I put 6.50-20's on my '35. I wish I had done 6.00's. The duals just don't look far enough apart for my liking and they look too substantial on the front. Originally (from what I can find) mine could have come with 6.00, 6.50, or 7.00 tires. It had one old tire on the front that was a 7.00. It was HUGE. You won't like tires that large. Heck, 8.25's are what my '54, '55, and '58 ton and a halfs have on them. Those old 30's trucks are just meant to have little skinny devils.