Help Centre
The Knowledge Centre is a comprehensive resource designed to assist you in addressing all your trailer-related questions, ranging from lightweight trailers with a Gross Trailer Mass (GTM) of 750kg up to larger trailers with a Gross Vehicle Mass (GVM) of 4.5 tonnes. Whether you’re a manufacturer, owner, or simply someone interested in trailer regulations, this hub of information is tailored to help you navigate the complexities of trailer construction, compliance, and maintenance. Stay informed on the latest regulations and standards affecting trailer construction and operation.
Can I still make a trailer at home?
Yes!
Previously, individuals and manufacturers could self-certify that a trailer complies with vehicle standards. This certification was included on the trailer’s identification plate—but it wasn’t necessary to notify the government. This has changed.
Individuals or businesses that manufacture less than 4 low ATM trailers within a 12 month period can apply for concessional approval into the ROVER database.
TO APPLY FOR ROVER APPROVAL:
- Register with Rover
- Sign a declaration that the trailer complies with vehicle standards
- Provide copies of invoices for parts & steel – this provides proof of quality and engineering numbers
- Provide photos of build stages to indicate quality
- Apply for VIN
Rover will provide a VIN after a minimum of 14 days. You are then free to register the trailer.
Read more about ROVER on the QLD Government website here.
What is the correct axle length for my trailer?
How do I identify my stud pattern?
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 |
How do I identify my bearings?
Linked below are most of the bearing combinations in the trailer industry.
How do I setup my trailer springs?
ROCKER ROLLER
TRI AXLE ROCKER ROLLER
OFF-ROAD REBOUND SUSPENSION
EYE TO EYE ( SHACKLE)
EYE TO SLIPPER 6mm
EYE TO SLIPPER 8mm
ROCKER SPRING
Brake Mounting Plate Location Guide
All measurements are according to parts supplied by Trailer Spare Parts Australia.
Building a trailer? Read the Australian Vehicle Standards Bulletin
Information for manufacturers and summarized construction requirements for trailers less than 4.5 tonnes aggregate.
Follow the link for more details.
