Fox

Piston Shaft, 9mm, 8.5x2.5"

Fox Piston Shaft service replacement for Fox rear shocks, sized 9mm with an 8.5 x 2.5" configuration. This is the core damper-side shaft hardware used during shock service to replace worn, scored, or damaged internals and restore consistent damping performance and sealing reliability after a full rebuild.

• OEM-style service part - Designed as a direct replacement piston/damper shaft for compatible Fox rear shocks, supporting a proper, like-new damper rebuild
• 9mm shaft diameter - Matches the required internal fit for shocks built around a 9mm damper shaft, helping maintain correct bushing and seal interface
• 8.5 x 2.5" sizing - Ensures the correct shaft configuration for the shock’s intended stroke/assembly spec when servicing the proper model
• Rebuild-focused replacement - Ideal when wear, corrosion, or impact damage makes reusing the existing shaft a risk for seal life and damping consistency