I think the following are accurate
White Halftracks were 8.00x20
I.H.C. Halftracks and M20 ,M8 were 9.00x20
CCKW's , the GTB, the chevy 1 1/2 ton, the studebaker US6 the Diamond t 's 968,970a,972,969a were 7.50x20
Diamond t 981 were 8.25x15
DUKW's were 11.00x18 ,
1/2 ton dodges were 7.50x16 ,
3/4 ton dodges were 9.00x16 , as were the 1 ton I.H.C. m-2-4
White 666 were10.00x22
Autocar U7144-t were 9.00x20
Mack NO7 were 12.00x24
Ward La France were 11.00x20
M3A1 Scout car were 8.25x20
Hope this is what you were looking for