At 1:35 he's doing 55mph and not even in the big ring, now that's some crazy cadence!
if he is spinning at 120 RPM. and he is in a 39/11 combo his backwheel spins about 420 revs per minute with a circumference of about 7 feet or 2940 feet per minute and in 60 minutes that is about 33 miles per hour. The shot at about 108 shows the big ring and maybe that makes sense.electrik said:
Check out that.... having done some of this before(not at 55mph) I can tell you the largest issue are stones and sand flying off the tires!