what is the size difference between the brake rotor for single piston calipers and 4 piston calipers? and why can't i use the single piston rotors with 4 piston calipers?

 

bump

 

the only reason you can't use the single piston rotors is because of the thickness....

The front's might be comparable but the rears however are the difference between a solid disc and a vented disc...approx. 3/8"

as far as diameter goes, there MAY be a mm difference, but should be (for all intents and purposes) the same

 

yesterday i switched over from single piston to 4 piston brakes. for kicks I compared the rotors, and they appeared to be the same. I didnt look that closely but i am sure they would work vice versa.

 

I'm gonna go with Classic on this one, the vented's must be thicker than the regulars.