• 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, won't increase the burden of the entire bicycle and more comfortable to use
• The flywheel is suitable for a variety of terrains and riding scenarios, whether it's urban commuting or outdoor adventures

Specification:

• Material: high strength steel + alloy
• Speed: 12 speed
• Type: XD Flywheel
• Teeth ratio: 9-11-13-15-18-21-24-28-32-36-40-46T