Tire size concerns
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Tire size concerns
I am in need of new tires and am wondering what size I could get with stock 15 inch rims with a width of 7.5 inches. I understand the truck comes stock with 235/75/15 tires but I want to beef it up a little and yet not harm my brand new tires. I know the clearance for these tires is fine but I don't want any crowning to happen. Would I be safe with 31/10.5/15 tires on my stock rims?
More Turbo
Joined: Jan 2007
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How are you measuring rim width ??
INSIDE flange to INSIDE flange is correct.
Many measure outside to outside, which is WRONG and will yield a measurement about an inch greater than true rim width.
Standard issue factory rims were usually 6.5"
INSIDE flange to INSIDE flange is correct.
Many measure outside to outside, which is WRONG and will yield a measurement about an inch greater than true rim width.
Standard issue factory rims were usually 6.5"
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Joined: Jan 2001
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From: Virginia
I am in need of new tires and am wondering what size I could get with stock 15 inch rims with a width of 7.5 inches. I understand the truck comes stock with 235/75/15 tires but I want to beef it up a little and yet not harm my brand new tires. I know the clearance for these tires is fine but I don't want any crowning to happen. Would I be safe with 31/10.5/15 tires on my stock rims?
If you run aftermarket rims like the other poster did, they they will not rub the radius arms and if they are 8 inches wide they will not wear in the center either. They still will rub a little bit in the backwhen loaded down, but you will have to decide if this will be a problem depending on how you use the truck.
P.S. My rubber suspension stops were missing on my truck in the rear, so that might be the cause of the rubbing when heavily loaded. If you still have your rubber stops they may keep the suspension from flexing up enough to hit the plastic liners in the wheel wells in the back.
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Freshman User
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Well I have 2 sets of rims both 7.5 inches I just don't want to end up ruining my new tires since new ones aren't cheap. I have my truck leveled and still have my rubber bumpers so rubbing wont be too much of a problem. Just don't want crowning.
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Are the wheels stamped "15x7.5"?? Stock steelies are like the previous poster said, usually 6.5".
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Well I measured from the inside lip to the inside of the other lip and it measured 7.5 so I would assume its 15x7.5 if I am not mistaken.
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From: Virginia
I believe they will be ok. When you get them installed, get some chalk and draw a line across the tread. Then drive it forward a few feet on pavement, and see if the chalk is rubbed off most of the tire. You can vary the air pressure to get what you want.
Fleet Mechanic
Joined: Jul 2011
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An F150 can only fit up to about 34.5'' of rubber, stock
Laughing Gas
Joined: Sep 2012
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From: Georgia
Most tire makers will have on their web site charts showing tire sizes and approved rim width for each. For instance:
CooperTiresConsumer - Discoverer S/T<span class='trademark'>™</span>
Column 6 is approved rim width.
CooperTiresConsumer - Discoverer S/T<span class='trademark'>™</span>
Column 6 is approved rim width.
Posting Guru
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yes it is, i totally forgot about how much bigger the f250 is, and its 4x4 i also forgot how the 250 has a 2inch block in the rear
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