Chromium molybdenum steel (surface nickel plating) Hollow design to reduce weight
Pull chain design makes speed change more sensitive
Mud Hole design is easier to clean and not easy to drop chain
Accurate reverse chain effect, smooth riding
Lightweight and wear-resistant gear combination
Colour: electroplating colorful
Material: chrome-molybdenum steel
Size: 14 x 13CM
1 x bicycle flywheel
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.