Rotrex Hub Adapter

This hub adapter is for Rotrex superchargers made before January 2022.

If you use a custom made pulley for your supercharger, it must be made to bolt to the supercharger using this hub adapter.

Most Rotrex superchargers shipped from Rotrex with the standard steel single bolt pulley.   Some Rotrex superchargers left Rotrex with this hub adapter on it intending to use a custom made pulley.

Starting in January 2022 all Rotrex superchargers where fitted with a hub adapter and that must never be removed.

Rotrex has discontinued the steel single bolt pulley.  URD has a significant inventory or the original single bolt pulley made of steel, but once they are gone they are gone.

Rotrex now makes an aluminum 8 rib pulley designed to use the hub adapter.   URD Stocks these new style pulleys.

You can convert your older Rotrex supercharger to use the new style pulley by installing this hub adapter.

Important notes-  This hub adapter will only fit Rotrex C series supercharger made before January 2022.  It will not fit supercharger made January 2022 due to a change in the input shaft that now uses a keyed style interface with the hub.   This hub adapter will not fit the C38R series superchargers.

This hub will not fit the new style input shaft that uses the keyed hub to input shaft interface.  That will need a different hub.  This is only to convert the older Rotrex superchargers that originally shipped with the single bolt steel pulleys to use the new style aluminum pulleys that mount with six small bolts.