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117 is the standard length for the Peyrard (NERVAR) Star series chainsets as doubles.

Sutherland gives values of 75.5 for centre width factor and 8.5 for axle end factor.

Unfortunately, IIRC Peyrard does as do T.A. & Stronglight and make their Italian thread cups one mm thicker than their BSC and metric cups so they do not have to offer a spindle for 70mm.

So you would need to change the whole thing.


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