usually cost to do such?
by Greg0_
11 Comments
Pads look good, discs might be done though. Check with a caliper
If u just bought it used Id give the Brakes an overhaul and then decide.
Disc thickness must be above 1,5mm.
Take the wheel out and sand the Disc with fine Sandpaper, then use brake cleaner.
(Uninstall the Disc if thats easier for you).
Take out the Pads and examine where that streak came from, might be an object still stuck in the pad.
Sand down the pads. Clean the calipers. Brake in the the disc and pads.
Report back.
Edit: Other mech further down is correct: that disc is through, the braking layer is ground off in the center so the aluminium layer underneath is bare. check with a shop or switch out disc and pads and see if uneven wear persists then check in to a shop.
Might be best to just replace both tbh.
The pads have uneven wear.
And they need to be replaced. Which deduces the rotors also need to be replaced.
Long time tech here, that rotor is roached don’t attempt repairs they will not work. Sure he cleans and sands the rotor but he ends up with a completely uneven POS at the end and the wear has clearly already chewed past one of the layers in that rotor(shimano rotors are layered). New pads will wear unevenly, the pad wear at the top right now is hugely uneven and you can see the rotor is completely shredding the pad on one side, definitely recommend new rotor and pads. If you’re cheap, buy the parts ahead of time online and roll into a shop if you can’t install them yourself
Change pads and rotors, that’s worn.
Replace both
Probably but… it is best to pul the pads and measure them. Also… measure your rotor width
It looks to me like the pads were installed backwards in the caliper. It appears the brake pad material is touching the pistons, and the backing is touching the rotor.
As others have mentioned, these are “ice technology” rotors. Shimano makes their higher end rotors by sandwiching aluminum inside steel on either side. When you see the streaks, you know the rotor is toast.
Potentially you can get by just replacing the rotor and putting the pads in the right way. Safer to just replace everything though.
Tbh it’s no big effort the replace rotors and pads, in doubt always replace.
The discs and the pads look worn, as mentioned the discs look weirdly worn.
I’d recommend to at least adjust the brake caliper after changing discs/pads. This usually is a 1 minute job with shimano brakes and should always be done after changing discs, pads or even unmount/mounting wheels.
I don’t think you can measure the thickness of the pads and millimeters anymore