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My tire baws.

Posted on 11/15/20 at 2:43 pm
Posted by BorrisMart
La
Member since Jul 2020
8820 posts
Posted on 11/15/20 at 2:43 pm
I've gotta get some new tires and I was looking at these different sizes and I was curious what would be the difference between two tires that are the same size in height when inflated but one is narrower than the other. Does that translate into the narrower one looking like there is less sidewall or appearing stretched? Or does it do the opposite? Sorry I know its a dumb question but I can't wrap my mind around what it would end up doing. I can see pictures on google of the different sizes but it isn't really helping. Like the difference between a 35/11.5r20 and 35/12.5r20.

TLDR: Two tire sizes. Same height on the company's spec sheet. One narrower than the other. What are the real life appearance/ handling differences?
Posted by Jaben
Bham
Member since Dec 2017
35 posts
Posted on 11/15/20 at 5:58 pm to
I’m not positive what your asking but I’ll take a shot. The second number is the width of the the tire so the 11.5r is one inch narrower than the 12.5r. As far as appearance and handling, it depends on your set up. Since this is an over sized tire the extra width is going to bring the fender wells into play. When you turn you will get some rubbing unless you have enough lift or add spacers to push the wheels out. Or want to cut on the fender wells.

I don’t think there will be any handling difference that you would notice between the two. Others may have some real numbers.
Posted by BorrisMart
La
Member since Jul 2020
8820 posts
Posted on 11/15/20 at 6:07 pm to
Thanks for the response. I appreciate it. I realize that the middle number is width, I guess my question is whether the 1 inch is going to minimize the risk of rubbing that much, as opposed to a 12.5. What I was also trying to ask, incoherently I admit lol, is with a narrower tire is it going to create more or a bulging flat sidewall or a flatter (at least in appearance) smaller sidewall. In my head it seems like the wider it is, the more it will hang out from the rim and the narrower the more it would just push the center of the tread up. But I'm realizing with tires nothing is quite what it seems, to a layperson at least.
This post was edited on 11/15/20 at 6:09 pm
Posted by CheEngineer
Louisiana
Member since Aug 2019
4234 posts
Posted on 11/15/20 at 6:39 pm to
Don’t have the answer you are looking for but narrow tire equals more fuel efficient and less breaking/traction but may be negligible in reality for both.
Posted by Jaben
Bham
Member since Dec 2017
35 posts
Posted on 11/15/20 at 6:45 pm to
Post what your truck is and if you have any modifications. I’m sure someone here probably has the same truck and tire or close.
Posted by starkjoey
Member since Aug 2008
184 posts
Posted on 11/15/20 at 7:11 pm to
Custom Offsets has a picture of damn near every combo you can think of. Can narrow down picture criteria more after entering basic info.
Posted by BorrisMart
La
Member since Jul 2020
8820 posts
Posted on 11/15/20 at 7:16 pm to
Ahh thanks I will check that out. Its just a 18 f150 fx4 2.5" level. I have buddies with 35/12.5r20's and no rubbing but I've been told it can vary from the specific vehicle to vehicle. I'll check out custom offsets. Thanks all.
Posted by starkjoey
Member since Aug 2008
184 posts
Posted on 11/15/20 at 7:52 pm to
The issue will be the crash bars Ford put on the newer F150s. I don't think you'll clear them w/o removing bars or going to a true lift.
Posted by BorrisMart
La
Member since Jul 2020
8820 posts
Posted on 11/15/20 at 8:48 pm to
Ahh ok thank you. My brother in law has a 2016 (which is the previous body style to mine I think) and he hasn't had problems with 35/12.5 and he only has a 2" level but the crash bars could be something new to the 18 plus body style. Thanks for the input. I really don't want to go down the modification rabbit hole I just want some bigger ridge grapplers or OC r/t's and I want to make sure I get the right ones the first time because truck tires cost an arm and a leg these days.
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