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      01-13-2024, 03:00 PM   #1
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Who makes the widest 315s for or rides?

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We currently have 22 inch Continentals. I like the wide look and don’t necessarily want to go wider but for sure not less wide. Do the common dealer tires for these X’s look the same? My 2019 had 21 inch 315 Perellis but they didn't look as wide as what we have now.
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      01-13-2024, 03:11 PM   #2
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Tires of the same specified width (315) but of a different model or manufacturer will be slightly different in actual width. You can look up the available 315/30/22s on Tire Rack and compare the measured/section width between the options (which can vary further based on rim width, but for this comparison I suspect they're all specified on the same wheel size). Some run narrow, some run wide.
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      01-13-2024, 03:32 PM   #3
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I would think the variation in actual width will be small. After all, the contact patch is the same. Cannot make the actual side wall much wider, right?
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      01-13-2024, 03:37 PM   #4
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Quote:
Originally Posted by eelnoraa View Post
I would think the variation in actual width will be small. After all, the contact patch is the same. Cannot make the actual side wall much wider, right?
I think you are referring to tread width. The tire width is from outside of sidewall to outside of the other sidewall so the contact patch can vary. As you said though, the variation will be very small, I have seen no more than 3% mentioned for the width.
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      01-13-2024, 06:07 PM   #5
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Quote:
Originally Posted by eelnoraa View Post
I would think the variation in actual width will be small. After all, the contact patch is the same. Cannot make the actual side wall much wider, right?
Given their we have like 4 options for the 22s, you're likely right. But there is actually pretty significant difference in tire width between manufacturers, especially when you start getting into performance ones. Brands like nitto are know to run very narrow, and others super wide.

And don't even get me started on the meat Ingles number that is the tread wear rating, lol.
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      01-13-2024, 06:09 PM   #6
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Quote:
Originally Posted by BlkGS View Post
Given their we have like 4 options for the 22s, you're likely right. But there is actually pretty significant difference in tire width between manufacturers, especially when you start getting into performance ones. Brands like nitto are know to run very narrow, and others super wide.

And don't even get me started on the meat Ingles number that is the tread wear rating, lol.
How can there be a significant difference within the same size tires, a mm is a mm no matter who measures it.
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      01-13-2024, 06:15 PM   #7
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Originally Posted by TurtleBoy View Post
How can there be a significant difference within the same size tires, a mm is a mm no matter who measures it.
Because when you're making cheater tires the section width is a "guideline" more than a requirement, lol. I don't know how they convince themselves they made a tire of that size, but look up with width of a BFG or Goodyear tire and compare it to the width of a Nitto of the same size... Major differences, especially in wide tires like on the back of a Corvette.
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      01-13-2024, 06:18 PM   #8
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Originally Posted by BlkGS View Post
Because when you're making cheater tires the section width is a "guideline" more than a requirement, lol. I don't know how they convince themselves they made a tire of that size, but look up with width of a BFG or Goodyear tire and compare it to the width of a Nitto of the same size... Major differences, especially in wide tires like on the back of a Corvette.
You might be confusing tire/section width with tread width. The only difference in tire widths will be due to variations in manufacturing processes and that would be a very small difference.
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      01-13-2024, 08:13 PM   #9
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Originally Posted by TurtleBoy View Post
You might be confusing tire/section width with tread width. The only difference in tire widths will be due to variations in manufacturing processes and that would be a very small difference.


These two tires are both the same spec "size", but clearly not the same actual size.
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      01-13-2024, 08:15 PM   #10
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Quote:
Originally Posted by BlkGS View Post


These two tires are both the same spec "size", but clearly not the same actual size.
Your URL was malformed, here it is. Have no clue what those are and don't really care as they have nothing to do with the conversation or passenger car tires. There is a standard way to measure the tire/section width. Deviations from that are very small and only due to manufacturing differences.

