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Had a bit of a weekend where all sorts of things seemed to stop working, but what is confounding me above all is whatever the brakes on my commuter bike are doing.
After weeks of putting up with the rear brake squealing like crazy and getting no resistance either from the lever or, even when fully depressed, the brake itself, I finally changed the worn pads.
Now the front and back have new pads, the levers give the expected resistance, and everything seems fine. Even the squealing has gone. Except that the rear brake still doesn't actually stop - or even slow down - the bike.
What's with that?
It feels like it's doing what it should in terms of the resistance it gives when pulled, but there is hardly any resistance at all on the disk even when I pull the brake for a hard stop.
The bike has Shimano disk brakes with BRM447 calipers.
Sounds like the rotor might have some contaminnt on it, like oil
Yeah likely contamination...