I drove the Uninogs when I was in the Army.
They were fantastic on firm ground and great at climbing loose shaley slopes, but did struggle a bit in the mud.
During the contract tender trials, they'd handled mud well too, however, the bean counters had already contacted for a tyre which were narrower than the original Unimog tyre, so we paid extra to have the narrower rims fitted so it could use the tyres which would fit the old Mark III, IV, and V International Harvester trucks.
The Unimogs that were used to tow the Guns, were constantly getting bogged, so they had to be retrofitted with the original rims and tyres. That solved the problem.
The result was the torsion bar suspension caused all the wheels to lean out slightly at the top, which meant the outside year wore much quicker, and we would go through 3 sets of tyres in the time the wider than the ones towing the guns.
If I was to get a Unimog, I would have to get the original rims and tyres.
Also, be aware when driving through the bush, the brake system is mounted on the outside of a chassis rail, (left I think) and if you sideswipe it on a stump in the bush, being an air brake system, all the brakes lock on.
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