Done

Done

 

I don't think they'll clear the UCA's on the stock Pro wheels. You'll likely need a spacer. But then you might rub elsewhere.

 

Yeah I was concerned about that.

 

Check my signature

 

I have the trd sema wheels on 285's

 

That on a stock lift no rubbing?

 

I have an Icon stage 4 on it, no rubbing

 

Anybody got photos of bigger tires without a lift?

 

Mine sits on pro wheels 285/70-17
No rubbing at all

 

No lift?

 

Do you have drop down steps or are those sliders I see under your door?

 

They're sliders

 

I am sitting on a 3”

 

Reviving the old thread for the benefit of others considering pro wheels with 285s. I DO NOT RECOMMEND 285s WITH 7" OEM TRD PRO WHEELS.

I went ahead with this combination, as many others seemed to not have issues. I figured with all the others who have not had issues, it was probably within a reasonable factor of safety but just too close to be recommended by the manufacturer. As it turns out, after 25k miles my tires are wearing unevenly, and I can feel it when driving. It's not horrible, but I'll end up getting new wheels and tires well before the tires are worn out to fix the issue, and then trying to get some cash for my old wheels to make up the difference. Likely go with FN FX Pro's, as they're 8" wide and within spec.

As an engineer I should have known, but lesson learned nonetheless: stay within spec.

 

You are running the wrong pressure or your alignment was out. 31psi is the recommended pressure for this tire size.

22k on mine and no problems to report. Wearing evenly.

 

I ran 31-33 pretty consistently, but you're right-- I did not rotate quite as often as I should have, and did not realign for a few months after lifting.
Don't get me wrong-- I don't doubt others have had good luck with this combination, and that most of the time it would probably work.
But if you run out of spec the risk is yours to own, and there's no warranty on the 285s once you run it on a 7" rim so don't count on support from the manufacturer if you have any issues.
If I could go back and do it again, I'd run the FN FX Pro wheels with the 285s

 

What kind of tire wear are you getting? The only issue running the 285's on a 7" wheel is that you could get more center wear because your are running a 11.2" tire. If you are getting edge wear or feather, that comes from improper toe and that isn't effected by the tire width.

You could get some handling related issues from the set up if you can't get your caster close to spec. That won't cause tire wear, but will cause wandering. Aside from that safety issue, the only real safety issue is that because the tires are so much wider than the wheels, the bead doesn't sit properly on the wheel and you risk losing a bead which means instant deflation of the tire. That is the reason that the manufactures don't recommend the set up. It would take a special set of conditions to make that happen, but it won't happen just driving down the road.

 

The wear on the tread itself is not uneven, but all of the tires have a slight wobble upon rotational inspection.
Had no issues getting within spec on alignment, but like I said, I did not realign after my suspension settles as early as I should have (waited about 6 months).

All of what you said is correct, but in addition to these possibilities, wide tires on narrow wheels can also distort excessively when turning and cornering.

I can't say for certain that the wheel/tire setup caused uneven wear, but I'll be running within spec (or closer to spec) with my next set of tires to be sure.

 

I highly doubt it was the rim width that cause your tire wear issues. 6 months is a long time to wait for an alignment when it's required. By then any uneven tire wear is permanent, an alignment at that point won't correct the unever tire wear.

All those recommendations listed for tire width vs rim width applies to cars with lower profile tires. Going by those recommendations, even a 285 is too wide for an 8" wide wheel. With higher profile tires it's much more forgiving. With any tire the sidewall will distort when turning or cornering. This is where proper air pressure & application applies. Offroad tires aren't meant for hard cornering. Not supoosed to be racing yor truck with offroad tires on a road course.

 

Are either of you guys running wheel spacers? Just ordered 285/70s for the Semas and am trying to figure out if I'll need them. Currently on 255/70s and I clear the UCAs by at least a couple inches. I have 3" lift with aftermarket UCAs if that matters.