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Old 02-06-17, 04:13 AM
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Torm
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Here are scans from the original catalogues which indicate that they have the same drop and show the difference visually but with no explanation.

I guess the chain clearance is a good explanation, or was it possibly creating a greater OLD so was one designed for 5 speed and one for 6/7 speed (120mm vs 126mmOLD ?) do you think, although the first scan is from 1977 when it was mainly 5 speed
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