i couldn't find the front brake caliper piston diameters online, so i went outside and mic'd them. they are 42mm each, x2, in a sliding caliper, so x2 again, for a total piston area of 5554mm^2, or ~8.61in^2. actually, i measured 1.6553", but i couldn't get them perfectly clean, and that's 42.0446mm, so i figure it's probably 42mm pretty close to exactly.
just thought i'd put it out there for those looking to do some brake bias calculations, since i couldn't find it readily.
