Folding bicycle crank sprocket

Weight: about 525g (left and right crank)

Leg length: 170mm

Color: black\red\silver

Free 5 pairs of steel plate nails

Positive and negative gear design, it is not easy to fall off the chain, all the joints are in an arc transition, and no sediment will accumulate during riding

Two measurement methods of BCD

Note: For a circle surrounded by five holes, the following two methods are relatively simple to measure:
1. Measure the distance between the two holes to be 76.4mm
2. Measure the distance from the hole on the crank to the center of the crank as 65mm
The larger the number of teeth of the disc, the larger the diameter, which makes it relatively faster to ride, but also more laborious.
When choosing a disc with a large number of teeth, please make sure that its diameter will not rub against the frame, otherwise a longer bottom bracket needs to be replaced, and the chain must be lengthened! ! !
The compatible chain speed is 9/10/11 speed, please make sure that the BCD is 130mm before purchasing!