The sleek new MRP Race Axles give you increased rear-end clearance - especially useful for those who ride tight, technical trails. In some cases, our Race Axles save upwards of an inch (~25mm).Additionally, they weigh in anywhere from 20-50% LESS than the common QR-style thru-axles (Shimano E-Thru, DT-Swiss RWS, and Syntace X12).Lightweight replacement bolt-on rear axles for thru-axle frames.Lightweight alloy construction6mm hex head35-46 g