Originally Posted by illdthedj

does anyone know about typical BCDs for 3 bolt cranksets? IE....were there a ton of varying BCDs, or just a few common ones....on ebay i saw an 85mm BCD chainring, and i think mine is 106 (or at least going by sheldon brown's calculation, 101mm x 1.1155)

i ask because this one chainring this non-communicative seller has LOOKS like the correct size, but if i hear from someone here "oh yah theres basically only 2 main 3 bolt chainring BCDs" then i might pull the trigger...