TRAILER FENDERS &
FENDER COMPONENTS
IN PHOENIX, ARIZONA

Trailer fenders help shield the trailer, its cargo, and surrounding traffic from water, mud, rocks, and road debris thrown by the tires. They also provide important tire coverage and contribute to the trailer’s overall appearance. A properly selected and securely mounted fender must fit the tire size, axle arrangement, trailer frame, suspension travel, and available clearance.

Deer Valley Trailer stocks a wide selection of single-axle fenders, tandem-axle fenders, round fenders, Jeep-style fenders, smooth steel fenders, diamond-plate steel fenders, smooth aluminum fenders, diamond-plate aluminum fenders, tow dolly fenders, fender lights, mounting brackets, and related hardware.

Whether you are replacing a damaged trailer fender, restoring an older trailer, fabricating a custom trailer, or changing the tire-and-wheel configuration, our knowledgeable parts specialists can help identify a fender that fits the application.

WHAT DOES A TRAILER FENDER DO?

A trailer fender covers the upper portion of the tire and helps control the spray and debris produced by the rotating wheel. This protection can reduce the amount of water, gravel, mud, and other material thrown toward the trailer body, cargo, tow vehicle, and nearby motorists.

Fenders may also provide mounting locations for required side marker or clearance lights. Their exact function and construction depend on the trailer, but they should never be treated as load-bearing steps unless they were specifically designed, supported, and rated for that purpose.

TRAILER FENDERS WE CARRY

Deer Valley Trailer carries fenders for numerous light-duty, medium-duty, marine, utility, commercial, and specialty trailer applications. Our selection includes individual single-axle fenders, longer tandem-axle fenders, driver-side and passenger-side tow dolly fenders, and multiple material and finish options.

Our regularly stocked and sourced fenders include popular sizes and designs for many 12-inch, 13-inch, 14-inch, 15-inch, and 16-inch trailer wheel applications. Availability varies by material, style, width, length, height, gauge, and intended trailer use.

SINGLE-AXLE TRAILER FENDERS

Single-axle fenders are designed to cover one tire on each side of the trailer. They are commonly found on utility trailers, enclosed cargo trailers, landscape trailers, boat trailers, motorcycle trailers, tow dollies, and other light- to medium-duty trailers.

Deer Valley Trailer stocks several common single-axle configurations, including approximately 9-inch-wide by 32-inch-long round fenders, 10-inch-wide Jeep-style fenders, and larger single-wheel designs for wider or taller tire applications. Selecting by wheel diameter is an important starting point, but overall length, width, height, mounting space, and tire clearance must also be confirmed.

TANDEM-AXLE TRAILER FENDERS

Tandem-axle fenders cover two neighboring tires and are commonly used on enclosed cargo trailers, car haulers, landscape trailers, equipment trailers, dump trailers, and commercial utility trailers.

Deer Valley Trailer carries and sources long round and teardrop-style tandem fenders in steel and aluminum configurations. Our inventory includes popular 9-inch-wide tandem fenders approximately 66 inches long and 72 inches long, along with other sizes for different wheel diameters and axle spacing.

Because tandem fenders span a greater distance than single-axle fenders, adequate support is especially important. Depending on the trailer and fender construction, center supports, end brackets, frame mounts, or fabricated reinforcement may be needed to prevent excessive vibration and metal fatigue.

ROUND TRAILER FENDERS

Round trailer fenders follow the curved shape of the tire and are among the most common styles used throughout the trailer industry. They provide a clean, traditional appearance and are available for both single- and tandem-axle trailers.

Round fenders are offered in several widths, lengths, heights, materials, and metal thicknesses. They can be installed using compatible mounting brackets or welded to properly designed supports, depending on the fender and trailer construction. Common bolt-on brackets are designed around specific fender widths and wheel sizes, so the bracket must be matched to the fender rather than selected independently.

JEEP-STYLE TRAILER FENDERS

Jeep-style fenders use a squared profile with angled front and rear sections. This design is commonly chosen for utility trailers, off-road trailers, custom builds, and applications where a more rugged or angular appearance is preferred.

Deer Valley Trailer stocks Jeep-style fenders in smooth steel, smooth aluminum, and aluminum diamond plate. Our selection includes popular single-axle sizes approximately 10 inches wide and between 33 and 36 inches long, depending on the intended tire and trailer configuration.

