Federal stance cassette hubthe federal stance cassette hub builds on the success of federals freecoaster hub and features a tough 14mm crmo axle fully sealed bearings and plastic hub guards these guards not only protect the hubs flanges they ensure the sprocket and chain are well covered as youre grinding the rails features material hub shell 6061 t6 aluminium holes 36h axle 14mm crmo cones crmo threadless hub guard specific nuts aluminium driver 9t teeth size 12x18 bearing