Forum Discussion

burningman's avatar
burningman
Explorer II
Jan 01, 2018

85 vs 75 tires on dually

I’ve got a 4x4 dually that has stock-spec 215/85/16s on it. (They’re BFG Commercial TAs)
Some time this year it’s gonna get new shoes.
They work fine but I just think the 215s look wimpy.
I’m looking at maybe going to 75s in whatever is the widest that’ll fit on the rear duals without rubbing. 245-255ish probably. I might even consider spacers and 265s.

My question is about handing.
I used to have an ‘83 Chevy dually that came with 16.5 wheels and really low profile tires. It needed polished aluminum wheels, like all duallies. The 16.5 size was all but extinct so it got 16s and 235/85s.
It immediately handled a lot mushier. It had been rock solid on the low profile 16.5s.

Have any of you swapped from 215-235 85 16s to something like 245-265 75 16s and noticed a real change in handling, especially with your camper on?

And who else puts kahlua on their chocolate ice cream?
  • TDWebster wrote:
    If you can find a set of 17" steel dually dodge wheels, that might be an option

    I’m allergic to steel dually wheels.
  • If you can find a set of 17" steel dually dodge wheels, that might be an option
  • In as much as mine is a SRW, I run 285 x 75's which is neither here nor there but Kahula on Chocolate ice cream sounds good. I'll have to try it.
  • Per my experience such small size difference is not going to affect handling much, but tire brand/model can.
    One time I went with the latest trend and put low-profile tries with 18" on our sedan. The ride was terrible, but later on I put super-duper tires on it (same size) and it was day to night.
  • Your biggest problem is going to be on the rear. You need to have enough clearence between the tires so they dont rub.