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I recently bought the Cube Nuroad FE. I features Tektro Spyre C mechanical disk brakes, and I am underwhelmed by their stopping performance, especially on the rear wheel. I am thinking about changing the rotor and the pads, however after inspecting the bike it seems the rotor is not screwed to the hub but actually is riveted to it.
Can somebody confirm this?
These brake discs are Center-Lock discs. The black "spider" that the disc is bolted to is actually a fixed part of the brake rotor (and not the wheel) with these brakes.
On the right of your image, you can see a "CK" and an arrow. Probably, the full text says "LOCK >" and specifies an amount of torque (e.g. 40 Nm). This is the lockring that fixes the disc to the hub, and the text tells you in which direction and how strongly you have to turn the lock ring tool to lock the ring.
Rotors are wear items and therefore must be removable.
The Cube website does not specify what rotors are fitted, but I strongly suspect they are Shimano Center-lock which have a steel rotor riveted to an alloy ‘spider’. They are fixed to the hub with a central lock ring.
Changing the rotor will not improve braking performance, unless you are thinking of replacing it with a bigger one.
