MTB niggling brake issue

[8potdave]

After my pads wore out I decided to upgrade to some uberbike sintereds. The pads are very sharp and work well however I have a small annoyance with them. They seem to rub on occasion whilst out riding. I have had the bike on my workstand, spun the wheels and no drag what so ever. However 5 minutes into a ride I get the 'ting' 'ting' noise as though they are catching. I've had the pads out, cleaned everything up and replaced and they are fine on the stand until I go out again!

Strangely after a ride today on some very rough and muddy terrain the noise went away. I'm thinking these pads might be worth changing as although it doesn't affect my riding it gets on my nerves! Any suggestions?

[broster]

Iv seen this before and it was the disc which was the problem, who very changed the pads used a screwdriver to push the pistons back in and levered off the disc which caused the problems

[nammynake]

I always 'reset' the pistons by using a screwdriver to push the OLD pads outwards before fitting new ones - don't do this with new pads!!!

If that doesn't cure it then try realigning the callipers - undo the Allen bolts so that the entire calliper housing can be moved by hand. Hold the brake lever closed to centre the calliper and then re tighten calliper bolts. This is quite trial and error but eventually you will end up with a calliper positioned such that the pad sits dead centre.

[lufbramatt]

Probably a slightly warped disc and/or a slightly sticky piston that isn't retracting properly.

[Gren]

Have you tried aligning the calipers? Mine does that sometimes but only when riding, especially climbing when the added strain will mean the frame/wheels/whatever flex a little.

2 minute fix and worth trying.

[Justin S]

Sometimes caused by flexing of the hub/ forks etc. Also the pistons maybe starting to stick rather than retract fully, so clean the caliper and lube and exercise the pistons. Also maybe the fluid is needing a change, as slight hydroscopic may case the system to bloat a little.

[8potdave]

Thanks chaps, think I will give them a full overhaul - swap the pads, realign, change the fluid etc. Only had the bike 9 months and done around 1000 miles on it so could be due a fettle.