• Wide gear ratio mountain bike flywheel, with outstanding performance
• Aluminum alloy one-piece engraving, corrosion resistance, high wear resistance and long service life
• Hollow technology can easily reduce weight and make riding easier

Specification:

• Speed: 12 speed
• Teeth ratio: 11-13-15-18-21-24-28-32-36-40-46-52T
• Compatible with: for SHIMANO, for SRAM
• Weight: 413g
• Material: aluminum alloy