Road Force® Arrows
Road force indicates the amount of vertical (radial) Road Force® variation remaining
in the tire/wheel assembly after Forcematching®. Refer to “Forcematching®,” page 82.
Magnitude is measured in pounds (lbs), Newtons (N), or kilograms (kg). To minimize
vibration, the tire/wheel assembly with the largest amount of road force is typically
positioned farthest away from the driver (right rear). Even though the front (steer) axle
tires may be switched to change the direction of net pull, the rear tire/wheel assembly
with the largest amount of road force will still be positioned farthest away from the driver.
Changing Tag Numbers
The Changing Tag Numbers is the means of identifying each tire/wheel assembly
during the StraightTrak® Lateral Force Measurement procedure. When the first
tire/wheel assembly is ready to be tagged, the only option will be to tag it as tag 1.
The second tire/wheel assembly will default to tag 2, however you may change it to
tag 1 by rotating the control knob and then pressing “OK.” The third and fourth
tire/wheel assemblies may be tagged by accepting the default (the next sequential
tag) and pressing “OK,” or by rotating the control knob to a previous Changing Tag
Numbers before pressing “OK.”
A measured and tagged tire/wheel assembly can be replaced by mounting a different
tire, doing the lateral force measurement procedure, and then tagging the new
tire/wheel assembly with the same number as the assembly that is being replaced.
The new tire data will replace that of the original tire that is being replaced.
NOTE: If a tire/wheel assembly is tagged as a number other than its
default tag, information for the previously tagged (same
Changing Tag Numbers) tire/wheel assembly will be deleted.
Example: Four tire/wheel assemblies have been measured
and tagged with their default tags. Tire/wheel assembly 2
showed a significantly different amount of lateral pull (refer to
“Show Details,” page 101), while the other assemblies were
all very similar. If a different tire was mounted on rim 2 and it
measured similar lateral pull to the other three assemblies, it
would be desirable to include it with this set instead of the
one tire that has a significantly different amount of pull. This
fifth wheel/tire assembly could now be tagged as 2,
eliminating the original measurement for tag 2.
GSP9720JLR Wheel Balancer Operation Instructions Road Force® Measurement Procedures
99
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