1.Our gangbicycle cassette is made of highquality steel material, which is resistant to high temperatures, corrosion, rust, deformation, wear, high durability, good impact resistance, high tooth shape precision, lost tooth design, strong compatibility, makes riding more possible 2. smooth acceleration and precise positioning within the gear range, whether you are dealing with steep climbs or unevenness on flat roads, this bicycle cassette can provide efficient power transmission and reliable shifting 3.The bicycle flywheel is made of nickelplated steel sheet with highstrength, multilayer galvanization and rustproof treatment 4.The bicycle flywheel rotates smoothly and quietly and can directly replace the old or damaged flywheel 5.1. Effortless Installation: No advanced knowledge required; our MTB hub with 9speed thread has a specially developed tooth profile that improves chain hold, prevents slipping, and ensures a cycling experience. 6.2. Improved Hold: The unique tooth design of the 9speed bicycle chainring maximizes chain tension and ensures a quieter ride and more efficient power transfer, so you can confidently tackle steep climbs. 7.3. HighQuality Materials: This 9speed flywheel made of topquality metals withstands the demands of intense riding, ensures optimal performance, and extends the life of your equipment. 8.4. Ride with Confidence: The antislip technology of our MTB 9speed flywheel ensures a secure fit of the chain, reduces the risk of accidents during highperformance rides, and provides on uneven trails.