• Compatible with rotary Hub
• [Material]: High strength steel, Nickel-plated finish offers hard wearing resistance to corrosion
• [Detail]: High precision internal thread ensures close connection with bicycle hub. Smooth rotation and easy maintenance. Hollowing technology to further reduce weight without reducing rigidity,make riding lighter.

Don't know whether you should choose Aluminum Cassette/Steel Cassette or Freewheel? Read  before purchasing>>