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What size tires are on a Lexus GS300?

The tire size for a Lexus GS300 is not fixed across all years and trims; it varies by generation, market, and wheel package.


The GS300 was produced across several generations with multiple wheel sizes, typically ranging from 16 to 18 inches. To determine the exact size for a specific car, check the door jamb placard, the owner's manual, or the tire sidewall. The sections below outline representative sizes you might encounter, though your exact car may differ.


Common tire sizes by wheel diameter


Note: The sizes listed below reflect typical factory configurations for many GS300 models. Exact specifications can vary by year, market, and optional packages.


16-inch wheels


For GS300 models equipped with 16-inch wheels, the common tire sizes include 205/60R16 and 225/60R16. Some markets or trims may have other 16-inch options.



  • 205/60R16

  • 225/60R16


Conclusion: If your GS300 has 16-inch wheels, these sizes are among the most frequently encountered; always verify the placard or tire sidewall for the exact match.


17-inch wheels


Many GS300 configurations use 17-inch wheels with a typical factory size of 235/45R17. Some variations or market-specific trims may use similar sizes in the 17-inch range.



  • 235/45R17

  • 235/50R17


Conclusion: For most late-2000s GS300 models with 17-inch wheels, 235/45R17 is the standard size; confirm on your vehicle’s placard to be certain.


18-inch wheels


Some GS300 models offered 18-inch wheels, with common sizes including 235/40R18 or 235/45R18 depending on the specific tire package and market.



  • 235/40R18

  • 235/45R18


Conclusion: If your GS300 has 18-inch wheels, these are typical possibilities; checking the door placard or owner’s manual will provide the exact specification.


Important note: If your GS300 is a non-U.S. market version or belongs to a different generation, tire sizes can differ substantially. Always verify the exact size with the door placard, the owner’s manual, or the tire sidewall for the replacement you should use.


Summary: There isn’t a single tire size for all Lexus GS300 models. Typical factory sizes span 16" (205/60R16 or 225/60R16), 17" (235/45R17, with some variations), and 18" (235/40R18 or 235/45R18) depending on year, trim, and market. For an accurate fit, check the vehicle’s placard or manual.

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Kevin Bennett

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Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.