11-40T Lightweight Bicycle Cassette Flywheel 9 Speed Cassette Sprocket Mountain Bike Flywheel Cycling Area Durable Road Bike

Pffiocix

Suitable for a wide range of bicycles, such as road bikes, mountain bikes, road bikes, etc Combination Gear: 11-13-16-20-24-28-32-36-40T; Speed: 9 speed Chain guide groove design improves shifting sensitivity for easy, speedy and smooth shifting Made of aluminum alloy, lightweight and durable Features hollow design to improve drainage, mud dispersion and heat dissipation