Product Details

Color: Rainbow
Weight: About 87g
Size: 14*9.2*1.5cm
Gear ratio:13-18T
Material: Full Carbon Fiber Frame , 7075 Aluminum Alloy
Bearing: Ceramics

Product Features

1. Lightweight: Carbon fiber derailleur puuleys ultralight for 0.18 lbs
2. Reduce Friction: Save 60% frictional resistance than 11T
3. Smooth: Ceramic Bearings make it smooth and save more than 2.4 watt
4. Durable: Full carbon fiber frame + Ceramic Bearings + 7075 Aluminum Alloy Guide Wheel ( CNC )
5. RK3 For: Shimano 7000
7. RK4 For: Shimano 9100/9150/9170/R8000/R8050/R8070