Hope's lightweight Pro 4 Fatsno 177x12mm rear disc hub represents the next benchmark in disc hub design with performance and durability capable of handling your aggressive style. The hub body is machined from a solid billet of aluminum and features high-quality sealed Stainless Steel cartridge bearings and a 6-bolt, ISO disc rotor mount. The hub's one-piece, 7075 aluminum freehub body has 4 pawls that engage the 44 tooth steel ratchet fixed into the hub shell and sealed with a frictionless, non-contact labyrinth seal. Shimano 9/10/11-speed compatible, convertible to SRAM XD with driver body (purchased separately). Special Note: Due to the nature of anodization processing, slight variances in color may occur. Cassette Body: 9, 10, 11- speed Shimano Hub Spacing: 177x12mm Spoke Drilling: 32 hole Weight: 367 grams Thru-axle not included