Tire Load Index
Tires & Wheels · 7 specs
Direct Answer
The Tire Load Index (standardized under ISO 4000-1) is a numerical code assigned to a passenger or commercial tire indicating the maximum physical weight (in kilograms and pounds) the tire can carry when inflated to its maximum operating cold tire pressure. Spanning Load Index 70 (335 kg / 739 lb) to Load Index 120 (1400 kg / 3086 lb) per tire.
Source: ISO 4000-1 / ETRTO Standards Manual / US DOT Standards · Last reviewed Aug 28, 2026
Specs
| Standardization | ISO 4000-1 / ETRTO / TRA Load Tables |
| Standard Load (SL) Pressure | Calibrated at 2.5 bar (36 psi) cold inflation pressure for passenger car tires |
| Extra Load (XL / Reinforced) | Reinforced internal carcass calibrated at 2.9 bar (42 psi) for heavy electric vehicles (EVs) and SUVs |
| Common Passenger Load Indices | LI 82: 475 kg (1,047 lb) | LI 88: 560 kg (1,235 lb) | LI 91: 615 kg (1,356 lb) | LI 95: 690 kg (1,521 lb) |
| Heavy EV & SUV Load Indices | LI 100: 800 kg (1,764 lb) | LI 104: 900 kg (1,984 lb) | LI 108: 1,000 kg (2,205 lb) | LI 112: 1,120 kg (2,469 lb) |
| Vehicle Axle Calculation | Sum of two tire load capacities on an axle must exceed the Gross Axle Weight Rating (GAWR) |
| HL (High Load) EV Benchmark | New standard for heavy battery packs carrying higher load at equivalent tire volume and pressure |
Electric Vehicles and Extra Load (XL) Tires
Because electric vehicles carry massive 500 to 800 kg battery packs, they require higher load index tires. A standard sedan tire with Load Index 91 holds 615 kg (2460 kg total across 4 tires), whereas an EV-specific Extra Load (XL) 95 tire holds 690 kg (2760 kg total), resisting sidewall flex during hard regenerative braking and cornering.