The 5DEV Centerlock Rotor Lockring is a lightweight, CNC-machined lockring designed for tight-clearance disc brake setups. Made from titanium with a stainless steel shim washer, it provides secure rotor retention at just 9 grams. The slim internal spline design allows use with cassette-style lockring tools and fits both 12mm thru axle and quick-release hubs across road, gravel, bmx and mountain bikes. Ultra lightweight at only 9 grams 40mm outside diameter Compatible with rotors up to 220mm Internally spline with a 40nm torque spec 5Dev Titanium Lock Ring Disc Rotor Parts and Lockrings UPC: 850076919856 MPN: T-CLN-INT-51