One Pair Of 18 Speed 21 Speed Mountain Bike Bicycle Transmission Split Dip
Model: 18 speed,21speed
Material: Plastic + metal
Installation aperture: 22.2mm
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
1 x a pair of bicycle transmission
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