50mm Square 2t Hydraulic Disc Brake Overlay Axle

50mm Square 2t Hydraulic Disc Brake Overlay Axle


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50mm Square 2t Hydraulic Disc Brake Overlay Axle

50mm square 2t hydraulic disc brake overlay axle kits are used on boat trailers due to their anti-corrosive characteristics.

The 50mm square hydraulic axle assembly is our most popular drop axle seller. The overlay axle lowers the boat trailer by 55mm.

When installing the axle, the bleed values must point to the top of the cylinder; otherwise, the air inside the cylinder cannot escape when bleeding the brake lines.

When ordering your axle, tell us your chassis width and the distance between chassis rails? Axle pads can be welded into location, making it easy to install your new axle.

Overlay axles are used to lower trailers and caravans. Couplemate sells a complete range of spare trailer parts for axle kits.

Boat trailers use hydraulic disc brakes due to the anti-corrosive characteristics of galvanised disc braking systems.

  • All Couplemate marine disc braked axles are Australian made and galvanised.
  • Did you know Couplemte have a lifetime warranty against faulty craftsmanship?
  • However, this warranty does not cover consumables such as bearings and disc pads.

This galvanised overlay axle kit includes:

Purchase 2t American Stainless Rotor and Caliper setups here.

Calculating The Correct Axle Measurements

As a result of viewing the video above, calculate the face to face measurement.
  1. Measure the offset wheel. The wheel offset is the distance between the inside of the hub and the outside of the rubber.
  2. Add 50 mm to the offset. Alternatively, choose your own distance between the rubber and the chassis.
  3. Multiply by 2 for both sides. Add your chassis width to the above number.

Metric to Imperial Converter

Convert Imperial (inches) to metric (mm)

  • =

Still unsure of what measurements to take? Check out this handy guide below:

[P] - Check material specifications. What size and profile is the axle (for example, 45mm Square)
[T] - Overall axle length (tip to tip)
[F] - Hub face to hub face measurement
[A] - Chassis width
[C] - Tyre clearance
[B] - Back offset
[H] - Tyre to chassis
[G] - Axle pad centres

How To Measure An Axle

Identifying Bearing Combinations

You will also need to identify your bearing combination, which can be done by pulling off a hub and bearings and locating the number laser engraved onto the bearing. You will require both the inner and the outer bearing numbers.

Where to identify bearing number. Look for the laser engraved number on the bearing.

Additional information

Weight 180 kg
Dimensions 220 × 30 × 30 cm
Stud Pattern

2t Landcruiser 5 Stud | ElectroGal, 2t Landcruiser 6 Stud | ElectroGal

Face to Face Length

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