ZTTO 1228SLRY Bicycle Hollow Flywheel 12 Speed 11-28T Road Bike Cassette Flywheel

• The flywheel is made of high-quality materials, has good wear resistance and fatigue resistance, and can maintain stable transmission performance during high-intensity riding
• The flywheel is made of lightweight materials, making the entire bicycle lighter and more comfortable
• The flywheel is suitable for a variety of terrains and riding scenarios, whether it's urban commuting or outdoor adventures

Specification:

• Speed: 12 speed
• Teeth ratio: 11-13-14-15-16-17-19-21-23-25-28T
• Weight: about 218.2g
• Material: steel, aluminum
• Compatible with: Road bike 11-speed HG systems