Which tire is taller, 245 or 265?
Height and Diameter: Because the sidewall height is a percentage of the width (the aspect ratio), a 265 tire will be taller than a 245 of the same series. For example, a 265/45R18 is roughly 0. R18. The most prominent information on a tire sidewall is the tire size. Passenger car tire sizes are expressed with a series of numbers and letters, such as 225/50R16. Here’s what each part represents: 225 is the width of the tire in millimeters from sidewall to sidewall.
Which tire is taller, a 65 or 70?
These numbers show the aspect ratio, which is the tire sidewall height in percentage to width of the tire. The width of Sidewall is directly proportional to the aspect ratio, a 70 aspect ratio means the sidewall height is 70% of 265mm while 65 aspect ratio means it is 65% of 265mm. The 45-50 number is the aspect ratio of the tire, bigger the number the larger the sidewall. Though in this case, the difference is small, around an inch, but still affects final drive ratio as other have mentioned. At low speeds probably off by 1mph and difference increases to 2mph or so at highway speeds.