Is 300 F Sport tire size?
The short answer is no: “300 F Sport” is not a tire size. It’s a trim designation used on some Lexus IS models, while tire sizes are specified with numeric markings (for example, 235/40R18) that depend on the year, market, and wheel option.
What does "F SPORT" refer to?
The F SPORT badge signals a performance-oriented package offered by Lexus. It often includes a sport-tuned suspension, distinctive styling cues, and sometimes larger or different wheels and tires compared with base trims. It does not, by itself, indicate a tire size. The actual tire dimensions are determined by the specific wheel package and model year.
How tire sizes are written
Tire sizes on passenger vehicles follow a standardized format that encodes width, profile, construction, and wheel diameter. Understanding these markings helps you compare tires and ensure proper fitment for your vehicle.
What the numbers mean
The core components of a typical tire size look like 235/40R18. Here’s what each part represents:
- Width: the first number (in millimeters) — the distance from sidewall to sidewall.
- Aspect ratio: the second number — the height of the sidewall as a percentage of the width.
- Construction: the letter (R for radial) — indicates how the tire is built.
- Wheel diameter: the final number — the size of the wheel in inches that the tire is designed to fit.
- Load index and speed rating: additional codes (e.g., 94V) that indicate how much weight the tire can carry and the maximum speed it is designed for.
These markings help determine compatibility with your wheels, ride characteristics, and performance expectations.
Where to find the exact tire size for your vehicle
To confirm your specific tire size, rely on official vehicle documentation and direct markings on your tires. The process below guides you to the most reliable source for your model year and market.
- Door placard: Look on the driver’s door jamb or the door itself for the recommended tire size and inflation pressures.
- Owner’s manual or service manual: The manual lists the standard and optional tire/wheel configurations for each trim and year.
- Tire sidewall: The size printed on the tire itself (useful if you’re replacing a single tire or checking a current setup).
- VIN-based fitment guides: When shopping, a tire retailer or dealership can pull exact fitment data for your VIN, ensuring you select the correct size for your wheels and suspension.
Always verify with official sources, especially if you’re changing wheel sizes or upgrading tires, to maintain safety and performance.
Practical guidance for IS 300 F SPORT owners
The Lexus IS 300 F SPORT has spanned several generations and markets, with different wheel options over time. Because of that variability, the exact tire size can differ by year and trim configuration. If you’re replacing tires, start with the OEM-recommended sizes for your exact model year and wheel package, then consider climate and driving style when selecting a tire type (all-season, performance, or winter). A professional tire shop or Lexus dealer can pull the precise specification for your VIN and help you pick appropriate tires that meet load and speed ratings while ensuring proper clearance around braking components and fender arches.
Summary
“300 F Sport” is not a tire size; it denotes a performance-focused trim, most commonly associated with Lexus IS models. To determine the correct tires, rely on the sidewall markings, the vehicle’s door placard, and the official specifications for your exact year and wheel configuration. Tire sizes vary by model year and market, and exact fitment should be confirmed with reliable sources or a tire professional. For IS 300 F SPORT owners, verify current wheel size (18" or 19" configurations are common) and use OEM-recommended sizes as the baseline for replacements.
What size tires are on the Lexus NX300 F Sport?
The Lexus NX 300 F Sport tire size is typically 235/55R18 for recent model years, though some variations may also use 225/60R18. Always check the sticker on the driver's side door jamb or the tire sidewall itself to confirm the correct size for your specific vehicle.
Common tire sizes for the Lexus NX 300 F Sport
- 235/55R18: This is the most common size for the F Sport trim in models from around 2018-2021.
- 225/60R18: This size was also offered as an original equipment size on some F Sport models.
How to confirm your tire size
- Check the driver's side door jamb: There is a sticker there with the original equipment (OE) tire size and recommended inflation pressures.
- Look at the sidewall of your current tire: The tire size is printed on the side of the tire itself, for example, "235/55R18".
What size wheels are on the 2018 Lexus IS300 F Sport?
Deals for your 2018 Lexus IS300 F-Sport AWD
Depending on its year model and trim level, your Lexus IS300 has a range of potential stock wheel sizes, including 17-inch rims, 18-inch rims and 19-inch rims. First generation Lexus ISs also came with an optional 16-inch rim size.
What size tires are on the Lexus IS 300 F Sport?
The Lexus IS 300 F Sport often comes with a staggered setup, meaning different sizes for the front and rear tires. For 2016-2020 models, the front tire size is typically 225/40R18 and the rear is 255/35R18. Newer models may have different sizes, with the 2024 and 2025 F Sport using 235/40R19 for the front and 265/35R19 for the rear. Always check the sticker on the driver's side door jamb for the most accurate information for your specific vehicle.
Common tire sizes
- Front (2016-2020): 225/40R18
- Rear (2016-2020): 255/35R18
- Front (2024-2025): 235/40R19
- Rear (2024-2025): 265/35R19
What size tires are on a Chrysler 300 Sport?
Shop Tires for 2021 Chrysler 300 S Rear-wheel drive | 245/45R20 | Goodyear Auto Service.
