Brake pads disappeared after about 200 miles
- Thread starter Craig321
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Soldato
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i'd replace that it looks likes its scrap
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From the photo, I'd replace it, but if in doubt nip over to a local mechanic who you trust and ask for his advice.
That disc has well had it and looking at the wear yes the brake has been stuck on, the inner bit looks like stuck pad material, I bet if you put a wire brush to it most of that would come off, but it looks like there is a big lip at the top, and its not consistent all the way around so maybe warped also? if you spin the wheel whilst looking from behind at the disc you should be able to see if its warped.
Rear discs are cheap for most bikes so shouldn't cost too much to sort out.
Does the piston move easily now it has been cleaned?
Sticking rear calipers are a hilariously common problem on so many bikes simply because they don't get used that much, as someone else said the feel is rubbish
and on many bikes the design is horrible, upside down so all the crud just sticks inside the caliper! 
Rear discs are cheap for most bikes so shouldn't cost too much to sort out.
Does the piston move easily now it has been cleaned?
Sticking rear calipers are a hilariously common problem on so many bikes simply because they don't get used that much, as someone else said the feel is rubbish
and on many bikes the design is horrible, upside down so all the crud just sticks inside the caliper!
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Really? I wouldn't even consider using that disc, it's scrap. Just look at the depth of the lip for starters.
As someone else mentioned the lip doen't look even, and it's so deep in one pic I'd be surprised if it wasn't below minimum thickness (MOT failure).
You won't get all those deposits off with a wire brush either, no chance. A linishing disc in an angle grinder maybe...
You won't get all those deposits off with a wire brush either, no chance. A linishing disc in an angle grinder maybe...
Soldato
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I still cant believe you didn't feel anything, it must have been binding
That disc has well had it and looking at the wear yes the brake has been stuck on, the inner bit looks like stuck pad material, I bet if you put a wire brush to it most of that would come off, but it looks like there is a big lip at the top, and its not consistent all the way around so maybe warped also? if you spin the wheel whilst looking from behind at the disc you should be able to see if its warped.
Rear discs are cheap for most bikes so shouldn't cost too much to sort out.
Does the piston move easily now it has been cleaned?
Sticking rear calipers are a hilariously common problem on so many bikes simply because they don't get used that much, as someone else said the feel is rubbish
I've not put the piston etc. back in yet as I only took it off on Sunday afternoon to clean and it's dark when I get back from work so haven't had the chance to bleed etc. yet... will sort it all this weekend when I have the disc and pads.
I know! It's weird. I mean, yeah of course I noticed when the pad was pretty much gone, but no indications before that. The bike has been running better than ever since I replaced the chain and sprockets and the rear brake was way better than the old organic I had on there.
I also checked every time I got off the bike for a few days after putting the new pad on and it was perfect. I guess it could have started binding on Friday/Saturday when I did a good few hours riding. No noises or anything though.
Anyway, decided to go for a new disc and matching pads - both EBC, recommended ones from m&p. Also had EBC previously on the pad and it lasted 2 years.
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Its not that it's not as important as the front brake, it's the fact that if you t bone a smidsy, then given the way insurance companies are these days, the other drivers insurance co could well use it to cut any personal injury payout cos your bikes got a shot rear disc, frankly, ide rather not give the devious sods the excuse.
I'm always amused/interested to hear when people 'don't use' the rear brake. Do you all stop with a nice fork dive? What about traffic work? I learned to use the rear on the DAS and never stopped.
Also, hilariously ruined discs. How anybody could think they are fine... sheesh! Maybe the discs were already screwed and causing the pads to wear?
Also, hilariously ruined discs. How anybody could think they are fine... sheesh! Maybe the discs were already screwed and causing the pads to wear?