Truvativ Blaze left 175 PowerSpline arm Black Chainrings: No ChainringsCrank BB Model: PowerSplineCrank Color: BlackCrankarm Length: 175mmCrankarm Length: 175mmCrankset BCD: Not ApplicableCrnk Clr: BlackPart Description: BlazeSpin: Not ApplicableSpindle Interface Type: TruVativ Power Spline