Mavic Crossmax SLR 29er Disc Material: [rim] Maxtal (aluminum alloy) , Rim Width: 23 mm Front Spoke Count: 20 , Spoke Material: Zicral (bladed aluminum) Spoke Nipple Material: aluminum , Axle Type: [front] 9x100 mm Brake Compatibility: 6-bolt disc, Rotor Compatibility: 6-bolt Weight: 660 g