Description <br> Description: <br> 【Functional】: Bike single speed conversion kit can change multi speed bike into single speed bike. <br> 【Premium and Reliable】: Bike chain tensioner and kit packages are made of high quality aluminum alloy and stainless steel material, which is wear resistant, rust resistant, sturdy, and durable. <br> 【High Performance】: Ensures perfect tension for your chain to make you pedal with less effort, suitable for long time outdoor riding. <br> 【Easy Installation】: This chain tensioner kit mounts right onto a mountain bike derailleur hanger to provide a simple, effective, and adjustable way to tension a single speed system. <br> 【Package Contains】: 1 Chain Tensioner, 5 Single Speed Spacer with Lock Ring, 2 Wrench with Spacers, 1 Single Speed Cassette, and 1 Torque Regulator. <br> Specification: <br> Material: Aluminum Alloy, Stainless Steel <br> Package Size16cmx11cmx5cm/6.30inchx4.33inchx1.97inch <br> Package Includes: <br> 1 Chain Tensioner <br> <br> 5 Single Speed Spacer with Lock Ring <br> <br> 2 Wrench with Spacers <br> <br> 1 Single Speed Cassette <br> <br> 1 Torque Regulator <br> Note: <br> 1. Please allow slightly error due to manual measurement. <br> 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. <br> 3. Wish you a wonderful on line shopping! <br>