Box Lock Ring, Alloy

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.

Multiple Tool Design
Extruded Precision CNC
Shimano® Compatible
Anodize Color Finish
Lightweight Design

Outside Diameter: 43.6mm
Material: 6061-T6 Aluminum
Process: Extruded Precision CNC
Finish: Anodize
Weight: 7 grams / 0.25 ounces

What tool should I use to install or remove this lock ring?

To install the lock ring, use Park Tools HCW-5 Bottom Bracket Lockring Wrench. Please note, Park Tools BBT-18 is not the proper tool for this lock ring.

Which side of the lock ring should face the cog?

The lock ring should be installed with the larger, slotted side facing the cog and the smooth side facing the dropout.