The Box One Stem Lock 1 Inch is a black, CNC-machined metal stem lock with "Box One" branded end caps, designed to securely fasten 1-inch bicycle stems.

Highlights

Fits straight 1 inch steerers
Backup for a broken steerer
Cold forged, then CNC machined
High strength alloys

Description

The Box One Stem Lock is a stem and steerer lock for straight 1 inch steerer tubes. It is cold forged and fully CNC machined from a number of high strength aluminium alloys: 7075-T6 for the post and 2014-T651 for the base.

The job it does is simple. It offers a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube. Weight is 61 grams or 72 grams.

Features

Fits straight 1 inch steerers. It suits straight 1 inch steerer tubes only, so check your fork before you order.
Backup for a broken steerer. It adds a level of protection against losing your front wheel and fork legs if the steerer tube breaks.
Cold forged, then CNC machined. Box cold forge the parts and fully CNC machine them, so each piece is finished to shape.
High strength alloys. The post is 7075-T6 and the base is 2014-T651, both high strength aluminium alloys.
61 or 72 grams. Depending on version it adds only 61 grams or 72 grams to the front end.