Shimano chains

These chains need to be treated differently to others because the rivets cannot be pushed out of the plates and reused. The original rivets that hold the links in place are made exactly the same size as the holes in the chain plates, which means that they have to be installed with enormous force and accuracy. However, if you try to reuse the rivets, you’ll find that they won’t press back easily through the chain plates – often, instead of reseating itself neatly in the hole, the rivet will tear open the chain plate hole, mangling the link beyond repair. Consequently they are very strong once in place.

Shimano make a special replacement rivet that can be pressed back through the chain to rejoin it. Whenever you split the chain, the original rivet must be pushed out completely and discarded. This can be irritating, but the payoff is that Shimano chains are strong and change very slickly. One of the rivets on your chain is the original joining link that was fitted when the chain was put together. You mustn’t split the chain again at this link. You can identify it easily – most of the links have words printed around the rivet, saying ’Shimano’ and the code number of the chain. The original joining rivet has no words printed around it; avoid this one. Also avoid splitting the chain in the same place twice – any previously…

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