12 Speed Bike Cassette Steel Nickel Plated Wear Resistance Mountain Bike Freewheel for Bicycle

Feature: 1. The bicycle flywheel is made of high strength steel nickel plated, using hardening technology, has greater wear resistance, durability, high temperature resistance, corrosion resistance, rust prevention, no deformation, high durability, good impact resistance. 2. Provides fast and accurate indexing conversion function through special tooth shape and slope, lost tooth design, special shaped irregular cut angle tooth shape, better compatible with various brands of gear shift chains, and shifts and shifts flexibly and smoothly. 3. The hollow design can easily reduce weight, reduce the burden of riding, and achieve a good balance between strength and weight, reinforced aluminum frame, all over the mud holes, effective speed change, easy to install and use, it is an ideal choice to reduce the weight of the bicycle. 4. Easy to install, professional manufacturing, direct replacement of old or damaged flywheels, excellent accessories for mountain bikes and road bikes, easy to install, without any adjustments to the shifting system, unique mountain bike chain design, which can well control the shifting function. 5. Independent small tooth ring, the small teeth of the bicycle cassette flywheel are often used during use, and the independent small tooth design is convenient for future replacement and maintenance, and high tooth shape accuracy, gearless design, and strong compatibility make riding more possible. Specification: Item Type: Bike Freewheel Material: Main Body Steel Nickel Plated + Aluminum Alloy Frame (Red) Product Size: Diameter Approx. 203mm 7.9in Speed: 12 Speed Number of Gear Teeth: 11 13 15 17 19 21 24 28 32 36 42 50T. Package List: 1 x Bicycle Flywheel2 x Sprocket1 x Lock Ring Note: Allowable error of manual measurement.