Excuse me, I was in error. My trailer tires are F-19 14ply. Here's a couple pics. They would make an awesome front tire on a tractor, especially if you have a loader.
New Holland T2310, Kubota L3010 GST, New Holland TC21DA, Farmall H *** Previously - 1941 John Deere B, Shibaura SD1500, John Deere 850, Bobcat 642, New Holland 1925