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coventry_eagle
I have just got my first ever disc brakes bike, a Marin Four Corners with TRP Spyre mechanical 160mm brakes.
Each side of each caliper has a 3mm allen key port for adjusting the pads in and out. Presumably these are used to centre the pads on the rotor and adjust the lever pull?
One of them, on the rear caliper will not turn, either way, even with a near worryingly large amount of torque. The other three turn effortlessly.
Any idea what might be up with it?