Should the valve stem align with the yellow dot or red dot on the tire?

[LucyAnn]

The valve stem should align with the yellow dot on the tire. The red dot indicates the point of maximum vibration, while the yellow dot represents the point of maximum dynamic balance. The valve stem has weight, and its purpose is to combine the heavy and light points to compensate for each other, allowing the entire wheel to achieve as much balance as possible. The position of the valve stem on the wheel rim is the lightest point on the entire circumference of the rim. To achieve balance, the heaviest point on the rim should be aligned opposite the lightest point. A valve stem is an independent valve device that opens to allow air to enter the space of a tubeless tire or inner tube, then automatically closes and seals to maintain air pressure, preventing air from escaping the tire or inner tube.