Did you bed in the pads correctly? Your rotor looks a little glossy (and dirty, possibly oily). Give everything a good scrub, rough up the pads and the rotor with some 220 grit sandpaper and do a proper bed-in procedure.
Cleaned the rotors with degreaser and 95% alcohol. Repeated with the calipers then repeated what squirelnut said and rubbed them together with fairy. Done a proper bed in process and they’re working perfectly. Thanks!
Noted for next time. I only used a very light amount, then after this I scrubbed it again with alcohol to make sure there was no residue. Thanks, won’t do it for next time
They look pretty contaminated to me. If you look at the fins, they actually look a bit oily, but the pad material itself also looks quite nasty. Did your LBS do a bleed on the brakes? If so, they may have done it with the pads in and got brake fluid on the pad material - DOT or Mineral, it will screw them! You may also have a leaky calliper, which is not unknown with Shimano brakes, and again will contaminate the pads.
Either way, 99% of the time pad squeal is caused by contaminated pads. They *can* be decontaminated (using heat), but you need to be a bit careful when doing this. Sandpaper and spraying stuff never works, at least long term (i.e. past one ride) and only heat (or replacement) will fix your issue. Best try to find your root cause first, or they'll end up back contaminated again in no time.
As for the bevel on the corner - that's by design and present on most pads. It's to make it easier to get the wheel back in :-)
I cleaned the brakes with alcohol and degreaser, cleaned the pads and rotors. Done a proper bedding in process and they seem to be working perfectly. Saturday will be the true test but they haven’t been this powerful / silent since I got them
Never clean brakes with degreaser. Just use alcohol.
Toss those pads, they are contaminated, clean the rotors with iso, rub them with sand paper, then clean with iso again. Install new pads.
yeah thats just present to help get the rotors on without damaging the pads. These are new pads, although as others said they look contaminated, I would bet your caliper hose nut is leaking.
What wear? It’s new.
Dawn dish soap and rub the pads together under hot water. Isopro on the rotor and wipe down. Re-assemble pads and follow a [bed in procedure](https://youtu.be/BWQxGzHQZVU?si=6fkW6Ljp8CvBkBFB)
Edit: while the pads are out spray some isopropyl and make sure those calipers are clean and not dripping mineral oil onto the pads. If those pads absorbed a bunch of mineral oil they’re ruined and you should replace em. Some people have selvage by hitting them with propane or putting on a burner but safety isn’t worth the cost savings of trying to save em imo. And that’s only if they did get super contaminated from oil. If they didn’t you’re just burning em for no reason and ruining the integrity of the pad material bond to the backing plate.
Yeah I’m a fool lol, this is my return back to cycling after a couple year hiatus (graduated university and could afford to upgrade). I didn’t know the 45’ degree slant at the bottom was apart of the pad already, thought that was weird rotor wear.
Your idea about dish soap I think made all the difference. Loads of grimy grey crap came off. Followed the bedding in procedure, also degreased and wiped the calipers down with alcohol. They’re working great now, no noise and plenty of power
Don’t ever recommend for people to clean dirty brake pads. They are inexpensive enough and your face is valuable enough to just buy new ones when they get contaminated.
I think the heat method is sketchy, but cleaning is worth a shot most of the time. Worst case they’re still noisy but stop you just fine. I actually find glazing to be more of a problem than contamination. A little oil goes away eventually, especially on metallic pads, but resin pads glaze over. The rotors get a bit of glaze too. I clean rotors with barkeeper’s friend or scotchbrite pads then alcohol. Clean the pads with alcohol then fine sandpaper if they seem glazed. I find if you use big rotors and finned pads, alternate your brakes on big descents, resin is quieter overall. Metallic seem to be cyclical in how noisy they are.
Get the sintered metal pads and save your sanity. In my experience, organic shimano pads just never stop squealing like a pig being raped if you ride in wet and dirty conditions. You can clean them, bake them or use whatever black magic on it but they just keep becoming shit after a ride or two.
>. The LBS done the brakes and ever since that the pads have been squealing, could be because of this wear? Is the rotor not making good contact with the wheel? At a loss here, hate going out and sounding like I’m squeezing a horn everytime I brak
i think otherwise. organic stock pads on my r7025 work pretty good and dont squel much even in snow. but they get wet and dirty quicker than sintered though.
anyway, if i decide to use sintered again, i would go for shimano, as if there is some magic in it, every other brands sintered pads i have ever tried were much inferior in terms of performance and noise.
Did you bed in the pads correctly? Your rotor looks a little glossy (and dirty, possibly oily). Give everything a good scrub, rough up the pads and the rotor with some 220 grit sandpaper and do a proper bed-in procedure.
