Anyone know anything about disc brakes?

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leggy_blonde in reply to @hippy

Have you tried a tiny bit of copper paste on the back of the pads?

What pads and rotors are you using?

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hippy in reply to @leggy_blonde

No, but I did try sanding the back of the pads too, just in case there was some grit there.

Pads were Shimano or some aftermarket thing. I can't remember. One was deffo Shimano and one wasn't but I maybe swapped them before the 24hr. The rotors are Shimano of some sort.

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Sergeant_Pluck in reply to @hippy

Some Shimano rotors are marked “resin pads only” - could compatibility be a factor?

https://shimanobikes-nz.prontoavenue.biz/ts1570079501/attachments/Page/20/Disc%20Brake%20Pad%20Compatibility%20Chart.pdf

In any case, once the pads are contaminated, if it is something that penetrates the pad, no amount of cleaning will help and some solvents seem to just distribute whatever the contaminant is even deeper.

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