The Wolf Tooth Components Centerlock Rotor Lockring attaches centerlock disc brake rotors onto centerlock hubs. The Lockrings are compatible with 12mm, 15mm and 20mm thru axles as well as QR. Available in the eight classic Wolf Tooth colors, these lockrings allow you to customize your bike and add a splash of color. Wolf Tooth Centerlock Rotor Lockrings use the industry standard 4 mm thick flange and 44mm outer diameter which is compatible with all mountain bike fork/frames and many road bike fork/frames. However, there are some road bike fork/frames that require a special thinner lock ring and are not compatible. Please verify clearance on your bike before ordering. Features Compatible with 12mm, 15mm, and 20mm thru axles and QR 40Nm max torque Can be installed with Wolf Tooth Pack Wrench Made with 7075-T6 aluminum and machined at Wolf Tooth in Minnesota, USA Specifications: Compatibility: Most Center Lock Rotors Material: 7075-T6 Aluminum With Stainless Steel Shim Washer Weight: 10.5g Color: Black