Mounting Plastic Trailer Fenders: A Step-By-Step Guide

how to mount plastic trailer fenders

Installing trailer fenders is a simple process that can be done in a few different ways. One common method is to use mounting brackets, such as the ones provided with the Single Axle Trailer Fenders or purchased separately for other models. You can also mount the fenders directly to the trailer frame by drilling through the fender skirt and using large washers to secure it. Another option is to use L-shaped, bolt-on brackets, which require drilling holes in the fender for the trailer studs to go through. When installing plastic trailer fenders, it's important to ensure the correct clearance from the tire treads and to consider whether you want to add lights or other modifications.

Characteristics Values
Mounting Brackets CE26098G-2, CE26065PGA, CE26061G, PF1135-BKT-2
Trailer Fender Models Single Axle Trailer Fender, Fulton Single Axle Trailer Fender, Tandem Axle Trailer Fenders, CE Smith Single Axle Trailer Fenders
Wheel Sizes 12", 13"-15", 14"
Fender Materials Plastic, Steel
Installation Method Drilling and mounting to trailer frame, using existing mounting brackets, or creating custom brackets
Clearance Minimum 3" between the top of the tire and underside of the fender when fully loaded; 4" recommended for tandem axle trailers
Additional Hardware Large washers, L-shaped bolt-on brackets, galvanized steel brackets

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Using mounting brackets

When mounting plastic trailer fenders using mounting brackets, there are a few key steps to follow. Firstly, it is important to ensure that the bracket is positioned correctly against the fender. This involves aligning the bracket with the fender and the trailer frame. Once the bracket is in the correct position, you can proceed to mark the holes for drilling. It is recommended to test the fit of the bracket on the trailer frame before drilling, to ensure accurate placement of the holes.

After marking the holes, you can begin drilling. Starting with a pilot hole is advisable, as it allows for a smoother transition to a larger bit. Once the holes are drilled, the brackets can be mounted onto the fender. It is important to ensure that the brackets are securely attached to the fender.

When attaching the fender to the trailer, it is recommended to use the centre bolts and old hardware or regular bolts that fit through the frame. For added security, a lock washer or a lock nut can be used on the other side. This ensures that the bracket and fender are firmly attached to the trailer frame.

It is worth noting that some trailers may require the use of mounting brackets due to the inability to mount the fender directly to the trailer frame. In such cases, determining the appropriate hardware to work with the specific trailer, brackets, and fender is crucial. Galvanized steel, L-shaped, bolt-on brackets are a common choice for plastic, single-axle trailer fenders. These brackets are designed to resist corrosion and provide a secure fit.

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Drilling through the fender skirt

It is important to note that drilling through the fender skirt may not be suitable for all types of plastic trailer fenders. Some fenders, especially those with steps, may require the use of mounting brackets instead of drilling. Mounting brackets provide stability and support for the fender, allowing the steps to be utilized safely. Therefore, it is essential to consider the design of the fender and whether drilling through the fender skirt will impact its functionality.

When opting to drill through the fender skirt, selecting the appropriate drill bits and hardware is crucial. The drill bit should be compatible with the material of the fender skirt, ensuring a clean and precise hole. Additionally, using washers and bolts that are specifically designed for plastic surfaces can enhance the security of the installation. It is always advisable to refer to the manufacturer's instructions or seek expert advice to ensure the correct hardware is selected.

The process of drilling through the fender skirt typically involves measuring and marking the precise locations for the drill holes. It is important to ensure that the holes align perfectly with the corresponding holes or studs on the trailer frame. Drilling pilot holes can be a helpful preliminary step to ensure accurate positioning before expanding the holes to the final size. This methodical approach helps to avoid mistakes and ensures a secure fit for the fender.

In some cases, additional reinforcement may be necessary when drilling through the fender skirt. This can be achieved by using metal plates or brackets that distribute the load across a larger area, reducing the stress on the plastic fender. It is important to consider the weight-bearing capacity of the fender and select reinforcement methods or hardware that can withstand the expected load. By taking these factors into account, you can ensure a durable and safe installation of the plastic trailer fenders.

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Attaching to the trailer frame

Attaching the fender to the trailer frame is a crucial step in the installation process. Here is a detailed guide on how to do this:

First, determine if your fenders come with mounting brackets or if you need to purchase them separately. Some fenders, such as the Single Axle Trailer Fender, come with mounting brackets that stabilize the fender. In this case, you can follow the manufacturer's instructions for installation without needing to drill into the backing.

