Tire size Chart
Thread Starter
Safety Car
Joined: Nov 2008
Posts: 3,717
Likes: 551
From: Seattle Washington
Tire size Chart
Searching the Web I have found a number of Tire size Charts but there is always something wrong with them. Most of the Big Tire Stores only cover the Tires they have in stock. The Manufactures sites are the worst, they sometimes can't even find there own tire that I have now. I found one site that had all kinds of tire sizes and I thought I had it made untill I found that no body made most of the sizes. Any body know of a good one?
Race Director
Joined: Mar 2008
Posts: 15,161
Likes: 17
From: coffee
You can always calculate it yourself.
Take the section width (255, for example) and divide it by 25.4 (number of millimeters in an inch) then multiply the result by the aspect ratio (60 = .60) and multiply by 2 for two sidewalls, then add the rim diameter.
so, a 255/60/15 (optional stock size on C3's) tire would be:
(255/25.4 x 0.6 x 2) + 15 = 27.047 inches
Other common tires this height are 235/55/17, 255/50/17, and 255/45/18
Take the section width (255, for example) and divide it by 25.4 (number of millimeters in an inch) then multiply the result by the aspect ratio (60 = .60) and multiply by 2 for two sidewalls, then add the rim diameter.
so, a 255/60/15 (optional stock size on C3's) tire would be:
(255/25.4 x 0.6 x 2) + 15 = 27.047 inches
Other common tires this height are 235/55/17, 255/50/17, and 255/45/18
Drifting
Joined: Jan 2008
Posts: 1,962
Likes: 5
From: Schererville IN
The problem with the all in one tire calculators is that some sizes, normaly the size you want, aren't even made.
I also like this tool:
http://www.miata.net/garage/tirecalc.html
Le Mans Master
Joined: Sep 2004
Posts: 5,116
Likes: 5
From: Livonia MI
I usually go to the Tire Rack site, pick out a tire size, manufacturer I'm familiar with, and check/print out the spec sheet. Quite easy comparing other tire specs, like O.D, section and tread width from there.
Intermediate
Joined: Aug 2007
Posts: 25
Likes: 0
Thread Starter
Safety Car
Joined: Nov 2008
Posts: 3,717
Likes: 551
From: Seattle Washington
You can always calculate it yourself.
Take the section width (255, for example) and divide it by 25.4 (number of millimeters in an inch) then multiply the result by the aspect ratio (60 = .60) and multiply by 2 for two sidewalls, then add the rim diameter.
so, a 255/60/15 (optional stock size on C3's) tire would be:
(255/25.4 x 0.6 x 2) + 15 = 27.047 inches
Other common tires this height are 235/55/17, 255/50/17, and 255/45/18
Take the section width (255, for example) and divide it by 25.4 (number of millimeters in an inch) then multiply the result by the aspect ratio (60 = .60) and multiply by 2 for two sidewalls, then add the rim diameter.
so, a 255/60/15 (optional stock size on C3's) tire would be:
(255/25.4 x 0.6 x 2) + 15 = 27.047 inches
Other common tires this height are 235/55/17, 255/50/17, and 255/45/18
