The factory F450’s came with 19.5″ wheels and dualies in the rear. Great for heavy loads, not great for mud and snow. It sticks between the duals and creates one big tire. The factory wheels are also a 6″ wide wheel, no room to go to a larger tire either.
So, super singles! A single wheel and tire in the rear, that is larger, but also has a weight rating to carry the load. I found a set of Huchinson wheels that were designed for a armored vehicle. Unfortunately they still use the 19.5″ commercial tires, but the price was right and its a good tire size for our truck. Any bigger and it would take a lift and a lot of cutting. The good news is they are aluminum and beadlocks! Which means we can air down if needed, unlike the factory wheels.
Once the ordeal of having them shipped was done (the got lost…. multiple times) and they were on the back of my truck I was excited! Then reality hit, they are big. Its only a “couple inches” on paper but man are they huge.
The new tires are a bit over 35″ tall, the original ones are about 32″. Does not seem like much on paper, but looks like a lot in person. But it should work.
They fit in the back! The singles replace the “outer” dual. This makes the track width a little different front to rear, but it has not seemed to cause any issues.
The front are a bit tighter fit…. They rub at the back of the wheel well.
A little grinder work and a heat gun on the inner fenders and they fit much better. The drivers side still rubs a little, but not much and long term I will likely fit different fender flares in the front that make much more space.
Overall they are very nice, not a huge ride improvement on the road as the tires are still quite stiff, but they roll over little bumps and rock off road better. I was worried about losing some stability in the back, side winds especially, but there have been no issues at all yet. It drives nearly exactly the same.