Originally posted by scottd60:
It's all very simple...just do the math.

1st convert "width" mm to "inches" (215mm = 8.464567", 225mm = 8.858268", 235mm = 9.251969")

2nd multiply "width" x "aspect ratio" (50 =.50, 45 =.45, 40 =.40)
sum = "sidewall" (1/2 overall)

3rd multiply "sidewall" x 2 + "wheel diameter" (16", 17", 18")
sum = "tire diameter"



Not as simple as using an online tire calculator .

http://www.1010tires.com/tiresizecalculator.asp?action=submit

1999 SVT Contour 2003 Honda Pilot 2005 Toyota Tundra