The difference between road and MTB disc brake calipers is the amount of cable pull they're designed to use.
Road disc brakes are designed for the standard cable pull of Campy, Shimano and SRAM integrated road levers.
MTB disc brakes are designed for the standard cable pull of typical MTB brake levers.
The difference between the BB7 and BB5 is that the inboard (fixed) pad of the BB7 is adjustable, where on the BB5 it is not.
My bike has BB7 road calipers and Shimano 105 STI levers. I love them.
Last edited by tsl; 06-26-10 at 11:39 AM.