The stock chain on my Wabi Lightning only lasted about 1000 miles before it ran roughly and needed to be changed. If you've gotten 2000 miles out of your stock chain, then more than likely it's time to replace it. Chains are a lot cheaper than chainrings.
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What, Me Worry? - Alfred E. Neuman
I'd like to think i have as much money as brains.
I see the light at the end of the tunnel, but the tunnel keeps getting longer - me