Ford Focus Forum, Ford Focus ST Forum - View Single Post - setup/compatability/tire question
View Single Post
Old 11-10-2012, 12:37 PM   #3
Focus Enthusiast
Neptune15's Avatar
Join Date: Nov 2011
Fan#: 91691
Location: Hamilton, Canada
What I Drive: '07 ZX3

Posts: 213
FF Reputation: 1 Neptune15 Good Standing Member
Buy-Sell-Trade Rating: (0)
If you have a tire that is, say, 205/45/17.

The 205 represents the width of the tire in millimeters.

The 45 represents the height of the sidewall relative to the tire width, from the rim to the edge of the tread. It's a percentage, so 45 would be 45% of 205mm, which would mean the sidewall is 92mm high (0.45 x 205mm = 92mm).

The 17 is the wheel diameter in inches.
Neptune15 is offline  
    Reply With Quote