Finding tire diameter in inches

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Finding tire diameter in inches

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Finding tire diameter in inches - 2/5/2006 3:23:22 AM

strongboy2005

Posts: 170
Joined: 1/28/2006
Status: offline

If I have a 235/70-15 tire, what's its diameter in inches? How do you figure that out?

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2003 LS (4-door) Chevy Blazer 4.3L 2WD GU6 G80
http://www.cardomain.com/ride/2257682

Post #: 1

RE: Finding tire diameter in inches - 2/5/2006 9:42:11 AM

Ola Nordmann

Posts: 11
Joined: 10/19/2005
Status: offline

I guess the best way is to mesure it, but I think you can calculate it like this :

The tire is 235mm wide. 235/25.6=9,18 inches
The hight of the tire is 70% of 235mm. (235*70)/100=164.5mm 164.5/25.6=6.43 inches
The diameter og the wheel should be (6.43*2)+15=27.86 inches.

(in reply to strongboy2005)

Post #: 2

RE: Finding tire diameter in inches - 2/5/2006 9:44:55 AM

swartlkk

Posts: 15301
Joined: 5/1/2005
From: Waterloo, NY
Status: online

I use this calculator:
Miata Garage - Tire Size Calculator

or the older version:
Miata Garage - Old Tire Size Calculator

I think that the new calc must have Sun Java installed to work, where the old one does not... Something like that. Either of those will tell you more than what you requested.

*EDIT* - posted at the same time as Norman. Yes, the formulas he gave will work. I just find it easier to plug it in to the calculators above for more information.

< Message edited by swartlkk -- 2/5/2006 9:54:22 AM >

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