Mostly cloudy this morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms this afternoon. Much warmer with highs in the mid 70s. Southwest winds around 5 mph. Chance of rain 50 percent.
XL means Extra Load range which indicates the tire has a higher Load Index and Maximum Inflation Pressure (usually 51 psi instead of 44 psi) than a Standard Load range tire of the same size.
The aspect ratio indicates the height of the tire's cross-sectional profile. It is expressed as a percentage of the tire's width, so an aspect ratio of 55 means the tire's cross-section is 55% as high as it is wide. This number indicates the overall height of a tire measured in inches when the tire is inflated.