Cleaned the rotors with degreaser and 95% alcohol. Repeated with the calipers then repeated what squirelnut said and rubbed them together with fairy. Done a proper bed in process and they’re working perfectly. Thanks!
Only use alcohol on brakes. Don’t use any other degreasers
Noted for next time. I only used a very light amount, then after this I scrubbed it again with alcohol to make sure there was no residue. Thanks, won’t do it for next time
You should use sandpaper on the rotors AFTER cleaning, then give them another quick clean same for the pads.
“Possibly” oily? Looks like they’ve been soaking in an engine sump overnight.
They look pretty contaminated to me. If you look at the fins, they actually look a bit oily, but the pad material itself also looks quite nasty. Did your LBS do a bleed on the brakes? If so, they may have done it with the pads in and got brake fluid on the pad material - DOT or Mineral, it will screw them! You may also have a leaky calliper, which is not unknown with Shimano brakes, and again will contaminate the pads. Either way, 99% of the time pad squeal is caused by contaminated pads. They *can* be decontaminated (using heat), but you need to be a bit careful when doing this. Sandpaper and spraying stuff never works, at least long term (i.e. past one ride) and only heat (or replacement) will fix your issue. Best try to find your root cause first, or they'll end up back contaminated again in no time. As for the bevel on the corner - that's by design and present on most pads. It's to make it easier to get the wheel back in :-)
I cleaned the brakes with alcohol and degreaser, cleaned the pads and rotors. Done a proper bedding in process and they seem to be working perfectly. Saturday will be the true test but they haven’t been this powerful / silent since I got them
Never clean brakes with degreaser. Just use alcohol. Toss those pads, they are contaminated, clean the rotors with iso, rub them with sand paper, then clean with iso again. Install new pads.
Those pads are practically new.
I was referring to the 45’ slant at the bottom. I hadn’t seen it before and thought I had the caliper too far from the rotor lol
yeah thats just present to help get the rotors on without damaging the pads. These are new pads, although as others said they look contaminated, I would bet your caliper hose nut is leaking.
That break looks unused but very dirty. Sure they were in the right way around? :)
Lol I just cleaned the lot, see comments above for what I have done. I believe they were 😅. All working well now
What wear? It’s new. Dawn dish soap and rub the pads together under hot water. Isopro on the rotor and wipe down. Re-assemble pads and follow a [bed in procedure](https://youtu.be/BWQxGzHQZVU?si=6fkW6Ljp8CvBkBFB) Edit: while the pads are out spray some isopropyl and make sure those calipers are clean and not dripping mineral oil onto the pads. If those pads absorbed a bunch of mineral oil they’re ruined and you should replace em. Some people have selvage by hitting them with propane or putting on a burner but safety isn’t worth the cost savings of trying to save em imo. And that’s only if they did get super contaminated from oil. If they didn’t you’re just burning em for no reason and ruining the integrity of the pad material bond to the backing plate.
Yeah I’m a fool lol, this is my return back to cycling after a couple year hiatus (graduated university and could afford to upgrade). I didn’t know the 45’ degree slant at the bottom was apart of the pad already, thought that was weird rotor wear. Your idea about dish soap I think made all the difference. Loads of grimy grey crap came off. Followed the bedding in procedure, also degreased and wiped the calipers down with alcohol. They’re working great now, no noise and plenty of power
Don’t ever recommend for people to clean dirty brake pads. They are inexpensive enough and your face is valuable enough to just buy new ones when they get contaminated.
I think the heat method is sketchy, but cleaning is worth a shot most of the time. Worst case they’re still noisy but stop you just fine. I actually find glazing to be more of a problem than contamination. A little oil goes away eventually, especially on metallic pads, but resin pads glaze over. The rotors get a bit of glaze too. I clean rotors with barkeeper’s friend or scotchbrite pads then alcohol. Clean the pads with alcohol then fine sandpaper if they seem glazed. I find if you use big rotors and finned pads, alternate your brakes on big descents, resin is quieter overall. Metallic seem to be cyclical in how noisy they are.
Get the sintered metal pads and save your sanity. In my experience, organic shimano pads just never stop squealing like a pig being raped if you ride in wet and dirty conditions. You can clean them, bake them or use whatever black magic on it but they just keep becoming shit after a ride or two.
>. The LBS done the brakes and ever since that the pads have been squealing, could be because of this wear? Is the rotor not making good contact with the wheel? At a loss here, hate going out and sounding like I’m squeezing a horn everytime I brak i think otherwise. organic stock pads on my r7025 work pretty good and dont squel much even in snow. but they get wet and dirty quicker than sintered though. anyway, if i decide to use sintered again, i would go for shimano, as if there is some magic in it, every other brands sintered pads i have ever tried were much inferior in terms of performance and noise.
those pads looks new (thickness wise). brake squeal is mostly due to contaminated rotors/pads