Fox Suspension 32 Step Cast CSU

The CSU is the upper assembly of your suspension fork, consisting of the crown, steerer tube, and stanchion tubes. You typically replace this unit if your stanchions are scratched or damaged, or if you need to change your steerer tube length or offset.

This unit is designed specifically for Fox 32 Step Cast forks with 32mm stanchion diameters. You must match the wheel size (27.5 or 29 inch) and ensure your current fork chassis is a Step Cast model to guarantee a proper fit.

Yes, swapping a CSU is a significant service procedure that requires a hydraulic press to safely remove and install the stanchions into the new crown. We strongly recommend having a professional suspension technician perform this installation to ensure structural integrity and safety.

If you are replacing a damaged unit with the same specifications, your handling will return to factory-fresh performance. If you choose a different offset, it will alter your bike's steering geometry, which can change how the bike feels in corners and at speed.

No, the CSU itself does not determine your fork's travel. Travel is adjusted internally within the air spring and damper assemblies, so changing the CSU will not increase or decrease your fork's suspension travel.