Fulcrum

Freehub Body

If your Fulcrum wheel is slow to engage or doesn't engage at all, it's most likely time to replace this wear item. The replacement Fulcrum Freehub Body is compatible with Fulcrum wheels that use 12mm axles with sealed cartridge bearings or OS-type axles with angular contact bearings.

The bodies themselves work with Shimano 8, 9, 10, and 11-speed cassettes along with SRAM 8, 9, and 10-speed cassettes. Replacement is a fairly standard freehub body swap that uses standard tools, and there are exploded diagrams on Fulcrums site for reference.