dang Quick... those brakes are tiny. they must weigh very little. and they have plenty of stopping power??
oh and to the OP... I have had BB5's and now have BB7's. I like the BB7's because you can adjust the pads on both sides of the rotor, which you cannot on the BB5's. they work great on my commuter... 55lb bike loaded with 205lb rider.
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Bikes: C'dale, Trek, Cervelo and Santana