285 tires on 7inch wide rim

We probably all know by now that it is not recommended for 17x7inch TRD PRO or SR5 wheels to run 285/70R17 tires because manufacturer recommend at least 7.5inch minimum in rim width, but thousands and endless people run them and w/o any issues besides from abnormal tire wear.

Has anyone run 285/75R17 tires (which is also 7.5inch minimum rim width) and w/o issues on factory TRD PRO or SR5 wheels too before?

 

I think you'll get a bunch of different opinions on this one. Personally, I think it's fine. I know it's not recommended, but I have numerous friends that offroad pretty hard (fast desert offroading) with 33" and 35" tires on 7" wheels. Not one of them has had a tire unbead. They've gotten flats from hitting stuff pretty hard, but nothing because of a wide tire on a narrow wheel. I know that's just anecdotal evidence, but that's all you're really going to get on this subject anyways.

Also, I've never had a tire shop turn me down when asking to mount a 33" or a 35" tire on a 7" wheel. I think that says a lot. Others experiences may vary.

 

Yep..285/70/17 is fine on TRD wheels.
Also aired down to 15 PSI without issue on Nitto RGs.
I have yet to hear or see first hand of someone de-beading while running this (or similar) set up. Plenty of people talk about it happening, but have never seen it in practice.

 

So you are saying you had friends who run 35" diameter tire on TRD PRO 7" wide wheels? What exact dimension are those 35" tires?

 

Is there a certain PSI range to keep those 285 tires pressure at to keep it safe and prevent risk of de-beading? I'm guessing it's anywhere from 15psi to 40 psi max...

 

Yes, exactly this question. The diameter of the tire has nothing to do with the lip width. There are pizza cutter 33 tires for sure.

OP, you probably won't have a problem. If you don't already own the Sema wheels, consider the FN wheels. They're an inch wider, they're lighter, and they come in more colors. I love my six shooters. They're even lighter still, at 21 lbs per wheel. That saves 9 pounds per corner over the stock Trail wheels.

 

Unless you are running the Baja? I do not think you will break a bead, i have been running mine for awhile now with no problems.

 

I would say it depends on the tires you are running and how you drive.
I off road solo in very remote places and I don't drive like a dip shit.
Most of the terrain is very rocky and or hard packed and no issues aired down to 15 PSI. On road I run 34 PSI.

 

Nice looking tire.
How you are getting on with them so far?

 

The wheel manufacturers know exactly the point at which you'd likely blow a bead. It's simple physics. So, they issue their suggested tire sizes. Where it gets dangerous is when unexpected things happen.

You could have 1000 people have no problem at all. And then all of the sudden you're driving down the interstate, a deer runs out in front of you, you instinctively swerve to miss it, and you blow a bead at 75mph. This puts you and others in a potentially perilous situation.

Some don't mind taking the risk. Can you run them? Sure. Will you have a problem? Probably not. But you might.

 

Exactly. I for one like to follow manufacture recommendations, especially with something that could be life or death to my family members.

 

On my 03', PO put 315/70/17s on the Sport 17.5 rims. I have pushed it hard in the corners on pavement and aired down to 15 lbs psi off road and not had any driving issues for a over a year. That said, on a recent trip I aired back up to 38 lbs and drove home without a problem. A couple days later the right rear was down under 20 psi. I took it to the tire shop I use, and the tech said there was a bunch of mud and debris jammed up in the bead allowing a small leak. I don't have any family at all riding with me so I wasn't concerned, but shit does and will happen. I could have been on the highway and had to do an evasive move and.........So if you carry a lot of weight, family, tow or spend a lot of time on the highway, manufacturers recommendation is a smart choice.

 

I like them, but they do hum a little. Mostly when braking, and not much on the freeway. I like a little more aggresive look on the runner. Very durable tire.

 

They weren't Pro wheels, they were 17" x 7" from a different manufacture. Tire was 35" x 12.5". Same width as your typical 33" tire.

 

It's funny the shit people worry about.
If folks were really concerned with longevity and risk they would stop eating a crap diet and start exercising.

 

If I remember correctly, your shop had put 44psi front and 38psi rear at those tires correct?

 

So seems to me with everything I heard/read from people's opinion and people's experience.

The answer is simple:

To run 285 w/ recommended w/ of 7.5" on 7" wheels are:

Will there be an issue? Very likely not but still isn't 100% safe. How to keep it safe from debeading? Keep the tires at a certain PSI range I would assume...

 

I am assuming you had mud, dirt, and other debris stuck between your rim and tires is because you aired down to 15 psi when you had offroaded, therefore increasing more chance of that happening.

 

I don't think there's an answer to be 100% safe......even if you are within spec you still have a slim chance the tire could come off the wheel during some extreme maneuver.

Perhaps your best course of action would be to go to a reputable tire shop and get their opinion on the matter. The shops that regularly install bigger tires for offroad worthy vehicles will be able to give you an opinion based on a larger sample size than we can here.

 

I am currently running 46psi in the front and 35 in the rear. It does not ride rough at all, and the contact patch is great. Keep on keeping on.

 

I personally had spoke with the people at 4wheelparts and they had told me I will be fine. And that they've installed many many 285 tires on 7inch wide wheel before for their customers on the 4runners. And told me they are liable for their customers.

 

Now this will get jumped on because some folks will not like 4Wheel parts lol.

 

I just got a killer deal on these same tires and want to mount them on my stock SR5 rims as a spare set... did you need to buy spacers to clear your UCAs?

 

No i did not.

 

If rubbing on UCA. It's likely because of aftermarket UCA and need wheel spacer or rims with more negative offset to avoid rubbing on UCA caused by the wider tread width tires.

 

• Yea, I am running 285/70/17 Cooper STT pros right now on vision fury 17 x 8.5 with 0 offset and i'm fine (JBA UCAs)... If i've got to get spacers to fit the Wild Peak M/Ts on the stock rims it's no big deal. Glad to hear SlvrSlug didn't need to though

 

That looks great, how big are those tires? And are those original TRD’s?

 

They are original wheels with 285/70/17 Falken Wildpeak MT’s