The Odyssey C5 Cassette Hub is a strong, drive switchable hub that boasts features way above its price range. Built from 6061-T6 aluminium for the hub shell & paired with a 14mm, 4130 chromoly hollow axle with 6mm hex broaching ensures the C5 is strong & durable while helping to reduce weight. The left side/right side drive 9 tooth driver rolls on three precision sealed cartridge bearings & the hub comes with a replaceable non-drive side hubguard. section Product Specs HUB TYPE: Cassette AXLE: 14mm chromoly male axle DRIVER: 9T DRIVE SIDE: Left & Right Switchable SPOKE HOLES: 36h WEIGHT: 471.7g (1.04lbs)