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Lightweight 2-speed shaft set S989 / S990
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.
