What size tires are on a Lexus rx400h?
The stock tire size for most Lexus RX 400h models is 235/55R18 on 18-inch wheels.
The RX 400h, Lexus's early hybrid SUV, was produced from 2005 through 2009. In that era, the majority of RX 400h vehicles shipped with 18-inch wheels wrapped in 235/55R18 tires, with variations possible depending on market, trim level, and optional wheel packages. When replacing tires, it's important to match the OEM size to maintain handling, ride quality, and speedometer accuracy.
Common stock tire size for the RX 400h by year
Factory-issued tire sizes for the RX 400h are typically uniform across the model years, but buyers should verify on their specific vehicle as wheel upgrades or regional variations can occur.
- 2005–2009 Lexus RX 400h: 235/55R18 tires on 18-inch wheels (front and rear the same size).
Note that some markets or optional wheel configurations could vary, but the 235/55R18 pairing is the standard for the majority of RX 400h units.
How to verify your exact tire size
To confirm the correct size for your specific vehicle, check these sources:
- Driver’s door jamb placard: It lists the original equipment tire size for the vehicle as built by the factory.
- Tire sidewall: The size is printed on the tire itself (example: 235/55R18).
- Owner’s manual or dealer: The manual or a Lexus dealership can confirm the exact OE size using your VIN.
- Vehicle Identification Number (VIN): Sharing your VIN with a dealer or Lexus customer service can retrieve the original equipment specs for your car’s build date and market.
When replacing tires, start with the OEM size for best compatibility unless you are intentionally changing wheel diameter and have proper clearance and calibration for the speedometer.
Summary
In short, the typical stock tire size for the Lexus RX 400h is 235/55R18 on 18-inch wheels, applicable to most 2005–2009 models. Always verify via the door placard or the owner's manual, because regional variations or aftermarket modifications can alter the size. Using the OEM size ensures proper handling, comfort, and instrumentation accuracy.
