There are some photos of Tank transporters on various sites on the internet, including an M9 trailer with an M4 Sherman on, behind a White 666. That has a covered dog house like a Diamond T. An american recovery team blew some rear tyres on an M9 recovering a King Tiger towards Spa railway station, eventually completing the trip with a captured Gotha heavy transport trailer that appears to have solid tyres. There is also a picture of a tank loaded 4 axle 50 ton headed by what looks like a DT.