الوصف

Teeth Chain: *4T/*4T/*6T/*8T/*0/*4T/*6T/*8T
Crank: **4/**7/**2/**0mm
3, Material: Steel
4, the crank shape: winding
5, Petal spindle: *4 * 1.*5mm
6, Our crank has two styles: the round pin crank crankshaft key
7, the length of the crank pin is *9 mm, **2 mm, **4 mm, **7 mm (children's bicycle), **0mm (*2 # bicycle), **2 mm (*4 # bicycle), **5mm (*6 # bicycle), **0mm, **5mm (*8 # bicycle). without keyway crank **0mm **5mm ..
8 connecting rods crankshaft key: *4T, *6T, *8T, *2T, *6T, *0T, *4T, *6T, *8T, *2T
9 B.B.AXLE hole: *6mm