Build your heavy-duty tandem axle trailer with our 4500kg DIY trailer kit from Trailer Spare Parts Australia. This comprehensive parts package features Australian-made 50mm square Dexter turn axles, 12-inch electric drum brakes and 4500kg-rated 9-leaf rocker roller suspension.
Our Brisbane team manufactures the axles in-house to your selected length. The kit includes a 4500kg electric coupling to suit a 70mm tow ball, electric braking components, a breakaway system and essential trailer running gear.
MADE TO ORDER
All kits are made to order. We manufacture the axles in-house to your selected length. Kits are not available for same-day collection or dispatch. Please contact our team for current lead times.
| Kit rating | 4500kg |
| Axles | 2 x Australian-made 50mm square Dexter turn axles |
| Suspension | 4500kg-rated 9-leaf rocker roller |
| Brakes | 12-inch electric drum brakes |
| Coupling | 4500kg electric coupling |
| Tow ball | 70mm |
| Safety chains | 2 x 10mm Grade T (80) alloy, 650mm, 3200kg rated each |
| D-shackles | 2 x 2T WLL rated |
| Hammer lock connectors | 4 x 5.3T WLL rated |
| Stabiliser leg | 3.2-tonne swing-up |
| Approximate kit weight | 290kg |
Important Before Ordering
Confirm your axle length, drum stud pattern, wheel compatibility and towing setup. This kit uses a 70mm tow ball coupling, not a standard 50mm tow ball.
Please note: This is a trailer parts kit, not a complete trailer. Chassis, wheels, tyres and electrical wiring are not included. The completed trailer must meet applicable Australian requirements. Individual component ratings do not determine the certified rating of the finished trailer or safety-chain assembly.
Our Brisbane team can help you select compatible axle lengths, stud patterns, electric brakes and towing components for your trailer build.
Visit our Help Centre
for axle measurements, stud patterns and trailer building information.
Any products thought to be faulty can be returned to Trailer Spare Parts Australia for investigation at the customer’s expense. We reserve the right to determine whether the item/s are faulty or have been incorrectly used or mistreated. We are happy to accept any unwanted stock within 14 days of delivery or collection. Returned items must be in “as new” condition for resale. Any specially ordered axles (IRS, Overlay and Drop Axles) are not returnable. Trailer Spare Parts Australia charges a re-stocking fee of 15% to any authorized returns, plus freight if the goods returned are not subject to warranty.
If the goods are subject to warranty, Trailer Spare Parts Australia will replace the goods and pay all freight inbound and outbound under our terms and conditions. All products sold by Trailer Spare Parts Australia carry a 12 months warranty under our terms and conditions.
Recommendations for these terms can be found on each product page, except for disposable parts (bearings, brake pads, etc).
IMPORTANT: The lines highlighted in yellow are the products we supply.
| Wheel Type | Stud Diameter | Stud Number | Inches PCD | MM PCD | Centre to Centre of Adjacent Studs | Centre to Centre of Adjacent Studs |
|---|---|---|---|---|---|---|
| Gemini | 7/16" | 4 | 100.00 | 2 13/16" | 70.7 | |
| Mini | 7/16" | 4 | 4" | 101.60 | 2 13/16" | 71.84 |
| Capri | 7/16" | 4 | 4 1/4" | 107.95 | 3" | 76.33 |
| Cortina/Telstar | 7/16" | 4 | 4 1/4" | 107.95 | 3" | 76.33 |
| Datsun 1600 | 7/16" | 4 | 4 1/2" | 114.30 | 3 3/16" | 80.82 |
| Early Ford | 1/2" | 4 | 4 1/2" | 114.30 | 3 3/16" | 80.82 |
| Toyota Corona | 7/16" | 4 | 4 1/2" | 114.30 | 3 3/16" | 80.82 |
| Valiant to 71 | 7/16" | 5 | 4" | 101.60 | 2 3/9" | 59.72 |
| Holden HT HG HK | 7/16" | 5 | 4 1/4" | 107.95 | 2 1/2" | 63.45 |
| Ford | 1/2" | 5 | 4 1/2" | 114.30 | 2 5/8" | 67.18 |
| Valiant 71 - 72 | 7/16" | 5 | 4 1/2" | 114.30 | 2 5/8" | 67.18 |
| Commodore | 7/16" | 5 | 120.00 | 2.776" | 70.53 | |
| Holden HQ HJ HX | 7/16" | 5 | 4 3/4" | 120.65 | 2 13/16" | 70.91 |
| Ford F100 | 1/2" | 5 | 5 1/2" | 139.70 | 3 1/4" | 82.11 |
| Ford-Jeep | 1.2" | 5 | 5 1/2" | 139.70 | 3 1/4" | 82.11 |
| Land Rover | 5/8" | 5 | 6 1/2" | 165.10 | 3 13/16" | 96.98 |
| Land Cruiser 100 Series | 9/16" | 5 | 150.00 | 88.17 | ||
| Land Cruiser 4WD | 1/2" | 6 | 5 1/2" | 139.70 | 2 3/4" | 69.85 |
| Nissan Patrol | 1/2" | 6 | 5 1/2" | 139.70 | 2 3/4" | 69.85 |
| Nissan Navara D40 | 1/2" | 6 | 114.30 |