• Can't you just get an old chain off eBay? There's generally some in there in good condition and they should have the specifics your freewheel might require if they are from a similar period.

  • I expect so. At this point I just need a cheap, plain 3/32” chain. I took some measurements last night to confirm it definitely doesn’t need a 1/8” chain. I think a cheap eBay 3/32” SS special is next on the list to check my findings. I’m pretty certain it’s because the chain I used is a KMC 8.3 (despite asking for a basic 5-speed chain at my LBS) which is too flexible, too gappy and too ramped for the teeth on an early 4-speed.

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