Originally Posted by
FBinNY
BTW- depending on the rest of the chain's condition, you might be able to repair it by cutting out the damaged outer link and replacing it with a connector from Sram, Wippermann, or KMC. Just be sure to buy the right width.
+1. If you do go with a new chain, be sure you install it per the instructions. On many new chains, once you've pushed a pin out, you can't put it back in because the holes on the outer plates get enlarged. Either use the special connecting pin on Shimano chains or a connector link on other chains (including Shimano). On my MTB commuter, I use a Shimano 6,7,8-speed chain and KMC 8-speed connector link.