The amount you can legally lower your car in Australia varies by state and vehicle type.
Here’s a breakdown:
General Rule:
- Australian Design Rules (ADR) 43: Sets a maximum allowable ground clearance of 100mm (4 inches) for any point under the vehicle within one meter fore and aft of an axle.
State-Specific Regulations:
- New South Wales (NSW): You can legally adjust the ride height by +/-50mm (1.9685 inches) without approval. Larger adjustments require certification.
- Victoria: Similar to NSW, with some additional restrictions for certain vehicle types.
- Queensland: Stricter regulations, generally limiting modifications to +/-50mm.
- South Australia: Follows similar guidelines to NSW and Victoria.
- Western Australia: Regulations are similar to other states, but specific details may vary.
- Other States: Contact your local road authority for accurate information.
Additional Considerations:
- Vehicle Type: The allowable lowering amount may differ based on whether your vehicle is a passenger car, SUV, 4WD, or commercial vehicle.
- Suspension Type: The type of suspension system (e.g., coil springs, air suspension) can also influence the legal limits.
- Other Modifications: If you’ve made other modifications to your vehicle, such as changing wheel size or adding body kits, these can also affect the legal height limits.
It’s important to consult with a qualified mechanic or vehicle modification specialist to ensure that any changes you make comply with local regulations and don’t compromise your vehicle’s safety.
Remember: Lowering your car can affect its handling, ride quality, and ground clearance. Always weigh the benefits against the potential drawbacks before making any modifications.
Written By
Matt Banks
Matt is the founder of Autohero.com.au and has been hooked on cars and repairs ever since childhood. A veteran in automotive since leaving school, Matt has completed his trade as a panel beater and is across all things with wheels.
His first car was a 1967 FORD XR Wagon followed by a string of collectable Holden’s.
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