However, if your fenders do not include mounting brackets, you will need to purchase compatible brackets or create your own. For example, the Fulton Plastic Trailer Fenders require you to use your own mounting brackets or hardware. You may be able to modify existing brackets or use specific brackets like PF1135-BKT-2.

When using mounting brackets, you will need to secure one side of the bracket to the trailer and the other side to the fender. This can be done in various ways, but ensure that the diameter is 3/8" to fit the brackets.

If you are unable to use mounting brackets, you can attach the fender directly to the trailer frame through the fender skirt on the back of the fender. It is recommended to use large washers when drilling through the fender skirt to attach it to the trailer frame.

Additionally, consider the type of fender you have. For instance, if your plastic fenders have steps, you may need to drill holes in the fender to accommodate the studs on the trailer, and the steps will cover where the brackets attach.

By following these steps and choosing the appropriate method for your specific fenders, you can successfully attach plastic trailer fenders to the trailer frame.

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Using L-shaped, bolt-on brackets

Mounting plastic trailer fenders using L-shaped, bolt-on brackets is a straightforward process, but it requires careful planning and the right hardware. Here is a step-by-step guide:

Planning and Preparation:

Before beginning the installation, gather all the necessary hardware, including the L-shaped brackets, bolts, washers, and any other required components. Ensure that the brackets are specifically designed for mounting plastic trailer fenders, such as the Galvanized Steel, L-Shaped, Bolt-On Brackets (PF775-BKT-2). Check that the brackets are compatible with your specific trailer and fender setup.

Drilling Holes:

If your trailer fender doesn't already have holes, you will need to drill them. Carefully mark and drill holes in the plastic fender that align with the studs on your trailer. This will ensure that the studs can pass through the fender and secure the brackets in place.

Attaching the Brackets:

Once the holes are drilled, position the L-shaped brackets in the desired location on the trailer frame. Secure the brackets to the trailer frame using appropriate bolts and washers. Ensure that the brackets are firmly attached and able to bear the weight of the fender.

Mounting the Fender:

With the brackets in place, align the holes in the plastic fender with the studs on the trailer. Carefully fit the fender over the studs, ensuring it sits securely on the brackets. You may need to adjust the bracket positioning slightly to achieve the perfect fit.

Finalizing the Installation:

After the fender is mounted onto the brackets, secure it in place by fastening any additional hardware, such as nuts or bolts, onto the studs. Ensure that all fasteners are tightened securely. Check that the fender is firmly attached to the trailer and perform any necessary tests to ensure its stability.

By following these steps and using L-shaped, bolt-on brackets, you can securely mount plastic trailer fenders to your trailer frame. This method provides a sturdy and reliable solution for installing replacement fenders or customizing your trailer setup.

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Matching fenders to wheel size

When mounting plastic trailer fenders, it is important to match the fenders to the correct wheel size. This ensures proper coverage and clearance, preventing the tires from rubbing against the fenders during travel.

The basic rule of thumb is to maintain a minimum clearance of 3 to 5 inches between the top of the tire and the underside of the fender. When the trailer is fully loaded, this clearance allows for trailer suspension movement without causing friction between the tire and the fender.

To achieve this, it is recommended that the fender should be at least 8mm wider than the tire, with a range of 10-12mm being ideal. For example, if you have 32mm or 1 1/4" (for 27") tires, 45mm fenders are appropriate. If you have 42mm tires, 50 or 52mm fenders are a better fit. This clearance is crucial to prevent debris, such as pebbles and sticks, from getting lodged between the fender and the tire.

Additionally, it is worth noting that some tires may be smaller than their advertised size, so it is advisable to measure the inflated tire to ensure an accurate fit. When determining the fender width, remember that it is measured from the outside, not the inside.

For tires wider than 42mm, it is recommended to stick with a 60mm-wide fender to avoid interference with the "road" drivetrain. This setup may result in a slight gap between the tire and the fender, but it is a necessary compromise to accommodate the ultra-wide tires.

Frequently asked questions

You can use a couple of L-brackets, such as PF775-BKT-2, to mount a replacement fender. You will need to drill holes in the fender so the studs on the trailer can go through. Then attach the brackets.

You can mount the fenders directly to the trailer frame through the fender skirt on the back of the fender. It is recommended to use large washers if you drill through the fender skirt and attach the fender directly to the trailer frame.

Trailer fenders come in different types, including Single Axle Trailer Fenders and Tandem Axle Trailer Fenders. They are also categorized based on their wheel size, such as 12", 13", 14", or 15" wheels.

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