Welcome to AllJeep.com! We are here to help you get it right...The first time!


	Advanced Search

Calculating Tire Dimensions

Width x Aspect Ratio = Section Height x 2 = Combined Section Height + Rim Diameter = Tire Diameter

Example: 235/70R15

235	= Section width in millimeters
70	= Aspect ratio (ratio of section height to section width)
15	= Rim diameter
R	= Radial Construction B = Bias Construction D = Bias Belted Construction

To calculate:

Tire Width:	Section width divided by 25.4 (Ex: 235 / 25.4 = 9.25")
Section Height:	Tire width times aspect ratio (Ex: 9.25" x 70% = 6.48")
Overall Diameter:	Section height times 2 plus rim diameter (Ex: (6.48" x 2) + 15 = 27.96")

Therefore, a 235/70R15 is approximately 28" tall x 9.25" wide.