Description of BBB Ahead-Adapter BHP-21 Extender - 1 1/8"
Adaptor that enables you to extend your steering tube without affecting the ahead system. Threaded and threadless headset compatible. Sandblasted black BBB RoundHead included.
Note: The BBB Ahead-Adapter BHP-20 Extender is not drafted for the use on a mountainbike and riding in technical terrain (downhills, jumps, drops).
Furthermore the BHP-21 Extender should not be used on forks with a carbon fiber steerer tube.
Fact Sheet of BBB Ahead-Adapter BHP-21 Extender - 1 1/8"