The Spank Spike Pedals have been a favorite among riders for years, so instead of fully redesigning everything, they stuck with the basics and upgrade the axle shaft to now accept crank boots. Same great performance, with the option for additional crank protection. Features: Slim 12mm concave profile for maximum pedal clearance Chamfered leading and side edges for improved cornering clearance Cold forged alloy pedal body is shot peened and anodized for increased durability Hollow taper CrMo steel axles Sealed bearings and IGUS bushings 10 pins per side in virtual concavity for ultimate grip Crank boot compatible 100 x 100 x 12mm platform Specifications: Platform Dimensions: 100 x 100 x 12mm Platform Material: Aluminum Spindle Size: 9/16" (Standard) Spindle Material: Chromoly Steel Bearings: Sealed Traction Pins: 10 Per Side Color: Black Weight: 412g (Pair)