In our experience, aerodynamic gains from rim depth start to manifest most tangibly at about the 50mm mark. Reynolds' tubeless-ready 65 Aero Carbon Wheelset pushes well beyond that point to offer what may be the deepest profile we'd take to every race. Crits, circuits, out-and-backs, hill climbs--the 65 Aero takes all comers, though it is admittedly happiest on flat courses or while punching through a series of rollers. Aerodynamics are obviously the 65 Aero's primary feature, but the hubs warrant a shout-out before we dip into the aero depths. The new Aero wheels mark a significant departure for Reynolds. We've come to expect DT Swiss hubs on Reynolds wheels; however, these are built with Industry Nine hubs, instead, which up the engagement factor from "responsive" to "virtually instantaneous." Going with I9 also means that the hubs and the rims are all manufactured stateside--the hubs in North Carolina; the rims in Northern Utah. But now to return to those deep rims. Aerodynamics aren't just about depth, of course--the science of speed runs, um, deeper than depth. Case in point: Reynolds' Dispersive Effect Termination (DET). DET Begins at the rim bed with a maximum width of 28mm, which brings the rim up to the tire's width and creates a generous cradle to glue it to. There are myriad benefits to this design, included reduced turbulence, which causes drag, and increased lateral rigidity and comfort. The rim's deep dish is shaped in a NACA-profiled, tapered V-shape that ends with a sharp trailing edge. The Aero's shape smooths airflow over the wheel, and when that air passes the spoke face, it's easily reattached at the rear of the rim to reduce stall. DET also means that this stall-free sweet spot extends to 20 degrees of yaw--a full 7. 5 degrees more than the competition. It's rare to have a real-world circumstance of a straight-on air resistance. In reality, you spend 95% of your riding time between zero and 20 degrees of yaw with a wind angle anywhere from zer..
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