EV gear spec sheet

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    This Chart gives you the distance between 1/8" holes for proper gear function.

    note: 12t is for motor only    40t is also drive wheel size

    Gear 1 Gear 2 distance between centers
    12 20 5/8"
    12 30 13/16"
    12 40 1"
    20 30 1"
    20 40 1 3/16"
    30 40 1 3/8"

    Combinations from the following gears 12t, 20t, 30t & 40t

    2 gears in combination

    12:20 3:5 12:30 2:5 12:40 3:10
    20:12 5:3 20:30 2:3 20:40 1:2
    30:12 5:2 30:20 3:2 30:40 3:4
    40:12 10:3 40:20 2:1 40:30 4:3