Tire Sizes
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Senior User
Joined: Sep 2011
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From: Whispering Pines, NC
I have to ask because I'm a little slow. I can keep the same rims and put a different size tire on them? I'm guessing as long as the new tire is 15 inches, then I'm good to go?
Elder User
Joined: May 2012
Posts: 978
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From: Covington VA
Yes and no.
Wheel sizes do determine what tires fit. Being a 31/10.50 im sure your rim is a minimum 7.5" wide.
A 7.5 rim is good for a 7"- a 10.5" wide tire although the wider the tire on a narrow rim means your sidewall will have more of a "belly".
If you went to a 31/13.50 bogger on a 7.5 rim you would probably roll the bead off.
Personally i try to keep my rim no more than 2" undersize the width of the tire. 1" is preferred by me.
Maybe you could tell us your sizes ( rim and wanted tire) and we could go from there.
Wheel sizes do determine what tires fit. Being a 31/10.50 im sure your rim is a minimum 7.5" wide.
A 7.5 rim is good for a 7"- a 10.5" wide tire although the wider the tire on a narrow rim means your sidewall will have more of a "belly".
If you went to a 31/13.50 bogger on a 7.5 rim you would probably roll the bead off.
Personally i try to keep my rim no more than 2" undersize the width of the tire. 1" is preferred by me.
Maybe you could tell us your sizes ( rim and wanted tire) and we could go from there.
Elder User
Joined: Jan 2012
Posts: 698
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From: Norman, Ar
Any larger and the rims aren't wide enough(in my opinion).
I have run the 31X10.50's for years on my 85 with no issues..
I don't (personally) have any need for larger tires and wheels because I don't want the expense or other complications of a lift kit,,suspension problems, etc..
Just food for thought...Trav..
Senior User
Joined: May 2011
Posts: 155
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From: North, Ga.
I have ran 12.50's for years on 8" wheels with zero issues. IMO the 7.5" wheel is good for 11.50's and lower, and an 8" wheel is good up to 12.50's. I personally wouldn't go to a 10" wheel unless the tires were wider than 12.50. If you plan to wheel it at all yu can air down 12.50's very low on 8" wheels and not lose a bead. I have ran 35x12.50's on 8" wheels at 10 PSI with no issues on the trail, Don't try it on the pavement though.
Elder User
Joined: May 2012
Posts: 978
Likes: 1
From: Covington VA
XJ
The issue with a 12.5 tire on a 8" wheel is 2" of over hang sidewall to start with. Add vehicle weight that increases the "belly". My problem with that is its too easy to pinch the sidewall between truck and a rock or what have you. The more vertically inline the sidewall/rim are the more protection you have. I ran a 32/11.50 on a stock isuzu 15/7.5 rim and cut the sidewall on a curb in town. Again i completely understand and respect your opinion but with my experiences its just not sensible.
The issue with a 12.5 tire on a 8" wheel is 2" of over hang sidewall to start with. Add vehicle weight that increases the "belly". My problem with that is its too easy to pinch the sidewall between truck and a rock or what have you. The more vertically inline the sidewall/rim are the more protection you have. I ran a 32/11.50 on a stock isuzu 15/7.5 rim and cut the sidewall on a curb in town. Again i completely understand and respect your opinion but with my experiences its just not sensible.
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