Originally Posted by
dscheidt
It's been a long time since I've touched BBDB brake, bur as I recall, the difference is the BBDB is one piece, the inner adjuster is different, some of them used a goofy sized rotor, and they have magnets to hold the pads in place instead of clips. The mechanics of how they work is the same, so instructions for a bb7 should be largely the same. They're pretty simple.
The only difference between the BBDB and the BB7 is the rear adjuster. The BB7 added a bolt for a 4mm Allen wrench to make them easier to turn. They use the same pad as a BB7...the one with two hooks on the top...and they are held in place by a spring clip on the top of the caliper. They are adjusted the same as the BB7.
The magnetic pad holder is in the BB5 (I think) and they are generally awful.