Includes Front and Rear Wheelset, Front and Rear QR Skewers, 2 rim strips Specification Front Rear Rim Alloy Clincher (Compatible with rim brakes) 40mm Profile (451/406) / 30mm Profile (349/355) French Valve Spoke DT Swiss Champion Spokes Alloy nipple 24H 2Cross Hubs 2 bearings O.L.D.: 100mm IS 6-bolt Rotor Mount 4 bearings O.L.D.: 135mm IS 6-bolt Rotor Mount Compatible with 8/9/10/11SPD* Shimano / Sram Cassette *See Size Weight 349: 355: 406: 750g(±50g) 451: 800g(±50g) 349: 355: 406: 800g(±50g) 451: 900g(±50g) The wheelset should be trued for every 4,000km / 1year. Total weight over 105kg will shorten the time span between services. How to measure your frame and fork O.L.D.? O.L.D. = Over-Locknut Dimension Remove your wheelset > Measure the opening size of the front/rear fork(inner width) O.L.D. Sizing Guide Front 100mm for most bikes with either rim brakes or disc brakes 74mm for some folding bikes with rim brakes (Dahon, Oyama, Fnhon etc.) Rear 130mm for most bike with rim brakes 135mm for most bike with disc brakes