Mountain Bike Hub 6 Pawls Front 2 Rear 5 Bearings Mountain Bike Disc Brake Hub Compatible with Shimano HG 8-12 Speed and Sram NX SX 12 Speed Bike Accessories 6 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 Alloy  Color: Black, Red (Optional)  Compatibility: Shimano HG 8-12 Speed, Sram NX SX 12 Speed  Holes: 32  Bearings: Front 2, Rear 5  Sound: 120  Front Hub Size: 100*15mm / 3.94*0.59in  Rear Hub Size: 142*12mm / 5.59*0.47in  Weight:  Front 155g / 5.5oz,  Rear 323g / 11.4oz,  Total 478g / 16.9oz Package list:  1 x Mountain Bike Disc Brake Hub