What size tire is a 1997 SC400?
The typical stock tire size for a 1997 Lexus SC400 is 245/45R17 on 17-inch wheels; some cars came with the earlier 16-inch wheel setup, which used 225/55R16 tires. Exact sizing can vary by wheel package and market, so it’s best to verify on your specific vehicle.
Wheel-size options and tire measurements
The SC400 offered two main wheel configurations during its era, and the following tire sizes correspond to those setups. Always verify on your car, as production changes and regional specs can affect the fitment.
- 17-inch wheels: 245/45R17 (245/45VR17 is also seen; the "R" indicates radial construction and "V/VR" indicates speed rating).
- 16-inch wheels: 225/55R16.
In practice, some SC400 models shipped with 17-inch wheels as standard or optional equipment, while others retained 16-inch wheels. Confirm the exact size by checking the placard on the driver’s door jamb or the owner's manual.
Additional considerations
Beyond the numeric size, pay attention to load rating and speed rating, as well as tire type (summer, all-season, or performance). If you’re replacing all four tires, aim for matching sizes and ratings to preserve handling and stability. Seasonal needs and regional climate may also steer your choice toward a different compound or tread pattern.
Verification steps
How to confirm the correct tire dimension on your specific vehicle:
- Check the door jamb placard on the driver’s side for the listed “Tire size.”
- Consult the owner's manual for the recommended tire size and load/speed ratings.
- Inspect the tire sidewall markings on the tires currently mounted on the car for the exact size (for example, 245/45R17).
Ensuring the tire size matches the vehicle’s specifications helps maintain optimum safety, performance, and ride quality.
Summary
The 1997 Lexus SC400 most commonly used 245/45R17 tires on 17-inch wheels, with an alternative 16-inch configuration of 225/55R16. Since tire fitment can vary by market and optional equipment, always verify the exact size on the door jamb placard or in the owner's manual. When replacing tires, choose the appropriate size, load rating, and speed rating to preserve the car’s performance and safety.
