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FSA ®, FSC ® (Phil Wood)
From WikiPedalia
Field Serviceable Axle, Field Serviceable Cassette. Older Phil Wood hubs were pressed together with industrial presses, and required special tools for service/bearing replacement.
In 1992, the axles were designed to be "field serviceable." FSA and FSC hubs can be disassembled with just two Allen wrenches , 5 mm for most models, 8 mm for the track hubs. You stick an Allen wrench into the cap at each end of the axle, and unscrew one from the other to release the axle assembly.
FSA Full Speed Ahead ® is also the brand name for a line of bicycle parts.
