Setting And Measuring The Wheel Size; Setting Using Wheel Circumference - VDO X2DW Instruction Manual

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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.
34 X2DW
mm-value inch-value
16 x 1,75 1272
20 x 1,75 1590
24 x 1 ⅜ 1948
24 x 1,75 1907
26 x 1 1973
26 x 1,5 2026
26 x 1,6 2051
26 x 1,75 2070
26 x 1,9 2089
26 x 2,00 2114
26 x 2,125 2133
26 x 1 ⅜ 2105
26 x ¾ 1954
27 x 1 ¼ 2199
28 x 1,5 2224
28 x 1,75 2268
28 x 1 ½ 2265
28 x 1 ⅜ 2205
30-622 2149
32-622 2174
37-622 2205
40-622 2224
VDO CYCLECOMPUTING
How to set the tyre size by selecting the tyre:
Using go to SETTINGS/
SELECT. Confirm with
You are now in setting mode
(pressing C for 3 seconds gets
you back to function mode).
Using up/down go to
50,1 WHEELSIZE/SET.
62,6 Confirm with
76,7
75,1
77,7
79,8 MEASUREMENT/KMH.
80,7 Confirm with
81,5 change to MPH.
82,2
83,2
84,0
82,9
76,9
86,6
87,6
89,3
89,2

5.2.2 Setting using wheel circumference

86,8
84,6
85,6 To enter the wheel size manually, you must first
86,8 measure the wheel roll circumference on your bike.
87,6
Measuring wheel roll circumferences:
www.vdocyclecomputing.com
WHEELSIZE/BIKE 1 (use
M . go to setting for bike 2).
Confirm with
WHEELSIZE/ TYRE SELECT.
Confirm with
.
M
TYRE SELECT/SELECT.
Now select your tyres using
M or to The confirmation question appears "Tyresize"/
SELECT OK? When the displayed tyre size matches
the one you want, confirm with
The display confirms WHEELSIZE/SET DONE
Automatic return to SETTINGS/SELECT.
step 1 Precisely align valve on the front wheel
vertically to the ground.
Step 2 Mark this spot on the ground with a line
(e.g. chalk).
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to
M .
M .
. Confirm with M .
M .
>>> P07
X2DW 35