Tire size conversion

Elvota · 09-02-2008, 10:38 AM

What the heck size is a LT265/75R16 anyway?

http://www.procomptires.com/conversionchart.htm

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AxleIke · 09-02-2008, 10:56 AM

Neat link, but the math is exceptionally simple to figure it out if you don't have one.

265 is the section width in mm. 75 is the percentage of the section width that is the side wall.

R stands for radial

16 is the rim size.

265/25.4=10.4 (converting mm to inches). So this tire is a 10.50 for all intents and purposes.

10.4*.75=7.8 (this is the sidewall height, which is 75% of the width of the tire).

Since, in a diameter calculation, you have a sidewall, the rim, and then another sidewall, if you are measuring from the ground to the top of the tire, you get the following:

(7.8*2)+16=31.6

So, given that most 32's are less than 32" by a good amount, it is fair to say that this tire is roughly a 32x10.50.

Which, you will note, is the same figure you get in the calculator.

(EDIT: Posted for furtherance of knowledge, NOT to imply that anyone is dumb or anything. Just an FYI post)

Project_Woody · 10-11-2008, 11:22 AM

nice link, ive been tryin to figure out what size my tires were forever now...

dlarrivee · 12-23-2008, 07:06 PM

Quote:

nice link, ive been tryin to figure out what size my tires were forever now...

Ever heard of a tape measure?

Bako88 · 12-23-2008, 07:16 PM

Thanks for that explanation AxleIke. I saved that info for later reference.

tvaughan · 03-17-2009, 03:40 AM

I am a spammer, and I was banned!

kyle82 · 05-02-2009, 12:50 AM

how do we convert the 16 to 17 wheel? are there changes to be done with the interior aside from the wheels themselves? or even the body, how should we take note of the adjustments sir?

09-02-2008, 10:56 AM	#2 (permalink)
AxleIke Contributing Member Join Date: Apr 2004 Location: Boulder, Colorado Posts: 4,887	Neat link, but the math is exceptionally simple to figure it out if you don't have one. 265 is the section width in mm. 75 is the percentage of the section width that is the side wall. R stands for radial 16 is the rim size. 265/25.4=10.4 (converting mm to inches). So this tire is a 10.50 for all intents and purposes. 10.4.75=7.8 (this is the sidewall height, which is 75% of the width of the tire). Since, in a diameter calculation, you have a sidewall, the rim, and then another sidewall, if you are measuring from the ground to the top of the tire, you get the following: (7.82)+16=31.6 So, given that most 32's are less than 32" by a good amount, it is fair to say that this tire is roughly a 32x10.50. Which, you will note, is the same figure you get in the calculator. (EDIT: Posted for furtherance of knowledge, NOT to imply that anyone is dumb or anything. Just an FYI post) __________________ 1987 Mutant 4runner\|Slightly Modified\|Lacking general build direction -Lifts and Tires look cool at the Mall, Lockers and Gears look cool on the trail. -Internet Nice Guy

03-17-2009, 03:40 AM	#6 (permalink)
tvaughan Banned Join Date: Mar 2009 Posts: 1	good I am a spammer, and I was banned! Last edited by DeathCougar; 05-15-2009 at 04:26 PM.

05-02-2009, 12:50 AM	#7 (permalink)
kyle82 Registered User Join Date: Apr 2009 Posts: 3	how do we convert the 16 to 17 wheel? are there changes to be done with the interior aside from the wheels themselves? or even the body, how should we take note of the adjustments sir? __________________ personal care, nail care

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10-11-2008, 11:22 AM	#3 (permalink)
Project_Woody Registered User Join Date: Oct 2008 Location: Lakeland, Florida Posts: 16	nice link, ive been tryin to figure out what size my tires were forever now...

12-23-2008, 07:16 PM	#5 (permalink)
Bako88 Registered User Join Date: Feb 2008 Location: Bakersfield, CA Posts: 148	Thanks for that explanation AxleIke. I saved that info for later reference.