What is the stud thread on a Lexus IS250?
The wheel studs on a Lexus IS250 use M12 x 1.5 threads, with a 5×114.3 mm bolt pattern and 60-degree conical lug nut seats. This guide explains what that means for wheels, spacers, and replacements.
Core sizing details you should know
Understanding the IS250’s common wheel-stud and lug-nut sizing helps you shop for wheels and accessories with confidence.
- Wheel bolt pattern: 5x114.3 mm (5 lug holes on a 114.3 mm circle). This is also written as 5x4.5 inches.
- Stud thread size: M12 x 1.5
- Lug nut seat type: 60-degree conical (the typical lug-nut seat used with many Toyota/L Lexus wheels)
- Stud length: OE studs are generally in the 25–30 mm range, but exact length can vary by model year and wheel configuration
- Compatibility note: When changing wheels or adding spacers, ensure the entire mounting system (studs, nuts, wheel seat) matches the 5x114.3 pattern and M12 x 1.5 thread
Conclusion: The IS250 relies on a standardized 5x114.3 bolt pattern and M12 x 1.5 studs, with lug nuts that seat at 60 degrees. Any wheel replacement or spacer must preserve these core specifications to maintain safety and fitment.
How to verify the size on your IS250
If you’re not certain whether your car uses the standard sizing, here are practical verification steps you can take.
- Check the vehicle’s manual or the door jamb sticker for wheel and lug-nut specifications
- Physically measure the lug-stud diameter with calipers to confirm it’s about 12 mm (M12)
- Test the thread pitch using a thread gauge or by attempting to thread a known M12 x 1.5 lug nut onto the studs
- Inspect the wheel seat type by examining the lug-nut contact area and the wheel’s bore and seat shape
- Measure stud length if you need to replace studs or use spacers/wheels with different offsets
Conclusion: Direct measurement and cross-checking against the owner’s manual or OEM parts catalog ensure you don’t mix incompatible studs, lug nuts, or wheels on the IS250.
Shopping tips: replacing studs, wheels, or adding spacers
When sourcing parts or accessories for your IS250, keep these guidelines in mind to maintain proper fitment and safety.
- Look specifically for M12 x 1.5 wheel studs that fit a 5x114.3 bolt pattern
- Prefer OEM or proven aftermarket parts that match the 60-degree lug-nut seating and thread engagement
- Verify wheel compatibility with any spacers or aftermarket wheels (width, offset, and hub bore)
- Follow proper torque specifications and installation procedures for studs and lug nuts
Conclusion: Accurate matching of thread size, bolt pattern, and lug-nut seat is essential for safe wheel mounting on the IS250, whether you’re replacing studs, upgrading wheels, or adding spacers.
Summary
The Lexus IS250 uses wheel studs with an M12 x 1.5 thread and a 5x114.3 bolt pattern, paired with 60-degree conical-seat lug nuts. Always verify these specs for your specific vehicle year and wheel configuration, and consult the service manual or a trusted parts supplier when replacing studs or wheels. This ensures a safe, proper fit and reliable performance on the road.
