Single VS Dually rear tires….again, real world experiences

[jslamerman]

I’m at the point where I’ve got to decide whether to convert to singles on my 2004 f350 4x4 ambulance build, and pretty quickly. I either need to get 6 255/85r16 or 285/75r16 with spacers and effectively go 33 diameter for a really large vehicle, or convert to say a 295/65r20 and do singles (remove the bolt on factory front dually spacer, and get steel 2 or 2.5 rear wheel spacers and end up with a 35. Research says the singles are going to have just over 4000 lb load rating each, for a max load of just about 8100 on the rear axle. What say you guys??

 

[Schitzangiggles]

I've had far more issues off road with duals than I ever had with singles. Don't get me started with dualies in the snow and ice

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[Peter_n_Margaret]

Good off road performance, especially in sand, needs a high profile tyre to make the best of a low pressure footprint. I would consider 295/65r20 to be a poor choice.
I run 305/70R19.5 on my 6.5T OKA and I think 70% profile is the minimum acceptable. More is better.
Look for a smaller diameter rim and larger diameter tyres.
I am currently building another OKA and will use 37R12.5/17s. For more weight capability consider 37R13.5/17s.
Cheers,
Peter
OKA196 motorhome