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Sounds like contaminated pads, but check the rotor, wheel and caliper is all tightened up properly too. Proper bedding in after the cleaning/new pads helps too.
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Once you've cleaned them, you need to bed them in again.
Did you do the 5-6 stops from 30kph or whatever bollocks they say?
It's why I don't bother cleaning them these days. Only if they're actually contaminated will I bother cleaning them. The best tactic is to keep them clean as possible to begin with.
snottyotter
hippy
@Ben689908
Morning!
Shimano GRX rear.
Good lever travel (stops 10mm from bar), as pads hit the rotor. Reasonably solid feel - feels like the front which isn’t causing me any problems.
There’s very little bite* between the pads (resin) and the rotor. I have cleaned both using dry wet n dry paper and then Muc Off disc brake cleaner (allowing to evaporate and wiping off the excess).
*the brakes drag, but I can’t lock the wheel up. And there’s squealing if I really try to grab a proper handful**.
Are the pads and disc (either or) contaminated? Can I fix it? Will they bed in following my cleaning them?
Do I need to bleed the brake again?
**ooh matron