SUMC | SUMC Half-Hollow Ultralight Bike Chain 8/9/10/11/12 Speed Gray Gold Plating With Quick Link Fits MTB Road Folding Bicycle

Note: ①Please re-adjust the transmission every time you change the chain (to ensure smooth transmission and improve riding experience) ②The flywheel also has a useful life. If your bicycle has been ridden for a long distance, it is likely that the wear of the flywheel has exceeded the standard, resulting in the phenomenon of tooth skipping after replacing the chain. ③The yellowing of the silver chain packaging is because the chain oil is yellow, not a product quality problem, and does not affect normal use