5 Most Replaced Trailer Parts & How to Maintain Them

Trailers are the backbone of the logistics industry. Whether used for local haulage or long-distance freight, they endure immense wear and tear due to heavy loads, variable road conditions, and constant use. As a result, certain trailer components are more prone to damage and need replacement more frequently than others.

Understanding which parts wear out fastest and how to maintain them can significantly reduce downtime, lower repair costs, and extend the life of your fleet.

At PR Group, we not only sell and service trailers but also offer a comprehensive range of spares and repair solutions. Here are the top five most commonly replaced trailer parts and how you can maintain them for longer-lasting performance.

1. Brake Systems

Why They Wear Out:

Trailer braking systems work hard, especially when carrying heavy loads. Over time, brake shoes, drums, discs, and air valves degrade due to friction, heat, and contaminants like dust and water. Neglecting brake maintenance can result in longer stopping distances or even brake failure.

Maintenance Tips:

• Regularly inspect brake pads, drums, and discs for wear and scoring.

• Check air lines for leaks and ensure valves and compressors are functioning optimally.

• Flush and replace brake fluid and air dryer cartridges according to the manufacturer's recommendations.

• Listen for warning signs, like unusual noises or pulling during braking.

At PR Group, we stock high-quality brake components compatible with most trailer makes and models, and our expert team can assist with repairs or upgrades.

2. Suspension Components

Why They Wear Out:

Suspension systems, including leaf springs, air bags, shock absorbers, and bushings, are critical for keeping the trailer stable and ensuring cargo safety. Continuous movement, potholes, and overloading can cause components to sag, break, or lose damping ability.

Maintenance Tips:

• Conduct monthly inspections for cracked, broken, or misaligned components.

• Keep bushings lubricated to prevent premature wear.

• Monitor the air pressure in suspension systems, particularly in airbag-equipped trailers.

• Replace damaged or corroded mounting brackets and bolts immediately.

At PR Group, our team is equipped to diagnose suspension issues and offer part replacements or full suspension servicing tailored to your trailer's usage.

3. Lights and Electrical Wiring

Why They Wear Out:

Trailers rely on a robust lighting system for safety and legal compliance. Tail lights, indicator lights, wiring harnesses, and connectors are vulnerable to corrosion, moisture ingress, and physical damage, especially in off-road or coastal environments.

Maintenance Tips:

• Test all external lights before and after every trip.

• Inspect wiring for frays, loose connections, or exposed copper.

• Use dielectric grease on electrical connections to reduce corrosion.

• Secure all wiring with proper grommets and cable ties to prevent chafing.

At PR Group, we offer a full range of trailer lighting components, from LED upgrades to waterproof connectors, ensuring your fleet remains road legal and visible.

4. Tyres and Wheel Bearings

Why They Wear Out:

Trailer tyres bear the brunt of load weight and long-haul friction. Similarly, wheel bearings facilitate smooth rotation and can fail due to a lack of lubrication or contamination. Underinflation, overloading, and poor road surfaces can cause rapid tyre and bearing degradation.

Maintenance Tips:

• Check tyre pressure weekly and adjust to the manufacturer's specs.

• Inspect tyres for uneven tread wear, cracks, bulges, or embedded objects.

• Repack wheel bearings with fresh grease at regular service intervals.

• Replace bearings that feel rough, noisy, or show signs of overheating.

At PR Group, we provide tyre replacement, balancing, and bearing servicing for all major trailer types.

5. Landing Gear and Jacks

Why They Wear Out:

Landing legs and jacks are exposed to the elements and used repeatedly for loading and offloading. Lack of lubrication, rust, and overextension can cause failure or collapse, posing safety risks to both cargo and operators.

Maintenance Tips:

• Grease moving parts regularly with heavy-duty lubricant.

• Inspect for bent legs, cracked welds, or stripped gears.

• Don’t exceed the recommended weight capacity of the landing gear.

• Operate slowly and avoid forcing the crank handle or gear mechanism.

At PR Group, our technicians can repair or replace landing gear systems efficiently, with OEM and aftermarket parts available to suit your budget and operational needs.

Final Thoughts

Regular maintenance is essential to keeping trailers roadworthy, compliant, and efficient. By understanding the most commonly replaced parts and following best practice maintenance routines, fleet operators can reduce costly breakdowns, ensure driver safety, and protect cargo integrity.

At PR Group, we don’t just sell trucks and trailers, we support businesses with genuine parts, expert advice, and professional servicing. Whether you need to source a new trailer, refurbish an existing one, or keep your fleet running at its best, we’re here to help.