The Answer Power Booster Senior Clipless Pedals feature a lightweight alloy cage with large platform for extra grip, dual-sided entry with adjustable spring tension, chromoly spindles rolling on precision sealed bearings for greater reliability and Shimano SPD compatible cleats. Features: Lightweight alloy cage Shimano SPD cleat compatible Clipless system with platform for additional support Adjustable spring tension Precision sealed bearings Specifications: Pedal Type: BMX Race Cleat Interface: Shimano SPD Cleats Included: Yes Pedal Clips: Dual-Sided Clip In Pedal Configuration: Clip w/ Platform Body Material: Aluminum Spindle Size: 9/16" (Standard) Spindle Material: Chromoly Steel Bearings: Sealed Color: Black/Silver Weight: 14.7 oz (Pair)