Catching disc brake
GHill
Posts: 2,402
I recently received a Specialized FSR XC Comp as insurance replacement for a stolen bike.
On the return leg of my first ride I noticed that the rear disc (Hayes Stroker Trail) was starting to catch on the pads at a certain point as it revolved and the noise it made seemed to get louder and louder. As far as I can tell the wheel itself is still true, which I guess means that the disc is out of alignment. As the only ride I've been on was along a very flat cycle path I can't see how I could possibly have bent it.
This made me wonder if it hadn't been assembled correctly, the Hayes instructions seem to indicate you have to be careful about which order the bolts are tightened in and with how much torque. I decided to try taking the disc off but I can't shift the bolts. At first I tried with a torque wrench but no joy so I just tried a standard T25 key and I could feel the head starting to round with no movement of the bolt. Does this mean some thread locking compound was likely used?
If thread locking has been used is there any point in me taking this to a shop to see if they can fix it? Any other advice for possible solutions? It would be a pain to have to try to get the insurance replacement company try to sort it out, so I'd rather leave that as a last resort.
Thanks in advance.
On the return leg of my first ride I noticed that the rear disc (Hayes Stroker Trail) was starting to catch on the pads at a certain point as it revolved and the noise it made seemed to get louder and louder. As far as I can tell the wheel itself is still true, which I guess means that the disc is out of alignment. As the only ride I've been on was along a very flat cycle path I can't see how I could possibly have bent it.
This made me wonder if it hadn't been assembled correctly, the Hayes instructions seem to indicate you have to be careful about which order the bolts are tightened in and with how much torque. I decided to try taking the disc off but I can't shift the bolts. At first I tried with a torque wrench but no joy so I just tried a standard T25 key and I could feel the head starting to round with no movement of the bolt. Does this mean some thread locking compound was likely used?
If thread locking has been used is there any point in me taking this to a shop to see if they can fix it? Any other advice for possible solutions? It would be a pain to have to try to get the insurance replacement company try to sort it out, so I'd rather leave that as a last resort.
Thanks in advance.
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Comments
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Wash the bike and see if it still does it. Usually there is some wobble in the rotor and when it gets mucky it rubs at certain points. Check it's not that before you take it back. Also check your rear wheel is right into the dropouts."Internet Forums - an amazing world where outright falsehoods become cyber-facts with a few witty key taps and a carefully placed emoticon."0
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I'll try both of those.
Thanks!0 -
I decided to have more of a poke about and discovered that the clip on the back of the pad wasn't attaching to the piston correctly. It meant that the pad moved around a lot and would "flop" onto the disc.
A new set of pads sorted it.0
