Features1Quick-release barrel axle hub for easy installation and removal. 232 holes design for optimal performance and efficiency. 3Made from 7075 aluminum alloy, ensuring lightweight and sturdiness. 4Compatible with Shimano HG 8-12 speed and Sram NX SX 12 speed cassettes. 5Available in black and red to match your style.Specification6 Pawls Front 2 Rear 5 Bearings Mountain Bike Disc Brake Hub. This quick-release barrel axle hub is designed with 32 holes for optimal performance. Made from 7075 aluminum alloy, it's lightweight yet sturdy. It's compatible with Shimano HG 8-12 speed and Sram NX SX 12 speed cassettes.Features:Quick-release barrel axle hub for easy installation and removal.32 holes design for optimal performance and efficiency.Made from 7075 aluminum alloy, ensuring lightweight and sturdiness.Compatible with Shimano HG 8-12 speed and Sram NX SX 12 speed cassettes.Available in black and red to match your style.Specifications:Material: 7075 Aluminum AlloyColor: Black, Red (Optional)Compatibility: Shimano HG 8-12 Speed, Sram NX SX 12 SpeedHoles: 32Bearings: Front 2, Rear 5Sound: 120Front Hub Size: 100*15mm / 3.94*0.59inRear Hub Size: 142*12mm / 5.59*0.47inWeight:Front 155g / 5.5oz,Rear 323g / 11.4oz,Total 478g / 16.9ozPackage list:1 x Mountain Bike Disc Brake HubPackage List1 x Mountain Bike Disc Brake Hub