Tyre size on this Dodge semi?

[Tony Smith]

10.50-20 on the Dodge T-L110 and 7.50-20 on it's trailer.
The Dodge had the same hub bolt pattern as the CMP and although originally fitted with 6.00x16 rims and 10.50-16 tyres, in Aust Army service they frequently had CMP 6.00x20 rims and 10.50-20 tyres fitted. This made better use of the two speed diff and enabled better speeds and reduced tyre wear. The 10.50-20 tyre was also more widely available and as it was mounted on a CMP rim, cannabilising of parts was easier.