50mm Anti-Rattle Tow Ball Hitch Kit (50mm Drop)

50mm Tow Ball Hitch Kit for 3.5t ATM | Standard (50mm Drop)

Tow ball hitches are the key link between your vehicle and your trailer or caravan. There’s nothing more dangerous than a poor quality or loose tow bar tongue.

Having a strong and sturdy link is therefore important to maintain your safety, your family’s safety, and the safety of other Australians. If you’ve ever travelled along the Bruce Highway, the Great Ocean Road, or even the Oodnadatta Track, you know how rough our roads are.

Moreover, if you’ve ever driven with a loose tongue, you may know what tow bar rattle sounds like. (And know how quickly it becomes annoying).

Couplemate™ designed this tow ball hitch kit to provide the utmost in:

• Security: Cast receiver is fully ADR compliant and tested by Queensland Engineers.
• Safety: All components are made from high-quality materials and workmanship.
• Sanity: Custom-fit shims to target problem areas in your tow bar causing looseness.

What’s Included in the Kit?

• 1 x 50mm Chrome Tow Ball (pre-torqued)
• 1 x 3.5t 50mm Drop Hitch Receiver
• 2 x Stainless Steel Shims (0.5mm)
• 2 x Stainless Steel Shims (0.9mm)
• 1 x Class IV Retaining Pin and R-Clip

The 100mm drop/rise hitch is available here.

What Makes the Tow Ball Hitch Strong? Why is it Better than Others?

Each kit includes a genuine Couplemate™ Receiver to suit standard Australian 3.5t tow balls (22mm shank).

The main benefit of Couplemate™ Receivers stem from it’s design and material composition: completely solid cast from high-quality grey iron.

In our experience, welded or hollow receivers can distort and deform over time due to the towing environment. This process can be expedited when inverted, as some tongues on the market are not designed to be used upside-down. Therefore, the cast receiver design is superior as it is completely solid and manufactured in one piece.

The Couplemate™ Receiver included your 50mm Tow Ball Hitch Kit is the CM521, which has been:

• Developed, designed, and tested by Queensland Engineers.
• Manufactured and quality-checked by Australian workers.
• Widely accepted as the best hitch for standard 50mm vehicle tow bars.

What is Hitch Rattle? How Do You Stop It?

We’ve included a set our CM256 Stainless Shims to create this Anti-Rattle Tow Ball Hitch Kit.

Rattle occurs when there is too much “free space” between components. For example, if you have a loose tow bar tongue, the rattling comes from the steel of your tow bar vibrating against your hitch receiver. The noise is often louder when there’s no load on your tow ball (i.e. no trailer attached).

Shims are supplied “pre-cut” so that you can optimise the fitment for your needs.

You can effectively target any problem areas inside your tow bar (including the top, bottom, or sides) to effectively minimise rattle.

See our YouTube video for a quick guide (great for visual learners):

We also have a handy written “How-To” guide here: Install Your Shims in 4 Steps.