I also own a row crop 60. But needs to be restored. I learnd to drive tractor on 1939 a row crop 70 that my grandfather bought new and is still in the family. I also own a 1953 70. The thing I hate about the 60 is the 9x32 tires. Hard to find!
I've only owned it about a week and I havent checked tire size...the reason I'm not sure is that the tractor was originally on Steel wheels and they were cut off and rings welded on for rubber.