• This gear calculator lists "700c/29er (622mm" under wheel size options...

    You have to select the tyre size as well to get the correct rolling diameter.

  • Yeah: 23mm.

    I get the same answer with either calc (both using 23-622):

    • (56x16) x 160mm = 7.3GR
    • (56x15) x 170mm = 7.3GR or 98.1"

    Still confused.

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