Fulcrum Racing 4 Rear Wheel - 700, QR x 130mm, Rim Brake, HG 11, BlackThe profile of the Racing 4 wheel is a winning combination of great appearance and great performance. This medium profile makes all the difference on the flats at cruising speeds, but is no less excellent uphill, with agile and powerful relaunches. 35 mm profile aluminum rim with turned braking surface Stainless steel, double butted, aero straight pull spokes Oversized flange aluminum hub with QR axle Product Specifics Rim Width (Internal): 23 Defined