Swapping one of my Gary Fisher's to Avid BB7's from Avid Single Digit V's. LBS gave me a great deal on the BB7's, but I realized that 1 is a 160mm and 1 is a 185mm. Bike will take either at either end from a clearance standpoint, but from a mechanical standpoint where am I going to benefit from the bigger rotor?

And yeah, I could just go back to the LBS and exchange the 185, but they said the 160's are on backorder so it would be a while..

Thanks.. I'm thinking bigger on the front due to the larger swept area, but threw this out for a sanity check since the arguement can be made that the rear sees heavier braking.

-R