• Nickel-plated surface, corrosion resistance, high wear resistance and long service life
• The surface is specially treated to make it have strong oxidation resistance, prevent flywheel from rusting, with longer service life
• Hollow technology can easily reduce weight and make riding easier
• Outstanding performance, to achieve the ultimate riding experience

Specifications:

• Speed: 12 speed
• Teeth ratio: 11-12-13-14-15-17-19-21-23-25-28-32T/11-12-13-15-17-19-21-23-25-28-31-34T
• Weight: 11-32T: 352g, 11-34T: 380g
• Material: steel