Developed in partnership with top aerodynamic research company Swiss Side this wheel has been optimized to sustain the least amount of drag in two key areas; translational drag experienced as bike and rider cut through the air and rotational drag the friction experienced by the wheel as is rotates through the air. Through pioneering rotation simulation in a wind tunnel, using a specifically designed wheel stand to exclude the bearings from testing, DT discovered 25% of overall wheel drag can be attributed to rotational drag. As most manufacturers research and design only for translational drag this is one of the most underrated factors in the aerodynamic optimization of wheels. The rim profile has been aerodynamically optimized so that it is exactly 47 mm deep and 27mm wide, any wider and you’d see an unacceptable increase in drag, any deeper and you’d compromise handling in rough conditions. The 19mm internal rim width is the widest aero rim from DT supporting 25c and 28c tyres perfectly. The lightweight 240 hub body features a Ratchet System 36 freehub fitted to the rear wheel providing a very quick 10º pickup simultaneous engagement mechanism which is light, reliable and easy to service. Every component in this wheel has a considered drag reduction approach no matter how small and insignificant it might seem as evidenced by the internalized spoke nipples that have been specified to reduce the rotational drag by 4%. By approaching aerodynamics in such a meticulous way DT Swiss have separated themselves from the competition so you can to.