Here are the detailed differences and concerns:
Diameter Variance: The diameter of the TD 220 65 R390 97V tire is larger than that of the 215 60 15 tire. Specifically, the TD 220 65 R390 97V tire has a diameter of approximately 830 mm, while the 215 60 15 tire has a diameter of approximately 705 mm. This difference can lead to clearance issues, such as rubbing against the fenders or suspension components. It can also affect the accuracy of the speedometer and odometer readings.
Load Index: The load index of a tire indicates the maximum load it can carry at its specified maximum inflation pressure. The TD 220 65 R390 97V tire has a load index of 97, which means it can support up to 730 kilograms (1,609 pounds). On the other hand, the 215 60 15 tire typically has a load index of 91 or 95, which corresponds to a maximum load capacity of 615 kilograms (1,356 pounds) or 690 kilograms (1,521 pounds), respectively. Using a tire with a lower load index than recommended may result in overloading and potential tire failure.
Speed Rating: The speed rating of a tire indicates its maximum safe operating speed. The TD 220 65 R390 97V tire has a speed rating of V, which means it is designed for speeds up to 240 kilometers per hour (149 miles per hour). The 215 60 15 tire typically has a speed rating of H or T, which corresponds to maximum speeds of 210 kilometers per hour (130 miles per hour) and 190 kilometers per hour (118 miles per hour), respectively. Using a tire with a lower speed rating than recommended can be dangerous, especially at higher speeds.
In addition to the above, the TD 220 65 R390 97V tire has a different width and aspect ratio compared to the 215 60 15 tire. These factors can affect the handling, stability, and fuel efficiency of the vehicle.
For the safety and optimal performance of your vehicle, it is always advisable to consult with a tire professional and use tires that meet the manufacturer's specifications.
