The 101 is the world's most aerodynamically advanced aluminum wheelset, the all-new Zipp 101. It's the most affordable way to take advantage of Zipp's cutting-edge aero technologies and premium build quality. The 101's centerpiece is the first fully toroidal aluminum rim, developed in the wind tunnel with a proprietary profile curve extending across the braking surfaces. With this patented design, the 30mm-deep 101 can exceed the aerodynamic performance of V-shaped rims with much deeper aero profiles. Rim Type: Alloy Clincher (101 rim) Rim finish: Polished Hub Spec 88188 18 front and 20 rear Sapim CX-Ray spokes Weight Front: 705g, Rear 818g Aerodynamics - time and watt savings over 40K for 101 wheelset: 42 seconds 14 watts.