Originally Posted by
colotandem
The Magura you linked was 180mm, but
it available in 203 mm? Magura has some interesting rotors.
The Hope is also 203 mm.
I figured that increased
diameter was what I needed, as our limitation was disc heat capacity and dispersion, which requires rotor surface area, and surface area increases with the square of the radius (A = πr2).
Originally Posted by
colotandem
I am looking to try the 2 piece rotor with the Avid BB7 on our Calfee, we'll see how it goes. The two piece rotors have a much greater tolerance to warping.
I like the idea of a two piece rotor, as the aluminum spider is lighter, has better heat conduction, and can be anodized in fetching colors. I have seen it
asserted that warping is reduced, and we have certainly put the Formula to the test in that regard, but I haven't seen the
proof that a two-piece is less warpage prone.