The positive and negative gear design is not easy to fall off from the chain, all joints are in an arc transition, and no sediment will accumulate when riding.
The more teeth on the disc, the larger the diameter, and the assembly is relatively fast, but it is also more laborious.
When choosing a disc with more teeth, please make sure that its diameter does not rub against the frame, otherwise you need to replace a longer bottom bracket and lengthen the chain!
The compatible chain speed is 9/10/11 speed, please confirm that the bcd is 130mm before purchasing!
Free 5 pairs of steel nails
Positive and negative gear design, it is not easy to fall out of the chain, all joints are in an arc transition, and no sediment will accumulate during riding.
Two methods of measuring 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 in the crank to the center of the crank as 65mm
The greater the number of teeth on the disc, the larger the diameter, which makes it relatively quicker to assemble, but also more laborious.
When choosing a disc with a large number of teeth, please make sure its diameter will not rub against the frame, otherwise a longer bottom bracket needs to be replaced, and the chain should be lengthened!
Compatible chain speed is 9/10/11 speed, please make sure the bcd is 130mm before purchasing!