The Box Edge Hub Lock Ring is made of extruded and CNC-machined from 6061-T6 aluminum resulting in a lightweight and beautiful piece. Replace that old steel lock ring you have now and save some weight while adding style and color to your whip. Available in anodized red, blue, gold and black to fit Shimano-compatible cassette bodies. Keep in mind, aluminum is softer than steel, so use care when installing an Edge lock ring.

• Outside Diameter: 43.6mm
• Weight: 7 grams / 0.25 ounces