The Box One Lockring is extruded and CNC-machined from 6061-T6 aluminum and designed to be super lightweight. 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 one of these lock rings.

Material: 6061-T6 Aluminum
Process: Extruded & CNC Machined
Finish: Anodized
Size/Compatibility:
• Thread Pitch: 1.37 Inch x 24 TPI External
• Tool: Park Tools BBT-9 (or similar 44mm 16 notch BB tools)
• Outer Diameter: 43.6mm
Weight: 7 g / 0.25 oz