
Plastic trailer mudguards are an essential component of trailers with wheels outside of their body. They are typically made from strong and pliable plastic, which can be bolted directly onto the trailer body or mounted with mudguard brackets. When fitting plastic trailer mudguards, it is important to ensure compatibility with the vehicle's make and model, as different vehicles have unique mounting requirements and sizes. Plastic mudguards are suitable for light-duty use, while metal or rubber mudguards are more appropriate for demanding conditions. To enhance protection, larger mudguards can be installed, but they may necessitate additional mounting hardware. Single mudguards are commonly used for single-axle vehicles, providing coverage for one wheel, while tandem or tri-axle mudguards cater to multiple sets of wheels. It is worth noting that standing on plastic mudguards should be avoided as they are not designed to bear significant weight.
| Characteristics | Values |
|---|---|
| Material | Plastic |
| Durability | Strong and durable |
| Compatibility | Suits 8 to 14-inch wheels |
| Mounting Options | Bolted directly onto the trailer body or mounted with brackets |
| Maintenance | Regular cleaning and inspection for wear and damage |
| Protection | Offers protection from mud and debris |
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What You'll Learn

Choose the right mudguard material, size, and style for your vehicle
Choosing the right mudguard material, size, and style for your vehicle is essential for adequate protection from the elements. Here are some factors to consider when selecting the perfect mudguard for your needs:
Material
The material of the mudguard is crucial for its durability and flexibility. It should be made of a material that is flexible enough to bend instead of breaking in the event of a crash. At the same time, it should be stiff enough to prevent wobbling while riding. Recycled plastic is a common material used for mudguards due to its simplicity and ease of manufacturing.
Size
To determine the appropriate size, you must consider the diameter of your wheels and the width of your tyres. The mudguard should be slightly wider than your tyre to ensure full coverage without making contact with the tyre. For example, if you have a 32mm wide tyre, a mudguard that adds 3mm is ideal, so look for a 35mm mudguard.
Style
The style of the mudguard depends on the type of vehicle and your specific needs. Full-length mudguards, such as the SKS Chromoplastics, offer maximum coverage and protection, making them ideal for urban bikes. These mudguards wrap around a large portion of the wheel, preventing road spray from reaching your clothes. If your bike doesn't have eyelets or adequate space, clip-on mudguards like the RaceBlade Pro XL guards are a good alternative. While they offer slightly less protection, they are easy to attach and detach, making them convenient for different weather conditions.
Additionally, consider the type of terrain you frequent and the level of protection you require. Minimal protection mudguards are small, light, and discreet, perfect for those concerned with aesthetics. On the other hand, high protection mudguards are longer and wider, providing better coverage for challenging terrain with thick and sticky mud.
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Ensure the mudguard is compatible with your vehicle's make and model
When fitting plastic trailer mudguards, it is important to ensure that the mudguard is compatible with your vehicle's make and model. This is because mudguards are designed to fit specific car models, and using the wrong one can affect the installation process and the overall appearance of your vehicle.
Firstly, consider the material of the mudguard. Mudguards are typically made from plastic, rubber, or metal, each with its own advantages and disadvantages. Plastic mudguards, for example, are lightweight and resistant to rust and corrosion, but they can be brittle and crack easily. Rubber mudguards, on the other hand, are more durable and less likely to crack, but they can be heavy and may absorb water, leading to potential rust issues. The material you choose should also match the material of your existing mudguard or mudflap. This ensures that the new mudguard fits well and gives your car a uniform look.
Secondly, consider the size and fit of the mudguard. Mudguards are designed to protect specific areas of your vehicle, so it is important to choose one that is the correct size and shape for your car's make and model. Check that the mudguard has the correct holes for installation, as these may not be the same for every mudguard.
Additionally, pay attention to the wheel size compatibility. Mudguards are often designed to fit specific wheel sizes, so ensure that the product you choose is suitable for your vehicle's wheel size.
By considering these factors, you can ensure that the plastic trailer mudguard you choose is compatible with your vehicle's make and model, making the installation process smoother and ensuring optimal protection for your car.
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Prepare the trailer body for mounting
To prepare the trailer body for mounting plastic mudguards, start by ensuring that your trailer's wheels are positioned outside of its body. This configuration is typical for trailers that require mudguards. Next, determine the appropriate size of mudguard for your trailer by considering the size of your tyres. The mudguard should be sized correctly to provide sufficient coverage for your tyres. Remember that larger mudguards might require additional mounting hardware.
After selecting the right size, consider the material of the mudguards. Plastic mudguards are ideal for light-duty use, while metal or rubber mudguards are more suitable for demanding conditions or off-road applications. If you opt for metal mudguards, be aware that they require proper maintenance to prevent rust. On the other hand, rubber mudguards offer flexibility and can withstand significant impacts, making them a good choice for trailers navigating rough terrain. They also help reduce noise by absorbing vibrations.
