285's on 7"

spongerx

spongerx

Member
I'm just curious, but what shops are putting 285's on 7" rims? I see a lot of guy's here running the 285s on stock wheels. At my shop we don't put anything wider than a 265 on a 7" rim (it pisses people off real bad - me too, seeing I want a wider tire) because of added pressure to the side wall from "bending in" to met the rim flange :ybrick:. Now granted, my shop is more anal about keeping things within OEM specks, but I'm just wondering if anyone is running into the same mentality when they are trying to up-grade their tires?
 
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I see 35's on 7's all the time on the trails...I'm running 285's on 7's right now, but I'm not road racing it either..

It all depends on how you want to drive....fast through tight corners..get wider rims....intense rock crawling...wider rims.....otherwise you'll be fine on the stockers...

I would add that I fully intend to upgrade my wheels, eventually:guitar2:
 
It's not so much the shop somtetime it boils down to the individual tech. I am not sure if you can say it is a chain wide policy either. One Disc Tire might mount and another one may not. I know a lot of shops are getting more like yours and sticking to manu spec/ recommendation. That is why you find the hole-n-the-wall, tire shop where they just want the business and maybe not the chain stores.
 
Yeah. Costco (where I work) is pretty much by the book. I would like to upgrade to 285s if I lift just to help with staying on the ground while cornering.
but I guess I'll just have to upgrade the wheels at some stage.
 
spongerx said:
Yeah. Costco (where I work) is pretty much by the book. I would like to upgrade to 285s if I lift just to help with staying on the ground while cornering.
but I guess I'll just have to upgrade the wheels at some stage.
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It comes down to the specs from the tire manufacturer. There will be a range of rim widths that are approved for use with each sized tire.

Like Ham Sammich posted, trail rigs will have wide tires on narrow rims, it helps keep the bead at low pressures.
 
I have 285's on my Sequoia wheels which I believe are 7" or 7.5"

There's barely any sidewall bulge and I don't see why anyone who actually knows what they're talking about would shun the idea.
 
JeremyH said:
The engineers who design these vehicles dont know what they are doing in your opinion? Next time you lose a bead when wheeling, thank those narrow rims...
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You're overthinking it. The tire fits and poses absolutely no safety concern. I've never lost a bead and don't expect to.
 
I'm sure lawyers and suits take the actual tolerances from the engineers and then make them even more stringent to avoid lawsuits. In the real world, a 7" rim will support a 285. I personally know it will because for years I squeezed 305s over quite a few rock gardens, aired down to 7 psi on my 7" stockies and never lost a bead. Real world experience tells me that if I can do it with a 12" wide tire, I can certainly do it with an 11"er.
 
Ive ran 286 on stock 5 star rims with NO problem at all. Im currently running 315/75/16 on trd fj rims which are 7.5'' and no problems.

Edit: Didnt the trd fj's come from the factory with 285/75 with 7.5'' rims?
 
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LINY4Runner said:
I've never lost a bead and don't expect to.
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IMG_6237.jpg
 
JeremyH said:
I think you'll be hard pressed to find an auto maker who will put a 285mm wide tire on a 7" wide rim.
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but that has nothing to do with the bead or a safety reason. it's logistical. 285's kill your gas mileage and its a size well out of the realm of the average driver.
THAT'S why OEM won't put a 285 tire on a 7" wheel.
 
LINY4Runner said:
its a size well out of the realm of the average driver.
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Haha....how is the width of a tire "out of the realm" of ANY driver? Too much traction? Good road manners? Dammit, I hate when I am driving on a wet road and I have traction...

I'm sure you could easily find an 11.5" wide tire on a vehicle out there that was placed on there by the manufacturer.

Hell, I drive my Jeep all the time on the road (freeway driving, cornering....all done with an AntiRock sway bar) with 33x12.5 on 8" rims and I have NO problems.

If the width of the tire was unsafe, they wouldn't be produced. But, that's not what we are talking about here...

BTW, I never said that running an 11.5" wide tire on a 7" rim was unsafe....I simply stated that if you wheel your vehicle often and air down, you'll lose a bead easier with that setup than with a wider wheel.
 
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JeremyH said:
Haha....how is the width of a tire "out of the realm" of ANY driver? Too much traction? Good road manners? Dammit, I hate when I am driving on a wet road and I have traction...
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meaning the average driver doesn't do any type of driving which would require a tire of that size.
The OEM picks a tire that is theoretically "right" for the "average" driver. that's why most OME cars will not come equipped with a tire so large.
 
brian2sun said:
I'm sure lawyers and suits take the actual tolerances from the engineers and then make them even more stringent to avoid lawsuits. In the real world, a 7" rim will support a 285. I personally know it will because for years I squeezed 305s over quite a few rock gardens, aired down to 7 psi on my 7" stockies and never lost a bead. Real world experience tells me that if I can do it with a 12" wide tire, I can certainly do it with an 11"er.
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I imagine that law suit etc have a lot to do with this issue, at least from the manufacturer side of things.
 
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