3000Kg Tandem Axle Trailer Kit – Electric Drums & Rocker Roller

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3000kg DIY Tandem Axle Trailer Kit

Build your own tandem axle trailer with this comprehensive 3000kg DIY trailer kit from Trailer Spare Parts Australia.
Featuring Australian-made 45mm square solid axles, 10-inch electric drum brakes and 7-leaf rocker roller suspension, this package provides essential running gear, braking and towing components for a compatible trailer build.

Our Brisbane team machines the axles in-house to your selected length. Choose your axle configuration and drum stud pattern using the product options above.

How to measure trailer axle length from tip to tip

MADE TO ORDER

All kits are made to order. Our team machines the axles to your selected length, so kits are not available for same-day collection or dispatch. Please contact our team for current lead times.

What’s Included in Your 3000kg DIY Trailer Kit?

Coupling & Towing Components
  • 1 × 3500kg electric coupling, zinc finish
  • 1 × 4-hole coupling plate
  • 4 × Zinc-coated coupling bolts
  • 1 × Hand brake cable kit, including: 1 cable adjuster, 4 cable clamps and 8m galvanised hand brake cable
  • 2 × 13mm rated safety chains, 650mm long
  • 2 × Rated D-shackles

Australian-Made Axles & Suspension
  • 2 × Australian-made 45mm square solid axles, including castle nuts, flat washers and split pins
  • 1 × U-bolt kit, including 8 × 5-inch U-bolts with nuts, 4 axle pads and 4 fish plates
  • 1 × 7-leaf rocker roller suspension kit, including hangers and bolts

Electric Braking System
  • 4 × 10-inch electric brake drums, including bearings, seals and dust caps
  • Ford SL bearing configuration: LM68149/10 inner and LM12749/10 outer
  • 4 × 10-inch electric backing plates, assembled with brake shoes and magnets
  • 4 × Brake mounting plates
  • 16 × Backing plate nuts
  • 1 × Breakaway kit, including case, battery regulator, battery and switch

Additional Trailer Components
  • 1 × 8-inch heavy-duty swing-up jockey wheel
  • 1 × VIN plate

Kit Specifications

Kit rating3000kg
Axles2 × 45mm square solid steel
Suspension7-leaf rocker roller
Brakes10-inch electric drum brakes
BearingsFord SL
Approximate kit weight280kg

Important: Select the axle length and drum stud pattern to suit your trailer and wheels. Review the available product options before adding the kit to your cart.

This is a trailer parts kit, not a complete trailer. The trailer chassis, wheels, tyres and electrical wiring are not included. The finished trailer must meet applicable Australian requirements, and its allowable loading depends
on the complete design and component selection.

Need Help Choosing Your Kit?

Our Brisbane team can help you select compatible trailer components for your build.

Visit our Help Centre
for axle measurements, stud patterns and trailer building information.

Warranty & Returns

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).

Ask a Question

Axle Length Calculator

Holden / Ford / Parallel

  1. CW – Measure the width of your trailer body.
  2. BS – Measure the offset of the rims being used “with tyre fitted”.
  3. TC – 50mm Gap used on calculator as Standard.

 

Dexter

  1. CW – Measure the width of your trailer body.
  2. BS – Measure the offset of the rims being used “with tyre fitted”.
  3. TC – 40mm Gap used on calculator as Standard.

 

Determine the Rim Stud Pattern

Rim Stud Pattern

stud patterns on your trailer

IMPORTANT: The lines highlighted in yellow are the products we supply.

Wheel TypeStud DiameterStud NumberInches PCDMM PCDCentre to Centre of Adjacent StudsCentre to Centre of Adjacent Studs
Gemini7/16"4100.002 13/16"70.7
Mini7/16"44"101.602 13/16"71.84
Capri7/16"44 1/4"107.953"76.33
Cortina/Telstar7/16"44 1/4"107.953"76.33
Datsun 16007/16"44 1/2"114.303 3/16"80.82
Early Ford1/2"44 1/2"114.303 3/16"80.82
Toyota Corona7/16"44 1/2"114.303 3/16"80.82
Valiant to 717/16"54"101.602 3/9"59.72
Holden HT HG HK7/16"54 1/4"107.952 1/2"63.45
Ford1/2"54 1/2"114.302 5/8"67.18
Valiant 71 - 727/16"54 1/2"114.302 5/8"67.18
Commodore7/16"5120.002.776"70.53
Holden HQ HJ HX7/16"54 3/4"120.652 13/16"70.91
Ford F1001/2"55 1/2"139.703 1/4"82.11
Ford-Jeep1.2"55 1/2"139.703 1/4"82.11
Land Rover5/8"56 1/2"165.103 13/16"96.98
Land Cruiser 100 Series9/16"5150.0088.17
Land Cruiser 4WD1/2"65 1/2"139.702 3/4"69.85
Nissan Patrol1/2"65 1/2"139.702 3/4"69.85
Nissan Navara D401/2"6114.30

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