ODYSSEY Quartet Hub Black 9t Driver RHD Hub collars feature integrated 14mm frame slot adaptors 6902RS sealed cartridge ball bearings 9-T driver, 3-Pawl singular spring design and precision caged needle bearings, compatible with V1, V2 and V3 cassette drivers 6061-T6 forged aluminum hub shell 3/8?, 4130 chromoly axle bolts w/15mm 4130 chromoly female axle