Lexus SC Tyre Size Guide (All Generations)

Factory Wheel Specs, Centre Bore, Torque Settings | Autosport Tyre World

The Lexus SC is a premium grand touring coupe and convertible, combining performance with luxury. This guide covers all factory tyre sizes, wheel specifications, centre bore, and torque settings for both generations: SC300/SC400 (Z30) and SC430 (Z40).

Lexus SC300 / SC400 (Z30) – 1991–2000

Factory Tyre Sizes

• 225/55R16
  
• 225/50R17 (optional upgrade)

Factory Wheel Specifications

• 16x6.5J ET +50
• 16x7.0J ET +50
• 17x7.5J ET +50
• PCD: 5x114.3
  

Centre Bore

• 60.1 mm

Wheel Nut / Bolt Torque

• 103 Nm (76 ft-lbs)

Lexus SC430 (Z40) – 2001–2010

Factory Tyre Size

• 245/40R18

Factory Wheel Specifications

• 18x8.0J ET +45
• PCD: 5x114.3
  

Centre Bore

• 60.1 mm

Wheel Nut / Bolt Torque

• 103 Nm (76 ft-lbs)

Performance Tyre Recommendations

For Lexus SC owners looking to upgrade performance, comfort, or handling, here are proven options:

Daily Comfort / Touring

• Continental UltraContact UC7
  https://autostw.com.au/search?type=product&q=Continental+UC7

Balanced Performance

• Continental MaxContact MC7
  https://autostw.com.au/search?type=product&q=Continental+MC7

High Performance / Sports Driving

• Continental SportContact 7
  https://autostw.com.au/search?type=product&q=Continental+SC7

Fitment Notes

• The Lexus SC uses a 5x114.3 PCD, making it compatible with a wide range of aftermarket wheels.
• Centre bore is 60.1 mm, so hub-centric rings may be required for aftermarket wheels.
• SC430 comes factory with staggered-capable platform, but OEM setup is square.
• Always ensure load rating and speed rating match OEM specifications.
• Lower profile tyres (e.g., 18” upgrades on SC300/400) improve handling but may reduce ride comfort.

Common Customer Questions

Can I upgrade from 16” to 18” wheels on SC300/SC400?

Yes. Common upgrade sizes include:

• 225/40R18
• 235/40R18
  Ensure rolling diameter remains close to OEM.

Is SC430 a staggered setup?

Factory is square (245/40R18), but staggered setups are commonly used:

• Front: 235/40R18
• Rear: 265/35R18

What tyre is best for comfort?

Continental UC7 is ideal for quietness and daily driving.

What tyre is best for performance?

Continental SportContact 7 offers excellent grip and braking performance.

Why Choose Autosport Tyre World

At Autosport Tyre World, we specialise in Lexus fitments, performance tyres, and precision installation.

Our Locations:

• 647 Magill Road, Magill SA 5072 – 0452 641 023
• 411 Grand Junction Road, Wingfield SA 5013 – 0433 645 411
• 911 South Road, Clarence Gardens SA 5039 – 0420 299 911