My 2105 2500 4x4 came with 18" Goodyear tires and had an 18" Firestone spare on a steel wheel! I asked the dealer about it and he said the Firestone tires were $10 cheaper, so the bean counters saved the company $10 times the number of 2500's sold...LOL

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!