"Section width is the measurement from inner sidewall to outer sidewall when properly mounted, inflated, and without vehicle load. The measurement is in millimeters and doesn’t include ornamentation molded into the sidewall such as the lettering, protective ribs, and similar extensions that aren’t part of the structural sidewall."

"Measuring the section width of your tire requires beginning with it mounted onto an appropriately sized wheel with the correct wheel diameter and rim width for the tire being measured. The tire must be inflated to the proper air pressure but not mounted onto a car or truck for measurement.
Measurement is performed using a tool that can properly span the entire width of the tire and accurately contact the widest point on each sidewall.
Official measurements are performed with the tire mounted to an industry assigned measuring rim."

https://tiregrades.com/tire-anatomy/...dth-on-a-tire/

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Last edited by TurtleBoy; 01-13-2024 at 08:21 PM..
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      01-13-2024, 08:43 PM   #11
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I get it (but apparently not how to add images). One is a Goodyear (on the right), the other a Toyo(on the left). Both 315s.

Like I said, I dunno how they convince themselves they're both 315s, but they are.
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      01-13-2024, 08:59 PM   #12
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Quote:
Originally Posted by BlkGS View Post
I get it (but apparently not how to add images). One is a Goodyear (on the right), the other a Toyo(on the left). Both 315s.

Like I said, I dunno how they convince themselves they're both 315s, but they are.
It is not worth our time discussing it but there is something else going on. There is no way a manufacture is going to take the chance of running afoul of federal /NHTSA regulations and not put the correct information on the tires. 571.139 defines Section Width as the linear distance between the exteriors of the sidewalls of an inflated tire, excluding elevations due to labeling, decoration, or protective bands and that is a required time to be on the tires.
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      01-13-2024, 09:10 PM   #13
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It's the same as shoes: why do different manufacturers size 11's fit different?

There is for sure a difference in width between 'same' sized tires, it's not debatable. Tire rack and other respected sellers talk about it, and state the differences. Also a summer tire may be wider than the a/s tire of the same size from the same manufacturer.
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      01-13-2024, 09:14 PM   #14
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Quote:
Originally Posted by poison View Post
It's the same as shoes: why do different manufacturers size 11's fit different?

There is for sure a difference in width between 'same' sized tires, it's not debatable. Tire rack and other respected sellers talk about it, and state the differences. Also a summer tire may be wider than the a/s tire of the same size from the same manufacturer.
I don’t think we dispute the same 315mm tire may have section width different, it is how much. It cannot be drastic, right?

One observation. Tires pictures in this link
https://tiregrades.com/tire-anatomy/...dth-on-a-tire/

Are they even DOT tires?? My guess is the right one isn’t DOt approved. It is for recreational use only, in this case, track or drag strip tires. When it isn’t dot approved, yeah spec has very little meaning.
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      01-13-2024, 09:36 PM   #15
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Quote:
Originally Posted by eelnoraa View Post
I don’t think we dispute the same 315mm tire may have section width different, it is how much. It cannot be drastic, right?

One observation. Tires pictures in this link
https://tiregrades.com/tire-anatomy/...dth-on-a-tire/

Are they even DOT tires?? My guess is the right one isn’t DOt approved. It is for recreational use only, in this case, track or drag strip tires. When it isn’t dot approved, yeah spec has very little meaning.
They were Goodyear Supercar tires. Performance tires, yes, but still totally street legal tires. The bar for street legal tires is also incredibly low.

These are street legal for reference.

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      01-13-2024, 09:37 PM   #16
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Quote:
Originally Posted by poison View Post
It's the same as shoes: why do different manufacturers size 11's fit different?

There is for sure a difference in width between 'same' sized tires, it's not debatable. Tire rack and other respected sellers talk about it, and state the differences. Also a summer tire may be wider than the a/s tire of the same size from the same manufacturer.
There is no meaningful, maybe 3%, difference between tires of the same size. Also keep in mind we are talking about section width, not tread or overall tire width.
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