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Many tires have cryptic red or yellow dots seemingly placed at random spots around the tire. These are actually there to help make balancing the tire and wheel assembly easier. The dots come in two flavors: red and yellow. The red dot is considered the “high spot” of the tire. It’s complicated and involves a lot of physics, but in short you would mount this “high spot” with a wheel’s (usually steel) “low spot.” This is typically marked on the wheel with a dimple. On an aluminum wheel there likely won’t be a mark, so the red dot is put opposite the valve stem to help counteract the centrifugal force effect of the valve stem’s greater weight. If the tire has a yellow dot, then always mount that opposite the valve stem. The Yellow dot indicates a tire’s “light” static balance point. If a tire has both a yellow and red dot, ignore the yellow and concentrate on the red.