Hmmmm...........last May at the NJ State Championship TT, 24 mph on a dead flat 40k TT. Slight headwind on the way back. Aerobars on a road bike and 60mm HED Stinger front wheel only. Did this TT the day after I finished a 70 miles circult ESQ game race. On my typical off season tempo ride, the fastest was during early Oct. 21 mph for 40 miles on a somewhat flat-ish course/loop. This past Tuesday I did 19.6mph over 47 miles under a somewhat windy condition. Same course. For what is worth I weight 132lb and 5'9"