Changing a Sprint Boost 90T Freehub Body

THIS GUIDE REFERS TO A FREEHUB BODY SWAP ON the following wheelsets:

• HUNT Proven Race XC UD Spoke Carbon Wheelset
• HUNT Proven Carbon Trail H_Core MTB 29 Wheelset

Need to order the parts featured in this guide? Head to our Spares page here. Our guide to using the Spares Finder is here.

1. Remove the wheel from the bike and remove cassette if fitted.
   
   
2. Pull the drive side end cap from the axle – no tools are required.
   
   
3. The freehub body this simply slides off the axle. When removing ensure all six pawls are in place and seated correctly.
    
4. Make sure you retain the silver spacer behind the freehub body this needs re-fitting before re-installing the freehub body.
5. To service the freehub mechanism clean the ratchet ring and the pawls of the freehub body with a dry microfibre cloth and lubricate with a thin layer of lightweight grease.
6. Fit the silver spacer onto the drive side of the axle and the freehub of your choice.
   
   
7. Push the adaptor/end cap back on to the drive side of the axle.
8. Ensure that the adaptors are fully pressed home to ensure proper fit and prevent any lateral play.