I'm a new guy to disc brakes, and I've searched around but can't come up with an answer. I have a Sojourn that came stock with Avid BB5 brakes, 160mm front and 140mm rear. I'd like to upgrade them both to the BB7s, and would really like to get larger rotors while I'm at it.
Here's the hard to explain part. Is it possible to go from 160mm/140mm to a larger sized rotor on both the front and rear, or am I stuck with the same size rotors that the caliper mounts are already located for? Basically, I just don't know whether mounts are located in different places depending on caliper/rotor size or if calipers are designed differently to be mounted in a universal/standard location.
One more question, an easy one. Are the BB7s no-modding bolt-on replacements for BB5s? I'd love to have the 203mm on both the front and rear, if that's not possible I'm still upgrading to the BB7s in my stock size.
Thanks in advance.