Features: Wide Compatibility: This bike hub is compatible with 8/9/10/11 speed mountain bikes and is easy to install. High efficiency and good sound transmission. Simple Installation: The aluminum alloy hub adopts 5 bearings and 32 holes design which is convenient to install and disassemble. Whether you ride in the street or cross-country you can be full of passion. Long Service Life: This bicycle hub is mainly made of aluminum alloy which is durable and not easy to damage. Good Performance: The wheel hub of this bicycle is designed with 120 teeth which can bite tightly and reduce the loss of force. All aluminum alloy numerical control precision technology disc brake ultra light. 1 Pair: This bicycle hub set contains a front and rear hub so you can use them to replace the front or rear hub or both hubs. Specifications: Material: Aluminum Alloy Color: Black Red Note: Due to different computer resolutions there may be a little color distortion. Due to different hand measurements there may be slight errors. includes: 1 PairFront Rear Wheel Hub