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So I'm considering replacing my 49d's with something with a bigger BCD and also less teeth.
Currently on 52/17 and its a bit tough on the old knees so might scale down to 50/17 and then 48/17 if its still a problem.Any reccomendations on suitable replacements that would look good on a 1960's Bob Jackson?

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DIBS
Charge Track Bars - 25.4mm Clamp, Aluminium. Never used, came off a Plug Racer. - £10