2X 18 And 21 Speed Mountain Bike Bicycle Transmission Split Dip

One Pair Of 18 Speed 21 Speed Mountain Bike Bicycle Transmission Split Dip

Specifications:
Color: Black
Model: 18 speed,21speed
Material: Plastic + metal
Size: 5*9*2
Installation aperture: 22.2mm

Features:
Suitable for MTB / city car / recreational vehicle / road car / folding
Shift line is usually made of metal alloys softness.
Standard configuration is the product has own speed steel wire core, radio tubes
18-speed and 21-speed, left and right 6 3 18-speed, left and right 7 3 21-speed, left are fine-tuning

Package includes:
1 x a pair of bicycle transmission