When preparing the trailer body for mounting, it's essential to understand the different mounting options available. Plastic mudguards can be easily bolted directly onto the trailer's body or mounted using mudguard brackets. Brackets are often used to strengthen the installation or for specific trailer types, such as boat or flatbed trailers. If you choose to bolt the mudguards directly, ensure the trailer body has a flat surface to facilitate secure and direct screw-on installation.
Additionally, consider the overall width of your trailer, including any fittings such as mudguards. The maximum width allowed for a trailer is typically 2.3 metres. By mounting the wheels underneath the trailer body, some trailers negate the need for mudguards, allowing for a wider trailer body. However, keep in mind that stepping on plastic mudguards during loading or unloading is a common cause of breakage, so ensure the trailer body is designed to prevent this.
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Attach the mudguard with bolts or brackets
Plastic trailer mudguards are typically attached to the trailer body using bolts or brackets. This is a straightforward process, but it's important to ensure that the mudguard is securely fixed and appropriately sized for your trailer.
When attaching the mudguard with bolts, you will need to drill holes in the trailer body and the mudguard itself. The number and placement of the holes will depend on the specific mudguard and trailer, so it is important to carefully measure and mark the drill points before drilling. It is also crucial to use the correct type and size of bolts, as well as washers and nuts, to ensure a secure fit. Tighten the bolts securely, but be careful not to over-tighten, as this can strip the threads or damage the plastic.
If you prefer to use brackets, there are a few different options available. Some mudguards come with built-in brackets that can be bolted or screwed directly into the trailer body. These brackets provide additional support and strength to the mudguard. Separate mounting brackets can also be purchased if your mudguard does not have built-in ones. When using brackets, ensure that they are securely attached to both the trailer and the mudguard, following the manufacturer's instructions.
It is important to note that the placement of the mudguard is crucial. The mudguard should be positioned correctly in relation to the wheel to ensure proper coverage and protection. The specific placement will depend on the type of trailer and wheel configuration, so refer to the manufacturer's guidelines or seek advice if you are unsure. Additionally, it is worth mentioning that while symmetry is aesthetically pleasing, it is not a requirement for the mudguards to match as long as they are both securely fixed and appropriately sized.
Finally, remember that maintenance and regular inspections are important to ensure the longevity of your plastic trailer mudguards. Check for any signs of wear, damage, or loose bolts or brackets, and address them promptly. By following these instructions and performing regular maintenance, you can ensure that your plastic trailer mudguards are properly attached and provide effective protection for your trailer.
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Regularly check for wear and damage
Regular and proper maintenance of your plastic trailer mudguards is essential to ensure optimal performance and compliance with regulations. Here are some detailed instructions to help you regularly check for wear and damage:
Firstly, it is important to understand the typical wear and damage that plastic trailer mudguards can experience. Plastic mudguards are susceptible to cracking and fading when exposed to sunlight over time. They may also be more prone to cracking under impact. Therefore, it is crucial to regularly inspect your plastic mudguards for any signs of cracking, fading, or other damage.
Secondly, the height of the mudguard from the ground should be checked regularly. In Queensland, the Department of Transport and Main Roads enforces that the bottom edge of the mudguard should be no more than 230mm from the ground when the trailer is unloaded. Ensure that your mudguards comply with the regulations in your specific location.
Additionally, check for excessive wear or damage on the mudguard's surface. Mudguards play a crucial role in protecting the underside of your trailer and towing vehicle from stones, mud, and other debris. Over time, the surface of the mudguard may show signs of abrasion or erosion due to the constant impact of debris. Regularly inspect the surface for any significant wear, and consider treating any affected areas to prevent further deterioration.
Furthermore, ensure that your plastic trailer mudguards remain securely attached to the trailer. Check for any loose bolts or screws that may need tightening. If the mudguard is welded, inspect the welds for any cracks or weaknesses that could compromise the integrity of the attachment.
Finally, keep an eye out for any signs of corrosion or rust on the trailer near the mudguard. Plastic mudguards are typically rust-resistant, but the metal components they are attached to may not be. Treat any corrosion or rust promptly to prevent further damage and ensure the continued functionality of your mudguards.
By following these maintenance steps and regularly checking for wear and damage, you can help ensure the safety, legality, and longevity of your plastic trailer mudguards.
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Frequently asked questions
Plastic trailer mudguards are protective covers for the wheels of trailers. They are necessary to ensure maximum coverage and cleanliness.
The size of the mudguard should correspond to the size of your tires. A larger mudguard offers better protection but may require additional mounting hardware.
Plastic is a good option for light-duty use, while metal or rubber might be better for more demanding conditions. Metal mudguards are durable and protective but can be prone to rust if not maintained properly. Rubber mudguards are flexible and can withstand significant impacts, making them ideal for off-road vehicles and trailers that navigate rough terrain.
Plastic trailer mudguards can be bolted directly onto a trailer's body or mounted with mudguard brackets.










































