Mine is incredibly tight with a rear mono trial, the holes have had to be filed oval to actually fit the caliper in the frame, and thats a standard rear caliper with a 180 rotor. Unless the BB7 is an incredibly small caliper, you could't get a 200mm rotor in, unless the post mount adapter thingy moves further up towards the bb with each size you go up, instead of coming straight out like the hope ones. Your best bet is just to ring up Tarty, they'll normally try it out for you with stuff like this, but from this photo below, the caliper is much taller than my mono trial, but in the pic it would have an adapter that's 1 size too big. EDIT: You're all too quick for me! Try a louise, my brothers is fantastic, it has more bite and hold than any Hope I've had, but the lever feel is really stiff and there is hardly any modulation at all.