GSI AH50 Hub Extension

The AH50 brings your wheel 50 mm closer, an easy way to fine-tune reach and arm angle without moving your base or seat. Both faces use the 70 mm bolt pattern, which GSI designed to work with direct drive bases across the market, and the compact 82 mm body stays tidy behind the wheel.

One face has threaded holes and the other has through holes, so you can mount it in whichever orientation your wheel and base call for. It is precision-machined from billet 6061 aluminum and weighs just 0.1 kg.