Whats the Biggest tire i can fit on a 1930 ford 19 " wire wheel?

are any of you running a wider size on these wheels? pictures would be awesome thank you. these look a lot bigger then the Goodyears that are on my truck, thank you!

http://chattanoogaratrodassociation.com/1930fordfordorsedan-tony.htm

 

Judging by the bulge of the tire, that's about as big as they will take.

 

wonder what the size is? 600 - 19 or 700 - 19

 

im going to try 700 - 19 and see what happens

 

Ever Try the 700-19 on the 19" Model A Rim? What happened?