Ok my new tire came in today and I was looking for the yellow mark that marks the lightest part of the tire. But the tire manufacturer did not mark it. So how do I find the lightest part of the tire? I thought about mounting the tire on the rim and then watching to see how fast the tire settles then turn the tire on the rim and then measure how fast it settles again, keep doing that until find the slowest settling time and then the bottom the tire at 6 o'clock should be the lightest part of the tire. That is the same spot at the Valve stem. Does anyone have a better or quicker way?