Tire Size
Lead Driver
Joined: Feb 2013
Posts: 5,006
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From: Roseville, MN
General rule of thumb is that the rim width should be about 2" less than the tire section width. So a 10.5" wide tire should be on a rim that's 1.25" wider than the rim for a 9.25" wide tire.
However, that general rule of thumb isn't a hard and fast rule. you can put that tire on the stock rim. It MIGHT wear faster in the center, and it MIGHT not handle as good as it should. But you might not notice anything either. A lot of people do go even wider than 10.5" on stock rims.
However, that general rule of thumb isn't a hard and fast rule. you can put that tire on the stock rim. It MIGHT wear faster in the center, and it MIGHT not handle as good as it should. But you might not notice anything either. A lot of people do go even wider than 10.5" on stock rims.
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Freshman User
Joined: Jan 2015
Posts: 40
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Thanks everyone for the replies.
My questions now are. What is the proper size rim for the tire and is there anyway to make it not rub?
If you haven't figured it out by now, this is my first truck.
Thanks,
Gary
EDIT: One more question. To measurer the size of the tire, do you measurer around the tire or the height from the ground to the top of the tire?
My questions now are. What is the proper size rim for the tire and is there anyway to make it not rub?
If you haven't figured it out by now, this is my first truck.
Thanks,
Gary
EDIT: One more question. To measurer the size of the tire, do you measurer around the tire or the height from the ground to the top of the tire?
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Junior User
Joined: Oct 2014
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I am running 31x10.50R15 on stock 15 x 7.5 inch steel rims. No rubbing whatsoever. They handle great all around. 1995 F150 4x4. Might handle a little different for RWD though.
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Freshman User
Joined: Jan 2015
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Thanks for replying. Mine is 1995 f150xlt Flaseside 2wd.
Thanks,
Gary
Senior User
Joined: Nov 2013
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10.50" wide
15" rim
Now here is where it gets interesting. For 235-75R15
235 is the tread "section width" in mm
75 is the aspect ratio, meaning the sidewall is 75% of the section width tall.
15 is the rim diameter.
So to get the total height, you have to do:
(235x0.75x2)/25.4 +15
The 2 is for 2 sidewalls and the 25.4 is to convert mm to inches.
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Freshman User
Joined: Jan 2015
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31 - 31" tall
10.50" wide
15" rim
Now here is where it gets interesting. For 235-75R15
235 is the tread "section width" in mm
75 is the aspect ratio, meaning the sidewall is 75% of the section width tall.
15 is the rim diameter.
So to get the total height, you have to do:
(235x0.75x2)/25.4 +15
The 2 is for 2 sidewalls and the 25.4 is to convert mm to inches.
10.50" wide
15" rim
Now here is where it gets interesting. For 235-75R15
235 is the tread "section width" in mm
75 is the aspect ratio, meaning the sidewall is 75% of the section width tall.
15 is the rim diameter.
So to get the total height, you have to do:
(235x0.75x2)/25.4 +15
The 2 is for 2 sidewalls and the 25.4 is to convert mm to inches.
I have another question (maybe I should start another thread). I have looked online for a leveling kit for my truck and it seems that it is only two springs. Is there anywhere that I can find the height of the springs? I have a brand new spring that i am going to put on the passenger side and would like to know the difference. The guy I bought the truck from bought two front springs but only one spring tower so I'm going to get the other spring tower to level the truck with the drivers side.
Thanks again for everyone that has replied.
Gary
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Viger81
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Jan 13, 2017 11:28 PM