The first three digits represent the width in millimeters. 245 means 245mm wide, while 265 is 265mm. The second two digits are the aspect ratio, which is the sidewall height as a percentage of the width. So 245/75 means the sidewall is 75% as tall as it is wide. The R stands for radial construction, the standard for modern tires.
--- almost everyone there has been through 265/70's! I ran them for 2 years, just wanted bigger gaterose build thread-- gater has great explanations of 265/70's momo.75's '03 Sport 4.7L V8 Build-- Momo has a good write up with them. Speedo 5% off, ride difference will depend on tire, if u stick with P rated it won't be any difference really.
4448. Better Fuel Economy Factory Ratios Increased Power. 285/70-R19.5 tires are 2.2 inches (56 mm) larger in diameter than 245/70-R19.5 tires and the speedometer difference is 6.3%.
245/75-R17 tires are 0.14 inches (3.5 mm) smaller in diameter than 265/70-R17 tires and the speedometer difference is 0.4%.
In the tire comparison table above, you can see a detailed calculation of the size difference between 265/70 R17 and 255/80 R17 tire. The calculation results are presented in the form of visual infographics, on which tire with size 265/70 R17 is on top, and tire with size 255/80 R17 below. Both in the table and in the graph, the tires are
265/75-R16 tires are 3.11 inches (79 mm) larger in diameter than 245/65-R16 tires and the speedometer difference is 9.8%.
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difference between 265 and 245 tires
