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?
Most trailer wheel bearings can be identified by the bearing number stamped into the metal cone, or by carefully measuring the bearing if the number can no longer be read.
Find the bearing numbers
Remove the hub and locate the numbers stamped on the inner and outer bearing cones. Common examples include LM67048, L68149 and LM11949.
Identify inner & outer
Trailer hubs normally use an inner (larger) bearing and an outer (smaller) bearing. Record both numbers so the correct bearing combination can be identified.
Measure if required
If the bearing numbers cannot be read, carefully measure the outside diameter, inside diameter and width. A vernier caliper will provide the most useful measurement.
These are some of the most common bearing combinations used in Australian trailers. Use the bearing numbers and dimensions below to help identify your setup.
| Type | Position | Dimensions | Cup | Cone | Seal |
|---|---|---|---|---|---|
| LM / Holden | Inner – Big | 59.1 × 31.75 × 15.875 mm | LM67010 | LM67048 | 28560 59mm OD × 37.5mm ID |
| Outer – Little | 45.237 × 19.05 × 15.494 mm | LM11910 | LM11949 | ||
| SL / Ford | Inner – Big | 59.131 × 34.988 × 15.875 mm | L68110 | L68149 | 28600 59mm OD × 40mm ID |
| Outer – Little | 45.237 × 21.986 × 15.494 mm | LM12710 | LM12749 | ||
| Dexter 2T – D60 | Inner – Big | 82.931 × 44.450 × 23.812 mm | 25520 | 25580 | 33940 85.5mm OD × 48.5mm ID |
| Outer – Little | 62 × 31.75 × 18.161 mm | 15123 | 15245 | ||
| Parallel / ESS | Inner – Big | 59.131 × 34.988 × 15.875 mm | L68110 | L68149 | 28600 59mm OD × 40mm ID |
| Outer – Little | 59.131 × 34.988 × 15.875 mm | L68110 | L68149 |
Need another bearing combination?
Our complete identification chart also includes Composite, Dexter, USA/Dexter, TB500, AL-KO and Melbourne Turn bearing combinations.
If you’re unsure which bearings you need, contact Trailer Spare Parts Australia with the numbers stamped on your bearings or the measurements you have taken. Our team can help identify the correct replacement.
Please note: This information is provided for identification purposes. Trailer Spare Parts Australia may not stock every bearing, hub or axle combination shown in the full bearing chart. Please contact us if you are unsure.
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.
