Robert Axle Project 12mm Lightning Bolt Thru-Axle - Rear Ka-Chow The Robert Axle Project 12mm Lightning Bolt Thru-Axle offers a stronger, more durable, lower profile, and lighter weight option to replace your stock thru-axle. It has an aerodynamic design with no more bulky handles to strike trail obstacles. It's internally bored to remove unnecessary material without compromising strength. Manufactured in the USA to the tightest tolerances using aerospace materials and CNC manufacturing. Features A replacement rear axle that offers a stronger, more durable, lower profile, and lighter weight option to replace your stock thru-axles No more bulky handles to strike trail obstacles Internally bored to remove unnecessary material without compromising strength | Robert Axle Project | 12Mm Lightning Bolt Throughaxle - Rear Length: 163Mm Thread: 1. 5Mm