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.
Car Tire Sizes Explained: What The Numbers and Letters on Your Tires Mean. The numbers following the first letters -- before the slash (/) -- indicate the section width of the tire; the widest point from sidewall-to-sidewall. The larger this number, the wider the tire. This number is the width of the tire in millimeters.