The Lightning Bolt-On Axles offer a low profile and lighter weight alternative to conventional thru axles with levers. Features: Available front and rear Lightning Bolt-On axles offer a stronger, more durable, lower profile and lighter weight option to replace your stock thru-axles No more bulky handles to strike trail obstacles. Aerodynamic design Internally bored to remove unnecessary material without compromising strength Require a standard 6 mm hex wrench for easy installation and removal Manufactured in the USA to the tightest tolerances using aerospace materials and CNC manufacturing Length 161mm with tapered spacer or 167mm with flat face Specs: Axle Diameter (mm)12 Overall Length (mm)161/167 Thread Length (mm)17 Thread Pitch12 x 1 ColorBlack Weight42