Rotor Kapic Mountain Bike CranksetThese superb crank arms are specifically designed for use with your MTB. Additionally, their ultra-stiff construction is perfect for tackling everything from rocky climbs to forested singletracks, and thrilling technical downhills. This lightweight and durable model is the perfect replacement for those who need tough cranks for tough rides.Features: Material: 6082 Aluminium Use: MTB Spindle: 30mm Compatibility: BSA; Press Fit 30, 4130, 4630; UBB30 Weight: 355g (170mm model)Buy Rotor Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.