Tooth range: 11 Speed Wide Ratio Cassette,High-tensile steel plate, finely quenched, tempered hardened, bright gold surface, multi-layer plating anti-rust, high-precision tooth profile, tooth-deficient design, smoother gear shifting, perforated weight reduction, strong compatibility, optimal for terminal vehicles Gear Combination 11-13-15-17-19-21-24-28-32-36T-42T compatibility:Mountain bike cassette flywheel, 11-speed 11-42T, accurate positioning, compatible with two major systems, such as SHIMANO's kit 11-speed DEORE M7100, M7000,M8100, M8000,XTR M9100; SRAM kit 11-speed SX, NX, GX, XX1, X01, X1. Material: Alloy (Lockring, Spacers, Spider Carriers) Compatibility: Shimano/SRAM This cassette is an ideal choice for mountain bike riders who want the simplicity of a 1x11 drivetrain, yet still, have a wide range of climbing gears. Offering you great value for money, it enables you to clean up your handlebars and frame by losing the front shifter and mech, all without the expense of an expander sprocket. Note: Under the premise, it must be matched with conventional cassette hub body