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On car rims/tires there are many numbers, what do they all mean?
For example:
What does 215/35/18 measure?
For example:
What does 215/35/18 measure?
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Re: Question about rims/tires
It is actually a ratio (first two numbers), and the final number is the diameter of the wheel.Originally posted by agp423 View PostOn car rims/tires there are many numbers, what do they all mean?
For example:
What does 215/35/18 measure?
In this case, 215/35/18 means the tire is 23.92 inch outer diameter of the tire, 8.464 inches wide, and the wheel is 18 inches. -
Re: Question about rims/tires
HMMM, not sure if I am reading Marks correctly, but....Originally posted by agp423 View PostOn car rims/tires there are many numbers, what do they all mean?
For example:
What does 215/35/18 measure?
215/35/18
215 = section width in mm or 8.46"
35 = sidewall aspect ratio / sidewall height. 35% of 215 = 75.25 mm or 2.96"
18" = tire & wheel diameter
Good Info Here
Mike Pennington
Director of Global Training, Events and Consumer Relations
Meguiar's, Inc.
800-854-8073
mpennington@meguiars.comComment
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Re: Question about rims/tires
Yeah, we just said things differently.Originally posted by Mike Pennington View PostHMMM, not sure if I am reading Marks correctly, but....
215/35/18
215 = section width in mm or 8.46"
35 = sidewall aspect ratio / sidewall height. 35% of 215 = 75.25 mm or 2.96"
18" = tire & wheel diameter
Good Info Here
If you take the 2.96 sidewall, and multiply it by two (since it happens on twice when figuring total tire height- once above the wheel, and once below), you get 5.92, which added to the 18 inches of the wheels gives the total tire diameter of 23.92 inches.
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Re: Question about rims/tires
Originally posted by Mark Kleis View PostIf you take the 2.96 sidewall, and multiply it by two (since it happens on twice when figuring total tire height- once above the wheel, and once below), you get 5.92, which added to the 18 inches of the wheels gives the total tire diameter of 23.92 inches.
Mike Pennington
Director of Global Training, Events and Consumer Relations
Meguiar's, Inc.
800-854-8073
mpennington@meguiars.comComment
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Re: Question about rims/tires
I'm not understanding the 8.464 inches part. What does that measure? The thickness of the tire times 2?Originally posted by Mark Kleis View PostComment
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Re: Question about rims/tires
That is the width of the tire tread side to side. Ie, how wide the section is touching the ground.Originally posted by agp423 View PostComment
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Re: Question about rims/tires
Originally posted by Mark Kleis View Post
DUH, haha I should've known that, I guess at the time I asked the question I thought tires were 2 dimensional. 
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Re: Question about rims/tires
Just make sure you get a tire speed rated the same or at minimum of what your OEM tires are/manufacturer recommends.
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