Premium Road race pedals with optimized surface area to weight ratio. All models feature: 15 degree release, 3-bolt mount compatible with most road shoes, 5mm lateral float, 2.5mm adjustable Q-factor. RXS Carbon: carbon fiber reinforced composite body and hollow CrMo spindle. RXS Speed: composite body and hollow CrMo spindle. RXS First: composite body and CrMo spindle.