I have owned loads of maguras, a dengura and now i have a bb7, Out of the lot i prefer the bb7 on the rear because the braking power is a lot more than on most rim brakes and they are very bitey but also give alot of modulation and smooth braking. yes it will probably rape my frame, but i dont care, just keep buying frames with a disc mount or more toxsin 2s As for wheels i dont think it will effect them at all. Havnt hit my disc yet (203) and ive been sidehopping to the left and riding natural.