The Box One Stem Lock 1-1/8th Inch is a CNC-machined black metal bicycle axle with "box one" on the end, featuring a cylindrical shaft and hexagonal end cap for secure stem lock or steerer tube compatibility.

Highlights

Fits: Straight 1-1/8" steerer tubes
Steerer: 1-1/8" straight
Material: 7075-T6 (post), 2014-T651 (base)
Weight: 61 grams, 72 grams

For straight 1-1/8 inch steerers
Insurance against a broken steerer
Cold forged then CNC machined
7075-T6 post, 2014-T651 base

Description

Box Components stem/steerer lock suitable for straight 1-1/8th inch steerer tubes. Cold forged and fully CNC-machined from a number of high strength aluminium alloys, Box One Stem Locks offer peace of mind and a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube.

Features

For straight 1-1/8 inch steerers. This one suits straight 1-1/8 inch steerer tubes, so check your fork: tapered steerers take a different lock.
Insurance against a broken steerer. It offers a level of added protection against losing your front wheel and fork legs if the steerer tube lets go.
Cold forged then CNC machined. Box cold forge the parts and fully machine them from high strength aluminium alloys.
7075-T6 post, 2014-T651 base. Two different alloys, one for the post and one for the base, each picked for its job.
Only 61 to 72 grams. It weighs 61 or 72 grams depending on the version, so it adds next to nothing to the front end.