Setting wheel dimensions (dim) – COATS ProRide Wheel Balancer User Manual
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Important: Always read and follow instructions.
Setting Wheel Dimensions (DIM)
Before a wheel can be balanced, wheel dimensions
must be entered into the computer.
Definition of Dimensions (DIM)
W = Width
The width of the wheel at the rim flanges, measured
with the calipers or width sonar as shown in figure 17.
D = Diameter
The diameter of the wheel as indicated on the tire.
A = Offset
The distance measured from the balancer (“0” on off-
set arm) to inner plane of the rim (inner weight location).
Figure 11 - W, D, and A Tire Dimensions
Note: Only use calipers provided by the wheel bal-
ancer manufacturer because others may not be the
same.
Note: A thick flange, on some aluminum wheels, can
effect the measured diameter. For example, a 16-inch
rim can have a measured diameter of 15.5-inches.
A2 = Offset
The distance measured from the balancer (“0” on
offset arm) to outer plane of the rim (outer weight loca-
tion). Used only for adhesive weight location.
D2 = Diameter
The diameter as measured at the A2 weight location.
Used only for adhesive weight location.
Figure 12 - A2 and D2 Tire Dimensions
Wheel Data Entry
1.
To automatically enter A & D dimensions, pull the
offset arm out and up against the wheel at the appropri-
ate weight placement location; hold it still and wait for
the deep or the display to change.
Figure 13- Dimensions Screen
Note: When the offset arm is pulled out from home
position, the dimensions screen is automatically
selected.
Note: If the acoustic signal is enabled, the acquisition
of the dimensions is accompanied by a BEEP.
Note: When the computer acquires the wheel dimen-
sions it is indicated by the correction weight symbol,
which changes from blue to red.
Automatic A & D Measurement Methods:
• For Clip 1 data entry, move the arm from home posi-
tion and place the offset arm up against the wheel
flange in either position 1 or 2, as shown in figure 14.
Figure 14 - Automatic A & D Measurement At Clip 1 Weight
Location
Pos A
Wheel Flange Cut
Away - Inboard
Location
Pos 1