marked per manen tly on t he inside of t he rim in t he
tire well. This per manen t m ark m ay be a paint dot
or lin e, a per man ent la bel or a st amped im pr ession
su ch as a n X. An optional location mark is a small
spherica l inden tation on th e vertical face of th e out-
board flange on some n on st yled base steel wh eels.
The tire must be rem oved to loca te the per manen t
mark on th e inside of th e wheel.
Before dism ounting a t ire from its wheel, a refer-
ence m ark should be pla ced on th e tir e at the valve
st em location. This reference will en su re tha t it is
remou nted in the origina l position on the wheel.
(1) Remove the tire a nd wh eel assembly from the
vehicle an d m ount on a service dyna mic balance
machine.
(2) Measur e the tot al r unout on the cen ter of the
tire tr ead r ib with a dial indicator. Record the in di-
cator r eadin g. Mark the tire to indicate the high spot .
Pla ce a mark on the tire at th e valve st em location
(Fig. 4).
(3) Br eak down the tire and rem ount it 180
degrees on the r im (Fig. 5).
(4) Measur e th e tot al indica tor r unout again . Mark
the t ire to indicate the high spot .
(5) If runou t is still excessive, th e following proce-
du res mu st be don e.
• If th e h igh spot is within 101.6 mm (4.0 in.) of
the first spot and is still excessive, replace t he tire.
• If th e h igh spot is within 101.6 mm (4.0 in.) of
the first spot on the wheel, t he wheel ma y be out of
specifica tions. Refer to Wheel and Tire Runou t.
• If th e high spot is NOT with in 101.6 m m (4.0
in.) of either h igh spot, draw an arr ow on the trea d
from secon d high spot t o first. Break down th e tire
and remou nt it 90 degrees on rim in t hat direct ion
(Fig. 6). This procedure will n ormally r educe the
runout to a n acceptable am ount, if not repla ce the
rim.
Fig. 4 First Measurement On Tire
1 - REFERENCE MARK
2 - 1ST MEASUREMENT
HIGH SPOT MARK TIRE AND RIM
3 - WHEEL
4 - VALVE STEM
Fig. 5 Remount Tire 180 Degrees
1 - VALVE STEM
2 - REFERENCE MARK
VA TIRES/WHEELS 22 - 3
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