The service description (e.g., “99W”) appears after the tire size on your sidewall. The number is the load index, and the letter is the speed rating.
Load capacity: —
— kg per tire
Speed rating: —
Load Index Reference
| Index | kg/tire | lbs/tire |
|---|
Speed Rating Guide
Standard Ratings
Special Ratings
Z: Above 240 km/h (149+ mph)
(Y): Above 300 km/h (186+ mph)
Important Safety Notes:
- Never use tires with lower load index than recommended – it affects vehicle safety and handling
- Load ratings are per tire – multiply by 4 for total vehicle capacity
- Higher load index tires can be used, but never lower
- Speed ratings indicate maximum safe speed under ideal conditions
- Using tires with improper ratings may lead to poor handling or tire failure
- Consult your vehicle’s manual for manufacturer recommendations