Tire sizes

[tw]

Originally Posted by Clodfobble

I ordered the smaller size to match what is currently on the car... and five minutes later a sales rep called me to make sure I really, really wanted to order tires that were so completely not to the manufacturer's specifications.

Manufacturers (the engineers) would define what size tire the vehicle needed. Then the manufacturer would sell the car with a tire size smaller. Undersized tires would wear much faster. Then you bought properly sized tires. I thought these cost control games had terminated decades ago.