Widest Tire on Stock Wheel

H

holeshot

NAXJA Forum User
Location
Lakeville
What do you suppose is the widest tire I could fit on a stock 93 XJ wheel. I know the wheel is 15" but not sure of the width (possibly 7") Would a 33x12.5x15 work for daily driving or would I be better off with a new wheel that is wider?
 
holeshot said:
What do you suppose is the widest tire I could fit on a stock 93 XJ wheel. I know the wheel is 15" but not sure of the width (possibly 7") Would a 33x12.5x15 work for daily driving or would I be better off with a new wheel that is wider?
Click to expand...

That would rub the lower control arm way too much. Even 10.5" wide tires will do that on stock 7" wide rims. You should get aftermarket 8" rims with about 3-4" backspacing if you want to run 12.5" wide tires.
 
i had 33x12.50's on stock 15x7's for a while. the tires were balooned out a little. looked pretty cool but not very practical. plus my rear tires were so close to the leaf springs you couldnt get a piece of paper in between them.
 
my rule is:

tire width.........rim width
10.5"...............7"
11.5"...............7-8"
12.5"...............8"
13"..................8-9"
14-16".............10"
16+.................12"

i get yelled at all the time for running my 35x16" boggers on 10" wide rims, but you know what im seriously at 2-3 PSI, no bead locks, and not breaking beads, i even had to winch my jeep sideways over rocks and roots to get unstuck, and it pulled at the tire, but, didnt break a bead
 
tealcherokee said:
my rule is:

tire width.........rim width
10.5"...............7"
11.5"...............7-8"
12.5"...............8"
13"..................8-9"
14-16".............10"
16+.................12"

i get yelled at all the time for running my 35x16" boggers on 10" wide rims, but you know what im seriously at 2-3 PSI, no bead locks, and not breaking beads, i even had to winch my jeep sideways over rocks and roots to get unstuck, and it pulled at the tire, but, didnt break a bead
Click to expand...

That's a good rule of thumb and wow that is amazing how you run so low psi and haven't popped a bead.
 
I don't remember who, but I recently saw on a website someone selling LCA's that were bent in slightly so you could run wider tires on the stock wheels without rubbing. Not sure about the price but it may or may not be cheaper than buying new rims.
 
tealcherokee said:
my rule is:
i get yelled at all the time for running my 35x16" boggers on 10" wide rims, but you know what im seriously at 2-3 PSI, no bead locks, and not breaking beads, i even had to winch my jeep sideways over rocks and roots to get unstuck, and it pulled at the tire, but, didnt break a bead
Click to expand...

Yeah the guys I bought my tires from were a little upset that I made them mount 35x14.5" boggers on an 8" rim. But they kick butt that way, I ran 35 miles on the freeway at 70mph with 3psi in them... haha whoops. No beadlocks either. I dont do that often though, just happened to forget to air them up after a day of wheelin.
 
wrecked...you might try and be a little more careful next time. running 2-3 psi going 70 on a freeway is a recipe for disaster. think about the family right behind you the next time you pull a stunt like that.

just my .02
 
XJFREK said:
I don't remember who, but I recently saw on a website someone selling LCA's that were bent in slightly so you could run wider tires on the stock wheels without rubbing. Not sure about the price but it may or may not be cheaper than buying new rims.
Click to expand...
Grand Cherokee WJ lowers. The length is correct but you have to shave down the width of the bushings and sleeves slightly.
 
Generally a taller tire can be fitted on a narrow rim without a tread wear problem.

A 31x10.5 is about the widest 31" tire that fits a 7" rim without excessive tread crowning from highway speed operation, and a 35x12.5 on the same rim will experience similar minimal tread crowning (a 33x12.5 will crown and wear a center stripe on a 7" rim when operated at safe highway pressure and speed).

The tall tire sidewall height can flex to allow the tread to lay flat even when the rim is narrow, something that is not possible with a short tire sidewall. Is sometimes easier to see this reasoning when looking at the other end of the tire/rim spectrum, try to fit a 315/45/15 on a 7" rim? Would anyone expect the tread to lay flat at highway speed?
 
stay the FAWK away from me on the road. i had 10-12 lbs in my swampers on the street just to have a decent ride and the sidewalls would roll if i cornered too hard. with 3psi i cant imagine what would happen if you had to do an emergency evasive swerve. :x
 
i knew a couple guys that ran 35x12.50 on their stock 15x7's for a while...actually one of the guys from crawltech offroad...and when i wheeled with him he did some pretty nasty stuff...never poped a bead tho which was amazing!
 
tealcherokee said:
i dont air my tires up, 3 psi, daily driver (for now) hold up w/o a prob as of yet
Click to expand...
The main purpose of air in a tire is to cool it!
And 3 psi on the hwy is just plain stupid!! You will heat up the tire then the inner liner of the tire (which is what holds the air) will start to come apart the the whole tire shread's.
I have got them in the shop (when I was still at the tire shop) where there was nothing but 2 side walls left on the rim and the whole tread was gone when a tire fails from low pressure.
You could also shift the belts in the tire at that low of pressure, which means you could never ballance it to ride smooth again!
I wouldn't run that tire at any under 20psi!!
 
tealcherokee said:
i dont air my tires up, 3 psi, daily driver (for now) hold up w/o a prob as of yet
Click to expand...

if your serious, your a fawkin idiot. nuff said.

And just to repeat what's already been said - it can be done, but you ought to go with an 8" rim.

-jm
 
When I said I ran 3psi on the freeway. It was an accident, I would never run that normally. It was a 7-10 mile trip. Lately I havent even aired down on the trail so there isn't much worry.
 
jeepdeepfreak said:
So what ever happened to running the psi recommended by the manufacturer, printed on the sidewall......?
Click to expand...
That pressure is a MAX PRESSURE for the tire. The pressure that you should run is printed in the glove box I belive (it is on mine). It is all different for different size tires on different car's and truck's. So yo can't just go by the max pressure on the tire!
 
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