Speed and load ratings
ALL tyres come with a load-rating index and a speed-rating index. What’s important here is that the load rating has to be matched or bettered when replacing a tyre, while the speed rating can be lower than the OEM (Original Equipment Manufacturer) tyre; although, requirements vary state by state. Load and speed ratings are also related to each other, as the speed rating indicates the maximum speed for the tyre when carrying the load indicated by the load rating. A typical load rating for an OEM 4x4 tyre is 110, which means it can carry up to 1060kg. A typical speed rating for an OEM 4x4 tyre is H, which is 210km/h. Speed ratings down to N (140km/h) are generally permissible when replacing the OEM tyres.