S-10 Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
393 Posts
eg 215/55/15

215 is the width of the tire in mm's

the 55 is the aspect ratio of the tire.

Sample calculation

215MM X .55 = 118.25MM (section width from top of rim to top of tire) 118.25MM X 2 = 236.5MM (because there are two sections for the tire) + the diametre of the rim 15"= 381MM

Total size of tire: 617.5mm, in inches 24.31"


with different aspect ratios the section width will change. 55 series will have a smaller section width then say a 70 series.

to calculate mm from inches multipy inches by 25.4
to calculate inches from mm's divide by 25.4
 

·
Deadbeat
Joined
·
1,331 Posts
wow i always new what the numbers where but that calcuation is so simple! that helped me out alot thanks!
 
1 - 5 of 5 Posts
Top