Hi Red, I think you're the third person in the last couple days looking for tire recommendations for a 1950 3100.
I purchased wheels from Wheelsmith a couple years ago for my 1950 and am very happy with them. I didn't have any hubcaps already so I opted to buy the reproduction caps that they sell to fit their wheels. I am very happy with these wheels.
15x7 is too short and too wide to handle properly on a stock truck. You can see the horrible examples that were on my truck when I got it. They looked terrible and handled worse. The tread was too wide to steer normally and impossible at low speed.
I ordered the Smoothies from Wheelsmith 16x6 3.5" backspace. If I had to do it again I'd order 16x5 to be closer to the original size.
The tires are Firestone 225/70R16. They look pretty good and handle very well. 215/85R16 would be even closer to the original diameter.
Check out Diamondback Tires for radials that look like bias ply tires if you want the tall flat sidewall that looks like the original style tires.
www.dbtires.com
