COOKIES ON THE YOKOHAMA TIRE SITE
Yokohama places red and yellow marks on the sidewalls of some truck tires to enable the best possible match mounting of the tire and wheel assembly. There are two methods to ensure they are mounted properly:
When performing uniformity match mounting, the red mark on the tire, indicating the point of maximum radial run-out, should be aligned with the wheel assembly’s point of minimum radial run-out, which is generally indicated by a dimple somewhere on the wheel assembly (consult manufacturer for details).
When performing weight match mounting, the yellow mark on the tire, indicating the point of lightest weight, should be aligned with the valve stem.