Replaced the front ones twice. Rear ones are original...lol

 

can you expand on that please? i'd heard, and seen, exactly the opposite, based on just that 4 tires have more rubber on the ground than two. why isn't this an improvement in traction over SRW?

thanks for your time.

 

Duallys have more rubber on the ground, expanding your foot print, spreading out more weight across more surface, reducing traction, and just floating over snow/mud etc.

Skinny tires have more traction as the weight is concentrated in 1 small area, sinks in and grabs traction.

 

its the same reason why snow cats can pwn the snow but a truck sucks. the more surface you spread the weight over the less pounds per square foot you have.

 

what these guys said.
some people actually think going to dually improves traction.many think "more" is better.
it just isn't so,as these two guys explained perfectly.
so i bring it up every time one of these questions arise before someone pays the 1k+ for the conversion,so people can make a better informed decision.

 

I've been thinking about doing a part time dually conversion for my 83 f250 flatbed, as I often overload the single wheels (235 load range e). A friend gave me a dana 70 dually axle, which I just have to find time to install, it sounds pretty easy to swap the axle once I regear it, then its just a matter of finding the right wheels... I know the difference in traction, but when overloading limits my speed (tire sway) to 35, I think its worth it for part time use.
for you,i would suggest checking your weight to see if duals are necessary, if your truck with camper is near or over your tire ratings, the upgrade is helpful, but if you have more than a few hundred pounds between your actual weight and your tire ratings, I would stick with singles

 

You need to make sure that Dana 70 is from a dually PICKUP truck.
A dually axle from a cab and chassis F350 (Dump truck, flatbed/stake, service truck) with a 34" frame is set up to run 2.25" wide leaf springs and the spring perches are not int eh correct spot for a pickup.
Pickups run a 37.5" wide frame and either 2.5 or 3" wide leaf springs.
If you have 4x4 and have a Dana 44HD TTB up front, you could swap in a Dana 50 TTB and then bolt on Dana 60 dually hubs to the 50.
That would give you a little beefier front end with larger ball joints, slightly larger ring gear (though that's not the weakest point on a TTB), and Dana 60 size lockouts (D50 and D60 lockouts are the same).

Going back on track here, I think you will be OK with the singles. You could find some cheap used 235/85R16 (IF you have 4x4 dually wheels) or 215/85R16 definetly, and then find the spacer/adapter and then mount the dually's whenever you need them. I got a set of 215/85R16's off craigslist with about 30k miles on them for $100 for the matching set.