Features1Relibale Performance: The bike crank arm set adopts CNC precise milling, with high strength and accuracy. It can perform high intensity operations such as mountain climbing and off road driving, with uniform force distribution and smooth cycling. 2Fine Machined Tooth Patterns: The bike crank arm set features precise machined tooth patterns and a multi stripe fixation method, making the crank force more direct. 3Aluminum Alloy Material: The bike crank arm set is made of aluminum alloy material, which is lightweight, corrosion resistant, abrasion resistant, and durable. 4Strong and Impact Resistant: The surface of the aluminum alloy bicycle crank arm set is anodized to effectively protect the aluminum alloy body. 5Internal Weight Reduction Design: The mountain bike crank arm set features a weight reduction design inside, making the crank weight even lighter.SpecificationItem Type: Mountain Bike CranksetMaterial: Aluminum AlloyWeight: Approx. 835g / 29.5ozPackage List2 x Crank Assembly1 x Bottom Bracket8 xChainringBolts2 x Bottom Bracket Accessories