The Hub and Stub Kit 275 CI Disc 5x4 1/2x1/2 is a purpose-built, non-braked hub solution designed to upgrade and replace trailer hubs on Duratorque and beam axles, while also offering broad compatibility with many NZ-manufactured trailer axles. With an integrated or bolt-on disc rotor option, this kit provides a robust, ready-to-go foundation for reliable disc braking on your trailer.

• — specifically designed to fit Duratorque and beam axles, with strong compatibility for most NZ manufactured trailer axles. It also aligns with Trojan products, making it a practical choice for rebuilds and upgrades.
• Disc rotor options — choose an integral rotor built into the cast iron hub or a bolt-on rotor in cast iron or stainless steel. The 275 mm rotor diameter is paired with standard caliper mounts sold separately, giving you flexible braking configurations.
• Stud pattern and sizing — 5 studs on a 4 1/2 inch (114.3 mm) PCD with a 1/2 inch stud width, matching the most common wheel rims and tyres in stock.
• Load capacity — rated at 2000 kg GVM per axle (per pair of hubs), providing solid capacity for a wide range of light- to medium-duty trailer loads.
• Stub axles and caliper mount — includes a pair of 38 mm round stub axles with a built-in caliper mounting surface, simplifying alignment and installation.
• Materials and configurations — available in cast iron bolt-on versions (both standard and 5 4 1/2" 67.183 mm options) and stainless steel bolt-on variants (5 4 1/2" 67.183 mm, plus 5 120 mm options), plus integral rotor configurations for streamlined builds.
• What’s included — a complete hub and stub kit with the rotor configuration you select, designed to work with compatible disc brake caliper sets (sold separately).
• Weight and shipping — pack weight approximately 28 kg. Products are shipped from suppliers and typically dispatch within 4–7 days.

Why this kit matters for your trailer

Upgrading to a disc brake hub system like the Hub and Stub Kit 275 CI Disc delivers more confident braking performance, especially in wet or heavy-loading conditions. The 275 mm rotor provides ample stopping power for a single-axle configuration, while the flexible rotor options let you tailor corrosion resistance (stainless options) and maintenance needs to your setup. With a common 5x4 1/2" stud pattern, you can source compatible rims and tyres with ease, reducing downtime during a rebuild or upgrade.

Ideal use cases

• Replacing worn drum hubs on light- to medium-duty trailers that use Duratorque or beam axles, or NZ-manufactured axles.
• Upgrading an older drum brake system to disc brakes for improved braking efficiency and heat dissipation.
• Fleet maintenance where consistent, interchangeable hub components simplify stock and servicing.
• DIY trailer builds needing a reliable, versatile hub kit compatible with Trojan components and common wheel configurations.

For installers and trailer owners seeking a practical, durable path to disc braking, this Hub and Stub Kit delivers clear benefits: straightforward compatibility, flexible rotor configurations, and solid load capacity—paired with the peace of mind that comes from a well-thought-out, NZ-friendly axle solution.