• Not at home right now but the picture and Velosolo website suggests it's 135mm :)
    If your Puch is has a italian thread BB these two together will give a near perfect chainline (0.5mm out)

    I had to crimp my chainstay slightly to stop the chainring rubbing though, takes a minute with a pair of molegrips, although you may not need to?

    Bit of info on the chainring from velosolo

    "Designed for singlespeed and track use, not for geared bikes. The 135mm BCD is ideal for converting a classic Campag 53/39 square taper road crank (Centaur, Veloce, Record etc) to a single ring for fixed/singlespeed use."

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