Quote:
Originally Posted by track73
This tells you how old I am. When I taught auto mechanics in high school the tires would have marks either on the bead (an indentation) or a paint mark on the sidewall which would tell the lightest side of the tire so it could be mounted on heaviest side of the wheel. That was where the valve stem would be. It made balancing somewhat easier. (I think that was the way)
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This is still the case. The yellow paint dot on the tire indicates the point that should be lined up next to the valve stem. We had optical sensors in the assembly plant that spun the tire and wheel automatically prior to the mount that lined them up. It was something to see 500 tires per hour being mounted for the Vega assembly line. Remember - we had to do the spares as well.
I have had to explain the yellow dot to the techs almost every time I get new tires.