TRP EVO Alloy Cranks Durable and Lightweight If you're looking to enhance your pedaling power, a robust crankset will help a lot. The TRP EVO Alloy Cranks feature a durable and robust forged aluminum crankarm construction for strength and have a 30mm spindle to provide exceptional power transfer. It is designed to be used with frames that have 68mm or 73mm bottom bracket shells. Features Durable and robust forged aluminum crankarms provides strength and are lightweight30mm spindle diameter is torsionally rigid for exceptional power transfer For use with frames that have 68mm or 73mm bottom bracket shells Chainring and bottom bracket are sold separately SPECIFICATIONSSpeeds12-Speed BB Compatibility68/73mm Chain Ring Sold Separately (Direct Mount)Crank Arm Length165, 170, 175mm BB Spindle Interface30mm Chainring Material-Bolt Center Diameter (BCD)-Crank Arm Material Forged Aluminum Chainline49/52mm Bottom Bracket Included No Intended Use Mountain Weight TBD | Trp | Evo Alloy Cranks | Black | 165Mm | Aluminum