Bontrager GoTime, Basic Instructions

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To setup a custom wheel size, use the Tire Size chart or measure the bike’s
rollout (the distance the bike travels in exactly one revolution of the wheel). Then
setup the computer.
Tire size Code
12 x 1.75 935 24 x 2.125 196.5 700 x 20 2086.
14 x 1.75 1020 26. x 7/8 1920 700 x 23 2096.
16. x 1.5 1185 26. x 1 1913 700 x 25 2105
16. x 1.75 1195 26. x 1.25 1953 700 x 28 2136.
18 x 1.5 1340 26. x 13/8 206.8 700 x 32 2155
18 x 1.75 1350 26. x 1.5 2010 700 x 35 216.8
20 x 1.75 1515 26. x 1.75 2023 700 x 38 2180
20 x 13/8 16.15 26. x 1.95 2050 700 x 40 2200
22 x 13/8 1770 26. x 2.0 2055 27 x 1 2145
24 x 1 1753 26. x 2.125 2070 27 x 11/8 2155
24 x 11/8 1795 26. x 2.2 2075 27 x 11/4 216.1
24 x 11/4 1905 26. x 2.35 2083 27 x 13/8 216.9
24 x 1.75 1890 26. x 3 2170 29 x 2.1 2288
24 x 2 1825 6.50 x 23 1930 29 x 2.3 2326.
Setting a custom tire size