Mavic Aksium 700C Rear Wheel Designed with features and technologies that are typically reserved for premium race wheels, Aksium delivers quality performance for everyday road riding. Features include straight-pull spokes for added strength and stiffness, and lightweight rims for a lively ride quality. The rims are now wider, which allows for increased air volume and a better fit for larger diameter tires (up to 32mm). The hubs are incredibly tough, delivering high mileage and long-lasting dependability. And the QRM bearings are the smoothest in the category. It all adds up to a wheelset that delivers the high-quality ride that Mavic is known for. Specification Quick Release only Freewheel: Shimano/Sram, convertible to Campagnolo with optional driver body ETRTO size: 622x17C Internal width: 17mm Material: S6000 Aluminum Tyre: clincher, recommended tyre sizes: 25 to 32 mm Max. Pressure: 23mm 8.7 bars - 125 psi, 25/28mm 7.7 bars - 110 psi Brake track: UB Control ASTM CATEGORY 1 : road only Manufacturers published weight: Rear without tyre, 995 g Spokes (20): Straight pull, round (front and rear non drive side) and straight pull, flat (rear drive side) Lacing: radial rear non-drive side, crossed 2 rear drive side