Trojan Hub Kit 5x4.5 Disc Braked 2000kg NZ Trailers

Introducing the Hub Kit 5x4 1/2 Disc Braked 2000kg — a purpose-built hub solution engineered to handle demanding trailer applications with reliability and precision. Designed to fit Duratorque and beam axles, this disc-braked hub kit also suits a wide range of NZ-manufactured trailer axles, delivering confident braking performance and long service life. With a 2000kg GVM rating based on a single axle (and a pair of hubs), this kit is built to support heavier trailer loads without compromise.

Disc-brake design that matters

Disc braking provides smoother, more controllable stopping power, especially on larger trailers. This hub kit places a 275mm rotor as a core component, compatible with standard caliper sets sold separately. Hubs in this range use either an integral disc rotor cast into the hub or a bolt-on disc rotor in cast iron or stainless steel, offering flexibility to suit your preference for durability and maintenance.

Key specifications by variant

• 
  Outer Bore: 45mm • Inner Bore: 65mm • Flange Thickness: 15mm • Flange Diameter: 220mm • Boss Length: 30mm • Rotor Diameter: 275mm • GVM: 2000kg
• 
  Outer Bore: 50mm • Inner Bore: 65mm • Flange Thickness: 15mm • Flange Diameter: 220mm • Boss Length: 30mm • Rotor Diameter: 275mm • GVM: 2000kg
• 
  Outer Bore: 50mm • Inner Bore: 65mm • Flange Thickness: 13mm • Flange Diameter: 190mm (or 260mm depending on variant) • Boss Length: 30mm • Rotor Diameter: 275mm (or 260mm) • GVM: 2000kg

Core compatibility and fit

• 5 studs, PCD 4 1/2 inches (5x4½"), with 1/2" stud width. This aligns with the most commonly stocked rims and tyres in many NZ trailer setups.
• Specifically engineered to fit Duratorque and beam axles, with broad compatibility for NZ-made trailer axles.
• Available in disc-integrated or bolt-on rotor configurations, plus a spigot option to suit different spindle setups.

What you’ll notice on the road

• Enhanced braking response and modulation thanks to the 275mm rotor diameter giving more leverage and stopping power for heavier trailers.
• Consistent performance across common trailer loads, aided by a robust cast-iron hub design and compatibility with standard caliper sets (sold separately).
• Flexible installation options with multiple bore and flange configurations to match your existing axle geometry.

Practical considerations and support

There’s a range of spare parts available for this hub kit, ensuring you can service and maintain the system over time. Hubs are shipped from suppliers and typically dispatch within 4–7 days. For shipping arrangements, please contact us to arrange the details.

Who this is for

This hub kit is ideal for trailer builders, fleet managers, caravan and boat trailer owners, and anyone upgrading to reliable disc-braked performance on Duratorque, beam, or NZ-manufactured trailer axles. If you’re looking to improve braking performance, compatibility with common rims, and a robust GVM rating, this 2000kg disc-braked hub kit is designed to meet those needs with precision.

Material and construction choices (cast iron hub with integrated or bolt-on rotor, available in stainless variations) are designed to deliver long service life in demanding road conditions, while keeping maintenance practical with widely available caliper components.