The difference between a 60-series and 65-series tire refers to the aspect ratio of the tire. The aspect ratio is a numerical value that represents the height of the tire's sidewall as a percentage of the tire's width.
In the case of a 60-series tire, the aspect ratio is 60, meaning the sidewall height is 60% of the tire's width. For example, if the tire width is 225 millimeters, the sidewall height would be 60% of 225, which is 135 millimeters.
Similarly, a 65-series tire has an aspect ratio of 65, with the sidewall height representing 65% of the tire's width.
Therefore, the key difference between a 60-series and 65-series tire is the height of the sidewall. A 65-series tire would generally have a taller sidewall compared to a 60-series tire of the same width.
A taller sidewall can provide some benefits such as increased ride comfort, improved impact absorption, and better protection against rim damage. On the other hand, a lower aspect ratio tire like a 60-series tire can provide better handling and a sportier appearance due to the shorter sidewall.
It's important to note that the performance and characteristics of a tire are influenced by various factors, including its width, aspect ratio, tread pattern, compound, and construction. So, while the aspect ratio is one aspect to consider, it's not the sole determining factor for a tire's performance.