High-Performance 9-Pawl 450 Sound Mountain Bike Hub, 32-Hole Front 2 Rear 5 Bearing 6-Bolt Disc Brake Hub, Compatible with Shimano HG 8-12 Speed and Sram NX SX 12 Speed Cassette Experience the thrill of mountain biking with our high-performance 9-pawl 450 sound mountain bike hub. With a 32-hole front 2 rear 5 bearing 6-bolt disc brake hub, it ensures smooth and efficient performance. Made from 7075 aluminum alloy, it is lightweight yet sturdy. It is compatible with Shimano HG 8-12 speed and Sram NX SX 12 speed cassette. Features: High-performance 9-pawl 450 sound mountain bike hub for smooth and efficient performance. 32-hole front 2 rear 5 bearing 6-bolt disc brake hub for enhanced stability and control. Made from 7075 aluminum alloy for lightweight durability. Compatible with Shimano HG 8-12 speed and Sram NX SX 12 speed cassette for versatile use. Available in black, dazzling, and purple colors for a stylish touch. Specifications:  Material: 7075 Aluminum Alloy  Color: Black, Dazzling, Purple (Optional)  Compatibility: Shimano HG 8-12 speed, Sram NX SX 12 speed  Cassette Hole Count: 32  Bearing: Front 2, Rear 5  Sound: 450  Front Hub Size: 100x9cm / 39.4x3.5in  Rear Hub Size: 135x9cm / 53.1x3.5in  Weight:  Front 180g / 6.3oz,  Rear 360g / 12.7oz,  Total 540g / 19oz Package list:  1 x Pair 9-Pawl 450 Sound Mountain Bike Hub