I was talking to a friend about the tires I want to purchase for my '70 LeMans Sport. This led to a heated discussion (and a bet) about tires and how their sizes are rated. My friend says a P235/50R15 ...

Traction equals performance and for traction you need rubber. The wider the better, but how wide is too wide? Since we don't all own tire and wheel shops, we can't randomly test-fit tire and wheel ...