Features 1、Steel Material and Hardening Technology: The bike flywheel is made of high strength steel and adopts hardening technology. It has greater wear resistance, durability, high temperature resistance, corrosion resistance, rust prevention, no deformation, high durability and good impact resistance, 2、Hollow Design: The hollow design can easily reduce the weight, reduce the riding load, and achieve a good balance between strength and weight. It is an ideal choice to reduce the weight of bikes. 3、High Accuracy Tooth Shape: The bike flywheel has high accuracy tooth shape, toothless design and strong compatibility, which makes riding more possible. 4、Easy Installation: 8 Speed 13‑32T freewheel is easy to install and disassemble, you can directly replace the old or damaged parts to obtain higher strength. 5、Applicable Scenes: 8 speed rotary freewheel, with exquisite workmanship and beautiful appearance, is excellent accessories for mountain bikes and road bikes. Item Type: Bike Flywheel Material: High Strength Steel Product Speed: 8 Speed Color: As Pictures Shown Weight: Approx. 593g / 20.9oz 8 Speed Teeth Number: 13-15-17-19-21-24-28-32T Package List 1 x Bike Flywheel