Tame the Beast with the new look DO45 Plus.

All the style and features that have made the DO35 an industry favourite are now available in a 4.5T DO45 capable model.

Kit Includes:

- DO45 Plus (With Handbrake)
- Tow Pin 1 1/4" Shaft
- Tow Pin Cover
- Universal C-Spanner
- Fitment Bolts
- User Guide

For Safety On Road and Capability Off It

High articulation in all direction ensures the trailer always follows you in challenging terrains. High articulation also provides safety in the event of an accident on the road.

Simple To Use Locking Mechanism

The DO45Plus features a simple positive locking mechanism. Once locked the Checklock cap is then fitted to keep the dirt out and to show that the coupling is securely attached.

On Road Use

The inherit safety that comes with the articulation and ADR compliant locking mechanism of the DO45Plus means when the worst happens you couldn’t be in safer hands. If a roll over occurs when travelling the DO35 is less likely to disconnect or roll the vehicle with the caravan/trailer than many other couplings currently available. (Effectiveness of coupling in this scenario will be affected by towing peripherals such as WDH systems).

Let’s not kid ourselves, you may start a trip with the best on intentions to keep to the flat top… But road conditions can change drastically and quickly! With the state of some “sealed” roads in Australia you may as well be on the dirt! The DO45Plus gives you the reassurance that your hitch can handle any road put in front of it.

Off-Road Use

When off-road articulation is king! Lets not kid ourselves most people aren't taking their 4.5T caravan down the same tight tracks as those with camper trailers, but for those who are brave... The articulation of the DO45Plus allows you to explore more remote locations safely with its rotational articulation both horizontally and vertically.

But it doesn’t end there… when we talk off-road in Australia, we are largely talking tough corrugations, this is where the build quality of the DO45Plus shines. Your coupling takes a beating on outback road, you will quickly find that only the toughest survive… the middle of nowhere isn’t the place to find this out! The DO45Plus has high quality acetal bushes and is fully greaseable to reduce wear in the toughest of terrains.


The Cruisemaster DO35 V3Plus and DO45Plus Range of couplings have been designed with safety as a priority! The positive locking 2 stage ADR compliant locking mechanism gives you the reassurance that the vehicle and caravan and truly secured. The patented “Checklock” Gen.2 Cap also doubles as both dust protection and a fool proof safety check, the cap will only fit onto the coupling when the lock is activated… if the cap doesn’t fit your not ready to tow!

Safety doesn’t end with the locking mechanism! Special consideration was given to the build materials, it was increasingly important to have the added strength to manage the additional forces added by a Weight Distribution System while keeping the unit slimline and light weight.

This was achieved by a combination of a forged steel Yoke and Rear Nut for strength where it matters and a cast Housing to reduce weight were not safety critical.

We believe seeing is knowing; where others may be moving towards systems that enclose the safety critical locking components away from view we believe it is important to keep this components accessible and visible so you rest assured that a secure connection is achieved before travel.

Low Profile

The DO45Plus was designed with clearance in mind! Don’t let a grab handle or handbrake stop you from accessing your rear doors. The DO45Plus has been tested on many of Australia’s favorite touring vehicles to ensure adequate door clearance.


The Cruisemaster DO45Plus uses a wider 4 bolt mounting pattern than the DO35 to allow for the more substantial build, meaning you may need to modify your mounting plate if upgrading from a different coupling.

Available with or without handbrake. This listing is for the with hand brake version.

Download the User Guide here.

Weight Distribution Systems

It is important to note when selecting a WDH or tow tongue for use with the DO45Plus that you select a unit suitable for use with the 1 1/4" shaft of the DO45Plus Pin.

Key Features:

- 4,500Kg Rated
- D-Value & V-Value ADR Compliant
-Patented “Checklock” Gen.2 Dust Cap & Bumper for an easy, secure seal
- Reflective Reversing Strip
- Rear support webbing allows for mounting upside down on the underside of the drawbar
- Plus all the design and function recognised from the DO35 V3Plus
- Patented “Checklock” Gen.2 Dust Cap & Bumper for an easy, secure seal
- Improved Bumper molding gives the from reflector strip improved staying power
- Rear support webbing allows for mounting upside down on the underside of the drawbar
- D-Value & V-Value ADR Compliant
- 2 Stage ADR compliant locking mechanism
- Low profile Bumper & Cap for impressive clearance
- High articulation for improved handling off-road and on unmaintained roads
- Available with or without handbrake
- Suitable for use with Weight Distribution System’s (Where Applicable)
- Forged Yoke and Rear Nut for added strength
- Exceeds ADR 62/01 and 62/02 strength requirements
- One piece light weight Cast Housing
- Wider bolt pattern
- 1 1/4” shaft
- Improved towing safety
- Combination of zn-ni and e-coat for superior corrosion protection
- Greaseable Bushes for easy maintenance and noise free towing
- No tow ball height restrictions
- R.A.T Run Tested and Proven

The DO45Plus’s Zn-Ni with E-Coat provides superior corrosion protection however, it may fade with extended exposure to UV. This does not affect the operation of the DO45Plus. To best maintain the finish of the product, we recommend covering the DO35 coupling when not in use if stored outside and exposed to direct UV.

DO45 Version 1 & DO45Plus accessories and fittings are not interchangable.  

Hitchmaster is a product of Cruisemaster and has been superseded by the Cruisemaster brand. All Hitchmaster products are compatible with the Cruisemaster spare parts and accessories.

Brand Cruisemaster
Shipping Weight 7.0000kg