Tire Concerns: Yellow and red dots on sidewall
by Dave Haslin
(Kingston new york)
colored dots
Is it true the yellow dot should be placed above the valve and red dot on the inside rim?
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Editorial Comment:
The use of colored dots on tire sidewalls is a new practice which is still in the process of becoming wide spread and standardized.
Usually colored dots on a tire are found on OEM tires and not on after-market tires. What we've been able to learn so far seems to indicate that in some cases
Yellow=Light
Red=High
These are guides to technicians in mounting tires so that aligning the red mark with the low spot on the wheel(usually marked on wheel with white dot) is the best method for mounting tires.
The intent is to make the assembly more uniform and helps limit the RFV (Radial Force Variation).
Some of the newer, more sophisticated, tire balancing machines, will "OEM Match" tires for you, which basically means matching the uniformity of the wheel to the uniformity of the tire. This is considered important when mounting very stiff or high performance tires, as it limits tire vibrations which cause shimmy and shake.
TG