Look at the tyres on my hire 4WD !

Garrycool
As these tyres contain the letter "C" as a suffix to the size then they are in fact LT tyres, just the Euro method of identification.

LT rating has nothing to do with the load index but its type of construction, and if these tyres were to be replaced with 'P' type or rated tyres (tyres that do not carry either the C or LT in their identification) then you should be looking for tyres that have a load index at least 10% greater than the specified tyres.

Regards
Athol

"C" in the tyre suffix is the Euro specification that stands for "Commercial" (use).
"P' in the suffix stands for Passenger vehicle use.

I'm surprised their 4WD is based on a Mercedes Sprinter.
I found the Britz 2WD Sprinter camper to be a nice little rig, but I think trying to make it a full, off-road 4WD machine, may be a bit of a stretch.

Those tyres pictured, are sealed road tyres only. They'd be useless on even a good quality, unsealed road.

I did find the new Britz camper rental agreement - and they will let you use your Britz 4WD camper on unsealed roads - but you need specific written permission to use it on quite a number of Outback "bush" roads - that are clearly specified in the agreement.

Britz rental agreement

"(c) 4WD Vehicles may only travel to the following areas with
the written permission of Britz: Simpson Desert, Strzelecki
Track, Gunbarrel Highway, Cape York, the Bungle Bungles,
Oodnadatta Track, Birdsville Track, Tanami Track, the
Plenty Highway, Gibb River Road, Burke Development
Road from Chillagoe to Normanton, Savannah Way from
Normanton to Borroloola, Finke Road (between Alice
Springs and Oodnadatta), Central Arnhem Road and
Arnhem Land in general, and
(d) Vehicles are not permitted on the Canning Stock Route,
the Old Gunbarrel Hwy, the Lost City in Litchfield Park,
the Old Telegraph Track section of the road to Cape
York, Boggy Hole (Finke Gorge National Park), the Old
South Road from Maryvale to Finke and Fraser Island
at any time. Travel to Cape York between the months
of December to May is not permitted. The Customer is
responsible for all damage if travelling on these roads as
defined in clause 23.8."

Cheers, Ron.

GREAT, and I just spent 45K on a 4WD BT-50, now you tell me, lol

Wow, Britz say you can take it in the Simpson Desert with their written permission. I wouldn't be that brave, for that matter I don't think I would be taking it down Googs Track either.
My opinion is based only on the pictures on Britz website, would be lacking in ground clearance and ramp over angle in my opinion.

The ground clearance is pretty good, it is a fairly big step up or down to get in or out. But yes the long wheelbase is another matter!!