Old 05-18-13, 12:13 PM
Ride, Wrench, Swap, Race
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Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

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For 7-speed UG cogs, the original chain would have to be not only UG but specifically UG NARROW, printed on each link.

I find that modern 9-speed chain works even better than 7 and 8-speed chains on any Shimano or Suntour freewheel or cassette, whether it's a 5, 6 or 7-speeder.

Those old bikes likely might have come with narrower chains, except that they (9sp chains) weren't yet available.

Note that 9-speed chain doesn't always shift well on certain French and Italian freewheels, and can also be incompatible with the chainring spacing on a select few older cranksets.
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