While it's technically possible to mix T and H rated tires, it's generally not recommended for several reasons: Handling Imbalance: Mixing tires with different speed ratings can lead to inconsistent handling characteristics, which could be dangerous in emergency situations. Different Wear Rates: H-rated tires typically wear faster than T-rated tires, which could lead to uneven wear across your vehicle's tires. Reduced Performance: Your vehicle's performance will be limited to the capabilities of the lower-rated tire. Potential Insurance Issues: Some insurance policies may be invalidated if you mix tire types. Manufacturer Recommendations: Most vehicle manufacturers recommend using the same type of tire on all four wheels. If you absolutely must mix tire types due to an emergency situation, it's best to put the higher-rated tires (in this case, the H-rated tires) on the rear axle. However, this should only be a temporary solution until you can replace all tires with a matching set.