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  • This is a very useful calculator aplet: http://software.bareknucklebrigade.com/
    It factors in crank length and rolling diameter.

    I work on metres gain: For general riding I aim at 6m, which on my Langster = 16/46 with 700 x 23mm tyres and 172.5mm cranks.

    I started off much lower and have built up to what appears to be, for me, a nice comfortable gearing.

    Toodle pip

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