This advanced 11-speed SunRace MX mountain bike cassette is perfect for experienced cyclists. It has a metallic silver color and a lightweight design, so you can shift smoothly and quickly. The cassette is made of high-quality materials, with A7075 the largest gears and an aluminum spider. The Drive plus system Fluid Plus ensures efficient power transmission. With a gear ratio of 11-51T, you can easily manage different sites. This cassette is suitable for bikes with HG Spline adjustment. Product specifications: - Brand: SunRace - Model: CSMX80 - Number of gears: 11 - Gear ratio: 11-51 - Color name: silver - Weight: 512 grams - Material: A7075 largest 2 gears, aluminum spider, steel - Type: MTB - Speed: 11 gears - Group: MX - Bike type: MTB