Setting And Measuring The Wheel Size; Select From Tyre Table - VDO Cyclecomputing X3DW Instruction Manual

5.2 Setting and measuring the wheel size

You must set the wheel size (wheel roll circum-
ference) of your bike so that your VDO computer
can measure correctly. There are 2 ways of
doing this:
5.2.1 Setting using tyre table
The common types of tyres are listed in the tyre
table. If your tyre type is not listed, we recommend
entering the wheel size manually.
The values given in the table are approximate
values. These values differ according to brand, tyre
height and tyre profile. This can consequently also
lead to discrepancies in the distance measured
and the speed shown.
www.vdocyclecomputing.com
16 x 1,75
20 x 1,75
24 x 1 ⅜
24 x 1,75
26 x 1
26 x 1,5
26 x 1,6
26 x 1,75
26 x 1,9
26 x 2,00
26 x 2,125
26 x 1 ⅜
26 x ¾
27 x 1 ¼
28 x 1,5
28 x 1,75
28 x 1 ½
28 x 1 ⅜
30-622
32-622
37-622
40-622
I F GB
mm-value inch-value
1272 50,1
1590 62,6
1948 76,7
1907 75,1
1973 77,7
2026 79,8
2051 80,7
2070 81,5
2089 82,2
2114 83,2
2133 84,0
2105 82,9
1954 76,9
2199 86,6
2224 87,6
2268 89,3
2265 89,2
2205 86,8
2149 84,6
2174 85,6
2205 86,8
2224 87,6
X3DW 41
D