Originally Posted by NUTS RuS
The question is about the calipers....
I can put anything from 240mm (as above) upto 305mm on them - so measuring the disc is pointless.
The size of the piston inside the caliper will tell you.
Surely you have to have RST discs to go with RST calipers I.E XR3i discs wont fit with S2 calipers?