I have this bike I got it from wal-mart many years ago. Same as this one on amazon: Denali

The chain rusted. I noticed that it listed the chain on amazon. Chain: KMC Z 51 I bought this one.

I'm trying to put it on and figure out how it goes through the derailleur I think I figured it out. But it seems too big. Maybe I just didn't put it on right.

Do I need to resize the chain to fit my bike? Are they standard sizes?

1 Answer 1


Chains normally come with more links than you need, and you should use a chain tool to remove the excess links from the chain prior to installing it.

This link from park tool shows you how to size a chain (but the easiest way is normally to just match the length to your old chain provided it was adequately sized and you didn't change anything else). This link will show you how to install a chain.

  • It hard to compare to my old chain, cause it's rusty and kinky. Maybe I'll just count the links.
    – jarchuleta
    Mar 17, 2015 at 19:25
  • Yes count the links
    – paparazzo
    Mar 17, 2015 at 20:01
  • 1
    Even if its rusty and kinked, you can normally straighten it out enough on the ground so you can run your new chain parallel to measure it easily.
    – Batman
    Mar 17, 2015 at 21:01
  • 1
    Count links. If the old chain is worn it will be longer than a new chain with the same number of links
    – mikes
    Mar 17, 2015 at 23:07
  • The difference will be small enough that you can compensate for the "pin-drift" and quickly identify the correct number of links. (This is more difficult with half-link chains, which also suck because the plates straighten, lengthening the chain).
    – Emyr
    Mar 19, 2015 at 13:44

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