Ark 70 mm Heavy Duty Tow Ball — 4500 kg Rated Plain Steel

Take on serious towing with the Ark 70 mm plain steel tow ball. With a 4.5 ton (4500 kg) rating and heavy-duty 1 1/4" shank, this tow ball is built for big loads, wide couplings and tough conditions. Whether towing large caravans, horse floats or heavy trailers, it offers reliable performance and compliance with Australian standards.

Key Features

• Ball Diameter: 70 mm — designed for larger trailer couplings.
• Towing Capacity: 4500 kg / 4.5 ton rating for heavy-duty applications.
• Shank Diameter: 1 1/4" (31.75 mm).
• Shank Length: 68–70 mm for secure mounting.
• Material: Plain steel for maximum strength and durability.
• Finish: Standard plain steel surface with protective chrome-like appearance.

Why Choose This Tow Ball

Standard 50 mm balls won’t cut it for extreme towing loads. The Ark 70 mm tow ball provides the capacity needed for heavy vans, large boats or industrial trailers. Its larger shank ensures better strength transfer, reducing wear and enhancing safety during long hauls.

Installation & Safety Tips

1. Check that your towbar and coupling are rated for 70 mm tow balls and 4500 kg towing.
2. Install the tow ball using the correct torque as per towbar manufacturer recommendations.
3. Regularly inspect for signs of wear, rust or scoring, particularly after towing heavy loads.
4. Ensure coupling is fully engaged on the ball before moving off.

Good To Know

• Specifically designed for larger couplings requiring 70 mm balls.
• Provides extra towing strength compared with standard 50 mm tow balls.
• Built by Ark, trusted for reliable towing parts in Australia for over 30 years.