Homepage Couplemate Trailer Parts newsroom

Simple Inspections by Caravanners Save Serious Consequences

Announcement posted by Couplemate Trailer Parts 12 Aug 2021

Caravan Neglect can be Super Expensive

Caravan wheel nut indicators help identify loose wheel nuts caused by rough dirt roads.

Broken wheel studs on caravan and campers occur regularly on Australia’s open highways.

Occasionally, caravanners will spot the loose nuts and tighten, using a wheel brace, immediately thereby averting catastrophe.

Detached wheels cause damage to the caravan wheel well. After exiting the wheel well, sadly, damage can turn to carnage and occasionally, death.


How can a simple broken stud become an expensive exercise?

Couplemate supplies country dealers all over Australia, so we are aware of the issues.

Here is a small list of what needs to be done.

(a) Tow truck to bring your van into town for a hub replacement.

(b) A few days accommodation because the van is in the workshop.

(c) A few days storage whilst the mechanic overnights parts into town.

(d) The mechanics bill to enable repairs.


The best solution to loose wheel nuts and to provide a safety device is to install cheap indicators to provide an obvious answer to the problem.

Install a wheel nut indicator on each wheel for $1 each. 

The pointer tuned to the 5 o’clock position and nestled close to the hub boss.

Road vibration still causes wheel nuts to loosen and move in an anti-clockwise direction away from the hub boss.

However, owners performing routine morning checks in preparation for the day’s adventures can identify indicators that have moved during the previous day’s adventures.

Identification and tightening of loose wheel nuts just become simple.


  • 7/16″ fits Holden wheel nuts – 19mm is the measurement across the flats of the nut.
  • 1/2″ fits all Ford and some other stud patterns. 21mm is the measurement across the flats of the nut.
  • 5/8″ suits 5 Stud Landcruiser.  23mm is the measurement across the flats of the nut.
  • 41mm fits truck wheel nuts.

Wheel nut indicators are no longer restricted to trucks and heavy vehicles.

wheel nut indicator

What causes wheel nuts to loosen?

Vibration is a simple answer.

Checking U-bolts is another good article about road vibration worth reading.

Caravan Wheel Nut Indicators

Source: https://couplemate.com.au/caravan-wheel-nut-indicators/