GREAT FOR Indoor BIKES: The pedals are specially designed for Indoor bikes. Strong material: Die cast aluminum body, Extra heavy duty oversized CNC Cr-Mo 9/16" Axle; Smooth riding: sealed bearings. Friendly reminder : Please do NOT use other pedals such as road or MTB pedals on Indoor bikes. <br/>DUAL FUNCTION: Riding with clipless shoes: More efficient energy transfer to pedals or riding with casual shoes. LARGE PLATFORM: The aluminum body is 105 x 78mm relatively large. It ensures more riding stability.<br/>FULLY COMPATIBLE: Compatible with all Shimano SPD MTB pedals system. Means you can use Shimano SPD cleats on these pedals or use these cleats on Shimano SPD pedals. <br/>ADJUSTABLE TENSION: The cleats tension could be adjusted by the screw on the side of the pedal. It allows riders to achieve perfect clip in and out feelings. Package: One set of pedals with toe-clips and cleats. Total Weight: 744g=1.6lbs /pair.<br/>