Lightweight 2-speed shaft set S989 (SER903810)

The new lightweight shaft system saves a lot of weight, 10g in total! This is a very substantial weight saving, especially on a spinning part.

On top of this there is a new way to assemble the 18 teeth pulley. The new adapter is screwed onto the shaft and runs ultra-true!
It’s hard anodized surface means that it has an extremely low wear as well.

This 2-speed shaft system is proven by our factory team and was used at last years races already.

To unscrew the pulley adapter, you need a 10mm open-ended spanner and a 3mm allen key.