What lug bolt pattern IS300?
The IS300 uses a 5x114.3 mm lug pattern (five lug holes on a 114.3 mm bolt circle).
For wheel shoppers and owners, understanding this pattern is essential for choosing compatible wheels, whether you’re swapping to aftermarket rims or re-fitting winter wheels. This article breaks down what the IS300’s lug pattern means, including related specs and practical verification steps for different model years and markets.
Pattern fundamentals for the IS300
The IS300’s lug arrangement is defined by five studs arranged on a 114.3 millimeter bolt circle. The hub bore is typically around 60.1 millimeters, which can influence whether center rings are needed for aftermarket wheels. Lug nuts use a standard M12×1.5 thread with a 60-degree conical (tapered) seat to secure the wheel.
What the numbers mean
In simple terms, 5x114.3 means five lug holes spread evenly around a circle with a diameter of 114.3 mm. This pattern is widely shared among Toyota/Lexus models, enabling a broad range of wheel options. However, compatibility also depends on hub bore size, wheel offset, and caliper clearance, so always verify these factors for your specific car.
To help car owners and wheel shoppers assess compatibility, the following core specs apply to the IS300 family.
Before listing the key specs, note that variations in market and model year can affect minor details; always confirm with your wheel supplier or dealership if in doubt.
- Bolt pattern: 5x114.3 mm (five lug holes on a 114.3 mm circle).
- Hub bore: typically 60.1 mm; if a wheel has a larger bore, a centering ring may be required for proper fit and centering.
- Lug nuts: M12×1.5 thread with a 60-degree conical seat; use the correct lug nuts specified for the wheel type (steel vs. aluminum) and wheel manufacturer guidelines.
- Eligible models: IS300 sedan (and IS300 SportCross wagon) from the first generation, generally 2001–2005 in the US and similar years in other markets; in some markets the car is referred to as Altezza or IS200/IS300 depending on trim and year.
- Aftermarket considerations: Most 5x114.3 wheels fit, but verify brake clearance, offset (ET), and hub-centric requirements; some wheels may require rings or spacers, and certain brake kits can affect fitment.
In short, if you own an IS300 or are buying wheels for one, the standard 5x114.3 bolt pattern is the foundation to check, along with hub bore and offset, to ensure a proper, safe fit.
Generational and market notes
US-first generation IS300 (2001–2005)
In the United States, the IS300 is part of the first-generation IS lineup and uses the 5x114.3 pattern. Wheel catalogs for this generation typically show 5x114.3 and will indicate hub bore and offset requirements for stock and aftermarket wheels.
Global context
Across markets, the IS300 is closely related to the Altezza in Japan, and the broader Toyota/Lexus family has largely standardized on the 5x114.3 bolt pattern for the IS/Altezza line through multiple generations, although some exceptions exist in certain trims or markets. Always verify your specific VIN and model year for precise specs.
How to verify on your own car
To be certain a wheel will fit, confirm these factors: the 5x114.3 bolt pattern, the hub bore, the lug nut type, and the wheel offset. When buying used wheels, request exact part numbers and confirm with a dealer or tire shop. If necessary, use hub-centric rings or spacers designed for the 5x114.3 pattern to ensure proper centering and clearance.
Conclusion
The IS300’s lug pattern is a straightforward 5x114.3 mm, a familiar standard for many Toyota and Lexus models. With the right offset and center bore considerations, you can confidently mix and match wheels and tires across this family of vehicles.
Summary: The IS300 uses a 5-lug, 114.3 mm bolt circle, hub bore around 60.1 mm, and M12x1.5 lug nuts with a 60-degree conical seat. Verify offset and clearance for your specific wheel and market to ensure a safe, proper fit.
