Chances are good that, if you're buying a deep carbon rim, you've got a pretty specific purpose in mind. While the 48 Aero wheels are billed as Reynolds' do it all hoops, going whole hog to the 58 Aero Carbon Wheelset is the best bet for any road racing warrior who isn't looking to make a name in the KoM competition. Reynolds works hard to set the 58 Aero apart from the horde of mid depth carbon rims, and the key to achieving distinction is what the Utah based manufacturer calls Dispersive Effect Termination DET. DET Begins at the rim bed with a maximum width of 26. 2mm, 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 head wind. In reality, you spend 95% of your riding time between 0 and 20 degrees of yaw with a wind angle anywhere from 0 to 100 degrees in relation to the bearing. A lot of deep rims in this situation act as sails, pulling the bike sideways during sudden changes of direction in windy conditions an effect that's far more noticeable when the rims get over 50 millimeters deep. You're choosing a deep rim because you want the aerodynamic benefits, but poor handling can make any speed gain come to nothing if you're thrown off the road or into another cyclist by sudden gusts. While it's impossible to completely cure this ailment, Reynolds' rim shaping DET distributes side forces read: cross wind so that the center of pressure is pushed bey...