Box One aluminum hub lock ring

The Box One Locknut is extruded and CNC machined from 6061-T6 aluminum, designed to be extremely lightweight. Replace your current old steel lock nut and save weight while adding style and color to your bike. Available in red, blue, gold and black anodized to fit Shimano compatible cassette bodies. Keep in mind that aluminum is softer than steel, so use caution when installing one of these locknuts.