Profile Design T5 Aluminum Aerobar. Cheat the wind and lower your PR with all the aerodynamic excellence of the Profile Design T5 Aluminum Aerobar. Line up for your next time trial or triathlon bike leg with confidence that you'll be fully equipped to pedal fast against the clock. This clip on aerobar is part of Profile Designs' superb T series, and its ultra shallow, 15 degree extension bend maintains the high performance aggressive position of straight extensions with the comfort of a ski bend. The extension itself is construction of aluminum and can be adjusted in length from 125mm to 275mm. Furthermore, there's an additional world of adjustability to fine tune one's aero position courtesy of the J2 brackets and F 19a aluminum armrests. And for maximum versatility, the aerobar's clamp is compatible with both 31.8mm and 26.0mm bars.