BBB Steering Tube Adapter
1 1/8" BHP-21
This adapter will allow you to use an A-head (threadless) bar stem on your 1" threaded headset system.
22.2mm quill diameter
25.4mm stem fitting
This adapter will allow you to extend the height at which you can affix the bar stem on a threadless 1 1/8" headset system.
25.4mm quill diameter
28.6mm stem fitting
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying.