Trojan Trailer Parts: 8 Top Picks and Where to Buy in NZ
Towing in NZ throws the lot at your trailer: salt, steep ramps, long hauls to the bach, and the odd corrugated back road. When a bearing runs hot, a jockey wheel collapses, or the lights give up on the way to the ramp, you need parts you can trust — and you often need them fast. The challenge isn’t finding Trojan trailer parts; it’s picking the right spec: 1 7/8" vs 50 mm couplings, LM vs SL bearings, 5‑stud vs 6‑stud hubs, mechanical vs hydraulic brakes, correct roller sizes and brackets.
This guide cuts the guesswork. We’ve shortlisted eight Trojan essentials for NZ boat, box and caravan trailers — why they’re standouts, what to check before you buy, typical price ranges, and exactly where to get them locally and online. We’ll also point you to Action Outdoors, a trusted NZ retailer, alongside other stockists, so you can match part numbers with confidence and get back on the road (and water) sooner.
1. Action Outdoors: where to buy Trojan trailer parts in NZ
If you want the right Trojan part first time, Action Outdoors makes it easy. As a NZ retailer with an Auckland store and a full online catalogue, they stock go-to Trojan categories — couplings, hubs and bearing kits, brake components, lights and wiring, rollers, suspension hardware, and jockey wheels — so you can match specs and get moving fast.
Why this is a top pick
Action Outdoors combines local knowledge with breadth of range, so you can cross-check part numbers and specs across common NZ setups (1 7/8" and 50 mm couplings, LM/SL bearings, 5- and 6-stud hubs). Handy for urgent trailer fixes before a launch or long haul.
Best for
- Boat, box, and caravan trailers: Everyday maintenance and upgrades.
- DIY owners and tradies: Quick source for Trojan trailer parts you can pick up or have delivered.
- Saltwater use: Galvanised and marine-friendly options across brakes, rollers, and lighting.
What to check before buying
- Couplings and tow balls: Confirm size (1 7/8" or 50 mm) and rating.
- Hubs/bearings: Match stud pattern, seal type, and LM vs SL bearing sets.
- Brakes: Mechanical vs hydraulic compatibility, cable/line lengths, and caliper type.
- Suspension: Leaf spring length/eye type, u-bolt size, and axle capacity.
- Rollers/brackets: Diameter, width, and bracket style for your keel/wobble setup.
- Lighting: LED vs bulb, 12V plug type, and loom length.
Where to buy in NZ
Shop Action Outdoors online or in-store in Auckland. Other NZ stockists carrying Trojan components include Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and Trojan’s own channels.
Typical price range
Expect pricing to scale with complexity: from low-cost hardware (u-bolts, pins, cables) to higher-ticket assemblies (complete brake kits, hub sets, heavy-duty jockey wheels). Marine-grade and heavy-duty specs sit at the premium end; check current pricing online or in-store.
2. Trojan couplings and tow balls
If your coupling doesn’t match your tow ball, you’re risking wear, noise, and a roadside drama. Trojan’s range covers the NZ staples — 1 7/8" and 50 mm — plus braked and unbraked options, so you can spec the right connection from the drawbar forward and tow with confidence.
Why this is a top pick
Trojan couplings are a go-to in NZ because they align with common local setups and are easy to match by ball size and load rating. The lineup spans simple unbraked couplings through to override styles for braked trailers, making upgrades and replacements straightforward.
Best for
- Boat and box trailers: Reliable unbraked couplings for everyday towing.
- Heavier or braked rigs: Override/mechanical options paired with Trojan brake kits.
- Mixed fleets: Clear size markings make it simple to standardise on 1 7/8" or 50 mm.
What to check before buying
- Ball size and rating: Confirm 1 7/8" or 50 mm and the coupling’s stamped load rating matches your trailer’s GVM.
- Brake type: Unbraked vs override/mechanical (and cable compatibility) to suit your brake system.
- Mounting fit: Drawbar size, hole centres, and bolt size match your existing tongue/mount.
- Wear items: Latch condition, pivot pins, and the need for a coupling lock or safety chain upgrades.
- Compliance: Check the rating plate and markings align with NZ requirements.
Where to buy in NZ
Action Outdoors stocks Trojan couplings and tow balls online and in-store in Auckland. You’ll also find Trojan trailer parts at NZ retailers such as Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
Tow balls and basic unbraked couplings sit at the entry end; heavy-duty or override/mechanical couplings cost more. Stainless/galv finishes and integrated brake hardware add to price. Check current pricing with your chosen NZ retailer.
3. Trojan jockey wheels
A tired jockey wheel is the quickest way to hate every launch, park and push. Trojan jockey wheels are built for exactly what Kiwi trailers see — frequent height adjustments, saltwater ramps, gravel, and the odd “hand‑tow” across grass — so your drawbar stays supported and controllable.
Why this is a top pick
Trojan’s range covers common NZ needs with clamp-on and bolt-on options, swing-up assemblies, and wheels suited to hardstand or softer ground. Clear ratings and robust construction make it easier to match capacity to your trailer and keep manoeuvring predictable and safe.
Best for
- Boat trailers on ramps: Swing-up, corrosion-resistant setups for fast retrievals.
- General box and utility trailers: Simple clamp-on units for dependable height control.
- Heavier caravans/loads: Higher-capacity, solid-wheel options that won’t squirm under weight.
What to check before buying
- Capacity: Match the jockey wheel’s rating to the trailer’s drawbar load, not total GVM.
- Mounting style: Clamp-on vs bolt-on, and whether your drawbar size suits the clamp.
- Wheel type: Solid for hard surfaces and higher loads; pneumatic for softer ground and easier rolling.
- Travel and handle clearance: Ensure enough lift/lower range and no fouling on winch posts.
- Corrosion resistance: Galvanised or marine-friendly finishes for salt environments.
Where to buy in NZ
Action Outdoors stocks Trojan jockey wheels online and in-store in Auckland. You’ll also find Trojan trailer parts via Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and Trojan’s own channels.
Typical price range
Entry-level clamp-on wheels cost less; swing-up, heavy-duty and marine-focused units cost more. Wheel type, capacity, and finish drive price — check current listings with your chosen NZ retailer.
4. Trojan hubs and bearing kits
Salt, heat and heavy loads punish hubs and bearings more than most trailer parts. Trojan’s hubs and matched bearing kits make it simple to refresh tired running gear with components that suit common NZ stud patterns and seal types, so you roll smoother, cooler and safer on every trip.
Why this is a top pick
Trojan packages the bits that matter — bearings, cups, seals, dust caps and hardware — so you’re not guessing IDs in the carpark. Their hub range covers unbraked (lazy) hubs and brake-compatible hubs, with galvanised options and marine-friendly seals that stand up to ramp dunkings and long highway runs.
Best for
If you want fewer variables and easier servicing, this is the smart upgrade path.
- Boat trailers: Galv hubs and marine seals that cope with regular saltwater immersion.
- Box/utility trailers: Reliable lazy hubs and complete kits for quick weekend fixes.
- Caravans/heavier rigs: Hubs that integrate with drum or disc brake setups.
What to check before buying
Get your measurements and compatibility right before you press in a single cup.
- Bearing type: Match LM vs SL sets to your axle’s inner/outer diameters.
- Stud pattern and offset: Confirm PCD, stud count (5 or 6) and wheel fitment.
- Seal style: Standard vs marine seals to suit your environment and hub shoulder.
- Axle capacity: Ensure the hub and bearings meet or exceed the trailer’s rating.
- Brake compatibility: Lazy hub vs drum/disc hub if you run or plan to add brakes.
- Accessories: New dust caps, split pins, axle nuts and quality marine grease.
- Installation: Pre-greased convenience vs DIY pack-and-fit with correct preload.
Where to buy in NZ
Action Outdoors stocks Trojan hubs and bearing kits online and in-store in Auckland. You’ll also find Trojan trailer parts at Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
Bearing kits are the budget-friendly fix; complete hub assemblies cost more, and brake-compatible or galvanised options sit higher again. Marine seals and heavy‑duty specs add a premium. Check current pricing with your chosen NZ retailer.
5. Trojan brake kits, calipers and cables
Brakes are where confidence lives. Trojan’s brake range covers the essentials NZ trailers rely on: drum and disc setups, matching calipers, shoes/pads, and mechanical brake cables with the fittings to tie it all together. Whether you’re restoring stopping power or upgrading worn hardware, the matched-system approach keeps things simple and safe.
Why this is a top pick
Trojan bundles compatible parts so your hub/brake/caliper/cable choices work as a system, cutting guesswork at the ramp or on the driveway. With widespread NZ availability of spares, you can service pads, shoes and cables quickly and keep the trailer roadworthy between big trips.
Best for
- Boat trailers: Reliable stopping after frequent dunkings and long motorway runs.
- Box and trade trailers: Straightforward drum-brake refreshes for daily hauling.
- Caravans and heavier rigs: Disc-and-caliper options for firmer, more consistent braking.
What to check before buying
- Brake style: Choose drum vs disc to suit your existing hubs (or planned hub swap).
- Actuation type: Mechanical override setups need correctly sized Trojan brake cables and clevis ends.
- Axle and load rating: Match brake components to (or above) the trailer’s rated capacity.
- Fitment: Caliper mounting pattern/offset, drum size, and backing plate orientation (left/right).
- Wheel clearance: Ensure rims clear calipers/drums under full lock and bump.
- Corrosion resistance: Prefer protective finishes and quality hardware for salt exposure.
- Service parts: Confirm pad/shoe sizes and spring kits for future maintenance.
- Compliance: Check rating plates and markings align with NZ requirements.
Where to buy in NZ
Action Outdoors stocks Trojan brake kits, calipers and cables online and in-store in Auckland. You’ll also find Trojan trailer parts at Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
- Cables, pads/shoes: Entry-level spend.
- Calipers, drums/rotors and backing plates: Mid-tier.
- Complete brake kits: Highest outlay, but best for a one-and-done refresh. Check current pricing with your chosen NZ retailer.
6. Trojan suspension: leaf springs, u-bolts and hangers
If your trailer rides harsh, sits crooked, or chews through tyres, the suspension is usually to blame. Trojan’s leaf springs, u-bolts and hanger hardware let you restore correct ride height, axle alignment and load control with proven components that suit common NZ boat, box and caravan trailer setups.
Why this is a top pick
Trojan’s suspension range matches typical NZ configurations — slipper and eye-to-eye leaf springs, square or round axle u-bolts, and straightforward hangers and shackles — so you can refresh worn parts without reinventing your running gear. Galvanised and heavy-duty options help trailers survive salt and metal roads alike.
Best for
- Boat trailers: Galv-friendly springs and hardware that cope with saltwater dunkings.
- Box/utility trailers: Durable, easy-to-service leaf packs for daily hauling.
- Caravans/tandems: Matching springs, equaliser kits and hangers for stable tracking.
What to check before buying
Get your measurements and configuration right before ordering suspension parts.
- Spring type: Slipper vs eye-to-eye (shackle) to match existing hangers.
- Length and camber: Eye-to-eye/overall length and free camber to maintain ride height.
- Capacity: Axle/trailer rating and leaf count to suit actual load.
- Bushes and pins: Bush material (nylon/bronze) and pin diameter/length for a snug fit.
- Centre bolt location: Matches your axle’s locating plate.
- U-bolts: Shape (square for box axles, round for round axles), diameter, leg length and thread.
- Plates/hangers: Hole centres and thickness; check for ovalled holes needing replacement.
- Tandems: Equaliser length and hanger spacing to keep axles aligned.
- Finish: Galvanised/coated hardware for marine use; use anti-seize on reassembly.
- Torque and alignment: Correct u-bolt torque and square axle set to avoid tyre scrub.
Where to buy in NZ
Action Outdoors stocks Trojan suspension parts online and in-store in Auckland. You’ll also find Trojan trailer parts at Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
Individual bushes, pins and u-bolts are the low-cost refresh; full leaf packs and complete hanger/equaliser kits cost more. Galvanised and heavy-duty specs sit higher. Check live pricing with your chosen NZ retailer.
7. Trojan rollers and brackets
Smooth launching and retrieval starts under the hull. Trojan rollers and brackets keep the keel centred, spread the load and protect gelcoat, even on steep NZ ramps and rough beach approaches. With corrosion-resistant hardware and sizes that suit common Kiwi trailer frames, they’re a reliable, bolt-on refresh for tired running gear.
Why this is a top pick
Rollers take a hiding in salt and sun. Trojan’s well‑matched rollers, shafts and brackets make it simple to replace like‑for‑like, restore alignment and improve hull support, all with parts widely stocked alongside other Trojan trailer parts in NZ.
Best for
Whether you run a simple centre‑keel setup or a multi‑roller cradle, you can mix and match components to suit hull shape and trailer frame.
- Keel rollers: Guided centre support for reliable drive‑on alignment.
- Wobble/side rollers: Spread load and reduce hull scuffing.
- Bow snubbers and V‑blocks: Secure the nose at the winch post.
What to check before buying
A quick measure-up avoids misfits and floppy rollers on launch day.
- Roller type and size: Keel, wobble, bow; confirm diameter and width.
- Shaft diameter/length: Match to existing brackets and roller bore.
- Bracket style/angle: Suits your cross‑member and hull deadrise.
- Material/compound: Choose hull‑friendly compounds for alloy vs fibreglass.
- Pins and fasteners: Stainless vs galvanised, correct thread and fixings.
- Clearance and count: Ensure full hull contact and no fouling at the winch post.
Where to buy in NZ
Action Outdoors stocks Trojan rollers, shafts and brackets online and in-store in Auckland. You’ll also find Trojan components at Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
Individual rollers and pins are the budget fix; bracket sets and multi‑roller hardware cost more. Marine finishes and larger diameters sit higher. Check live pricing with your chosen NZ retailer.
8. Trojan LED trailer lights and wiring looms
Trailer lighting cops spray, vibration and the odd knock at the ramp. Upgrading to Trojan LED lights and matching wiring looms cuts failure points and keeps you legal and visible, night or day. With lighting and electrical wiring in the Trojan range, you can spec a tidy, reliable setup that survives Kiwi conditions.
Why this is a top pick
- LED reliability: Low current draw, fast response and long service life.
- Matched looms: Plug-and-play style looms minimise joins and fault-finding.
- Built for trailers: Housings and gaskets designed for road spray and regular use.
Best for
- Boat trailers: Frequent dunkings and salt spray.
- Box and utility trailers: Constant vibration and rough surfaces.
- Caravans: High-visibility tail, stop and indicator performance on long hauls.
What to check before buying
- Voltage and plug: Confirm 12V system and your plug type/pin-out matches the tow vehicle.
- Function set: Tail/stop/indicator, number‑plate light, and optional reverse/fog as needed.
- Mounting: Lamp size, stud spacing, and bracket orientation for left/right sides.
- Cable run: Loom length, grommets and join points; plan routing away from pinch points.
- Compliance and visibility: Reflectors and lamp spacing appropriate for your trailer width.
Where to buy in NZ
Action Outdoors stocks Trojan LED trailer lights and wiring looms online and in-store in Auckland. You’ll also find Trojan components at Smart Marine, Repco, Boating & Outdoors, Trailer Parts NZ, Premium Parts, and via Trojan channels.
Typical price range
Single LEDs and reflectors are the entry spend; paired tail/indicator clusters and number‑plate lights sit mid-tier; full pre‑wired looms and complete boards cost more. Check current pricing with your chosen NZ retailer.
Final thoughts
From couplings and hubs to brakes, suspension, rollers and LEDs, Trojan parts cover the common NZ specs and make trailer maintenance predictable. Match the basics – 1 7/8" vs 50 mm, LM vs SL bearings, stud pattern, brake type and spring style – and you’ll tow straighter, stop shorter and launch easier. When in doubt, measure twice and buy once.
Ready to kit out your trailer? Compare specs, confirm ratings, and pick up the essentials locally. For fast, reliable supply and helpful advice, browse the Trojan range at Action Outdoors — online or in-store in Auckland — and get the right parts on the trailer before your next haul to the ramp or campsite.