Description

This 1,500 kg dropper axle is a practical solution for trailers that need hydraulic braking and a lower deck height. The kit includes cast-iron hydraulic disc hubs paired with matching cast-iron calipers and Geomet-coated rotors for improved corrosion resistance that respects the environment and prevents embrittlement of metal parts. The stub axles are precision-machined for a tight fit to the calipers, ensuring proper alignment and braking response. This axle also includes high-quality Japanese NSK bearings and oil seals with stainless steel back plates - components selected for long-term durability. Fabricated to your supplied dimensions, this axle is well-suited for both new builds and replacements.

Need a custom axle? Use our online axle builder to get a quote. Or let us know your axle dimensions when ordering by email or phone.

Key Features

  • Dropper axle design for reduced trailer deck height
  • Hydraulic disc brakes with cast-iron calipers and Geomet-coated rotors
  • Stub axles machined for tight caliper fit
  • Japanese NSK bearings for high durability
  • Oil seals with stainless steel back plates
  • 5x114.3" PCD hub fitment
  • Fabricated to match supplied dimensions

Applications

  • Low-profile trailers
  • Medium-duty builds requiring hydraulic braking
  • Replacement axles for dropper setups
  • Custom trailers with height constraints

Specifications

  • Axle rating: 1,500 kg
  • Axle type: Dropper
  • Beam: 50x50 mm box section, 5 mm wall thickness
  • Brake type: Hydraulic disc
  • Caliper material: Cast iron
  • Rotor material: Cast iron, Geomet-coated
  • Hub PCD: 5x114.3"
  • Bearings: Japanese NSK tapered roller
  • Oil seal: Stainless steel back plate
  • Axle length: Customisable

Inclusions

  • 65100 Hub Set 1500kg 5x4.5" PCD Braked Hyd Disc Cast Iron – Pair
  • 98030 Box section 50x50 mm 5 mm thickness 2 m length galv
  • 65200 Brake Calipers Cast Iron (pr) suits 1500/1750/2000kg Hub Set
  • 17174 Axle Dropper Plate 100mm suit 39mm Stub 50x50 box

FAQs

Q: What are Japanese NSK bearings?

A: NSK is a world-leading Japanese bearing manufacturer. Their tapered roller bearings are highly regarded for strength, smooth performance, and long service life, offering a clear advantage over generic alternatives.

Q: What braking system is needed to operate the hydraulic disc brakes?

A: This set can be used with a hydraulic override (surge is more common) coupling fitted to the trailer drawbar. You may also opt to install an electric-over-hydraulic kit if you prefer to have more braking options, and if you want the ability to control the brake from inside the towing vehicle.

Our HydroBrake EOH actuator and controller kits are excellent options. Please visit this page to learn more:

https://www.treadway.co.nz/shop/brakes/hydraulic-brake-kits.html

Q: Does the axle include brake pads?

A: Yes. The cast iron calipers are supplied complete with brake pads fitted. Replacement pads are available separately.

Q: What are the advantages of using box section beams for axles?

A: Box section beams (hollow tube axles) offer significant weight savings without compromising strength for most applications. Their lighter construction allows for increased payload capacity, easier handling during installation, and faster fabrication turnaround. They also allow for easy customisation, making them a flexible choice for trailer builders.

Q: What is Geomet surface treatment?

A: Geomet is a water-based zinc–aluminium flake coating, typically used in truck and car brakes. It provides long-lasting protection against rust and corrosion, is highly heat-resistant so it won’t burn off under braking, and is environmentally friendly as it contains no hexavalent chrome or heavy metals. It works through physical barrier protection, galvanic action (where zinc corrodes before steel), and passivation—forming a stable layer that slows further oxidation. This makes it ideal for trailer brake rotors, delivering durability, consistent performance, and reduced maintenance.

Q: What are the benefits of cast iron hubs?

A: Cast iron hubs are a popular choice for trailer braking systems due to their combination of strength, thermal performance, and cost-effectiveness. Here are the key benefits:

High Strength and Load Capacity: Cast iron has excellent compressive strength, making it well-suited for supporting heavy loads without deforming. This makes it ideal for medium- to heavy-duty trailers.

Superior Heat Dissipation: During braking, friction generates heat. Cast iron naturally dissipates heat efficiently, helping to maintain braking performance and reduce the risk of brake fade over time.

Durability and Wear Resistance: Cast iron is highly resistant to wear and abrasion, which contributes to a longer service life—especially important in braking components that experience repeated stress.

Stable Performance Under Load: Its rigidity and dimensional stability under high temperatures ensure consistent braking performance, even during prolonged use.

Specifications

PCD: 5x114.3
Load Rating: 1750kg
Brand: Treadway
Type/Finish: Pre-Galv

Questions?

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