The SunRace CSMS3 TAY-BOX B cassette is a 10-speed cassette specifically designed for mountain bikes. With a gear ratio of 11-42T, this cassette offers a wide range of gears for various riding conditions. The cassette is constructed from high-quality materials, with an aluminum spider, spacer, and cog for durability and a black anodized finish for a stylish look. The cassette is compatible with Shimano MTB HG freewheels and Shimano/SRAM (GX and X9) 10-speed gears, making it a versatile choice for mountain bikers. At 448 grams, this cassette is also lightweight, contributing to a smooth and efficient ride. Product specifications - Brand: SunRace - Model: CSMS3 - Bicycle type: Mountain bike - Number of sprockets: 10 - Compatible body: Shimano - Gear ratio: 11-42 - Color: Black - Material: - Spider, spacer and locking sprocket: Aluminum / black anodized - Sprockets: Hi-Tensile Steel - Finish: ED black - Weight: 448 grams