Steven Maasland wrote:
>
> Paul asked:
>
> > What is the smallest chain-ring which I can put on a 1983 NR 144BD crank
> > before the chain is dragging on the spider? I want to down-gear the Bob
> > Jackson a little for longer rides and the present set has 52T-43T rings.
> > I have picked up a 49T and would like a smaller inside ring. Will it
> > take a 40T? Is 43T or maybe 42T the smallest I can go?
>
> You can fit an Ofmega or similar 41T ring on if you can find one.
Campagnolo made a 41 tooth chainring also. Pretty hard to find now, but available back in the day. The chain lightly hits the ends of the spider until the metal wears away (self milling?).
Chuck Schmidt SoPas, SoCal
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