Atomlab Pimp disc rear-9sp hub, 10x135mm/B-O 32h Axle: 10x135mm bolt-onF/R (Model): Rear (9sp)Holes: 32hHub Color: Black/RedHub Drilling: 32spokesHub/Brake Compatibility: 6-Bolt DiscRear Hub Spacing: 135mmSkewer Included: NA, Bolt-OnWeight: 570g