SUMC CHAINS 10 11 and 12 Speed for MTB or Road

SUMC CHAINS FOR MOUNTAINBIKE AND ROADBIKEA chain is made up of a series of links. Most chains have alternating wide and narrow links in a pattern that repeats for the length of the chain.Each link has two side plates, which are held together by rivets (also called pins) and a roller sits on the shoulder of the outer link. In some chains, there can be a separate bushing on either side of the roller, although these are usually absent from modern chains.