I have mountain BB7s on my Bike Friday, 160 disc 406 wheel, I have to be careful.
too much, front, slow speed, braking, and I get thrown off the saddle,
when the bike stops but I don't.
ratio of disc and rim diameter makes these a pretty big disc,
bigger wheel bigger disc ..
a 210?
Last edited by fietsbob; 04-22-12 at 09:58 AM.