This advanced SunRace MX 11-speed mountain bike cassette is perfect for experienced cyclists. It features a metallic silver color and a lightweight design, allowing for smooth and fast shifting. The cassette is made of high-quality material, with A7075 largest 2 cogs and an aluminum spider. The Fluid Drive Plus system ensures efficient power transfer. With a gear ratio of 11-51T, you can easily handle different terrains. This cassette is suitable for bicycles with an HG spline fitting. Product specifications - Brand: SunRace - Model: CSMX80 - Number of cogs: 11 - Gear ratio: 11-51 - Color: Silver - Weight: 512 grams - Material: A7075 largest 2 cogs, aluminum spider, steel - Type: MTB - Speed: 11-speed - Group: MX - Bicycle type: Mountain bike