• The gear teeth are crafted from high-carbon steel, ensuring both the rigidity and wear resistance of the flywheel, thus extending its lifespan
• High precision teeth ensure close connection with bicycle hub for smooth rotation and easy maintenance
• The hollow design reduces weight and makes your riding easier
• Use it to directly replace your old or broken flywheel. A wonderful accessory for most mountain bikes. Easy to install

Specification:

• Material: Chromolybdenum Steel
• Teeth ratio: 11-46T (11-13-15-18-21-24-28-32-36-42-46T)
• Weight: 621.4g