A single 1000 kg load index tyre can safely carry 1,000 kg (or 1 metric tonne) at its maximum inflation pressure, as per the GSO (Gulf Standardization Organization) standards adopted in the UAE. However, the total axle load capacity for a vehicle is determined by the combined rating of all tyres on that axle. For a typical dual-tyre setup on a light truck's rear axle, this means a combined capacity of 4,000 kg. Actual safe loading is less, as you must account for the vehicle's own kerb weight, passenger weight, and cargo. For instance, a Toyota Hilux Double Cab with a Gross Vehicle Mass (GVM) of 3,000 kg might have a payload of just over 1,000 kg. RTA Dubai's vehicle inspection guidelines consistently flag overloaded vehicles, especially commercial pickups, as a critical safety hazard. A common oversight is using incorrectly inflated tyres for the load; running a fully loaded 4x4 on desert pressure (e.g., 18 psi) on Sheikh Zayed Road can cause rapid overheating and failure. The U.S. Tire Manufacturers Association (USTMA) formula is the industry standard: Maximum Load (kg) = Load Index × 1.1023. For a load index 100 tyre, that's 100 × 1.1023 = 110.23 kg. This is per tyre. A set of four tyres with a 100 load index can collectively support up to 440.92 kg before reaching their maximum load rating. The UAE Ministry of Energy and Infrastructure mandates that vehicle modifications, including tyre upgrades, must not exceed the manufacturer's specified Gross Vehicle Weight Rating (GVWR).
- Key Data Points (for Load Index 100):
- Max load per tyre: 110.23 kg
- Max load for a set of 4: 440.92 kg
- Responsibility: The driver must ensure total vehicle weight (kerb weight + payload) does not exceed the tyre's collective capacity and the vehicle's GVWR.
