Product Name: Positive and Negative Gear Guide Wheel
Material: Aluminum alloy+Ceramic beads
Number of teeth: 12T
Weight:~12g (including variable diameter sleeve)
Variable diameter sleeve: 4/5mm
Color: Black/Red/Purple/Gold/Blue
Feature:
1. High strength aluminum alloy, CNC processing, enhance the durable strength;
2. Deepen the tooth mark: can effectively reduce the situation of chain off, more clear speed change, more stable on the chain.
Fit for: 8/9/10/11 Speed Bike