TOW DOLLY FENDERS

Tow dolly fenders are often shaped specifically for the tow dolly frame and may differ between the driver and passenger sides. Some assemblies include integrated lighting and wiring, while others are supplied as the fender only.

Deer Valley Trailer carries and sources replacement tow dolly fenders, including driver-side and passenger-side configurations for common Stehl-Tow applications. Because the mounting pattern, shape, lighting position, and side orientation can vary, the original fender or detailed measurements are often needed for accurate identification.

STEEL VS. ALUMINUM TRAILER FENDERS

Steel and aluminum fenders are both widely used on trailers, but each material has different characteristics. The appropriate choice depends on the trailer construction, operating environment, desired appearance, mounting method, and maintenance expectations.

STEEL TRAILER FENDERS

Steel fenders provide strong, durable tire coverage and are commonly used on utility trailers, enclosed trailers, equipment trailers, landscape trailers, and custom fabrication projects. They can generally be welded or mounted with properly designed brackets.

Bare or unfinished steel should be prepared and protected with an appropriate coating to help reduce corrosion. Cold-rolled steel fenders are commonly offered in 16-gauge and other thicknesses, with smooth and diamond-plate surfaces available for different applications.

ALUMINUM TRAILER FENDERS

Aluminum trailer fenders offer corrosion resistance and lower weight while providing a clean appearance. They are frequently used on aluminum utility trailers, boat trailers, enclosed trailers, tow dollies, custom trailers, and decorative upgrades.

Deer Valley Trailer stocks smooth aluminum and diamond-plate aluminum fenders in round and Jeep-style profiles. Aluminum fenders must be mounted using methods and hardware compatible with the trailer and fender material. Care should also be taken when aluminum contacts dissimilar metals in wet environments because the combination can contribute to galvanic corrosion.

SMOOTH VS. DIAMOND-PLATE FENDERS

Smooth fenders provide a simple surface that can blend with many trailer designs. Smooth steel can be prepared and painted to match the trailer, while smooth aluminum offers a clean, corrosion-resistant appearance.

Diamond-plate fenders have a raised tread pattern that creates a more rugged visual style and can help conceal minor cosmetic wear. However, a diamond-plate surface does not automatically mean the fender is designed to be stepped on. Structural support and manufacturer-rated capacity determine whether a fender can safely function as a step.

CAN A TRAILER FENDER BE USED AS A STEP?

A trailer fender should not be used as a step unless it was specifically designed and properly supported for that purpose. Many smooth and diamond-plate fenders are made from relatively thin sheet material intended to control spray and debris—not support a person’s weight.

Stepping on an unsupported fender can bend the metal, break mounting brackets, damage welds, reduce tire clearance, or cause the fender to contact the tire. A separate reinforced step or properly engineered fender-step assembly should be used when climbing access is needed.

HOW TO IDENTIFY THE CORRECT TRAILER FENDER

Trailer fenders are not selected by appearance alone. Two fenders may look similar while having different widths, heights, lengths, wheel clearances, mounting profiles, or material thicknesses.

The correct replacement should provide sufficient coverage without contacting the tire as the suspension moves. It must also fit the trailer frame, body, steps, lights, and mounting supports.

START WITH THE TRAILER WHEEL SIZE

Trailer fenders are commonly classified according to the wheel diameter they are designed to cover. The wheel diameter can usually be identified from the final number in the tire size. For example, the “15” in ST225/75R15 identifies a tire designed for a 15-inch wheel.

Wheel diameter is only a starting point. Tires installed on the same wheel diameter can have different overall widths and heights, so the complete tire size and actual available space should also be considered.

MEASURE THE FENDER WIDTH

Measure across the fender from the trailer side to the outer edge. The replacement must be wide enough to cover the tire without interfering with the trailer body, frame, wheel, or suspension.

Do not assume the original fender width is correct if the trailer’s wheels, tire sizes, hubs, or axle configuration have been changed.

MEASURE THE FENDER LENGTH

Measure from the front edge of the fender to the rear edge. For a single-axle fender, this determines how much of the individual tire is covered. For a tandem fender, the length must accommodate both tires, the space between them, and the trailer’s axle spacing.

Matching the overall length is especially important when replacing a fender that must align with existing frame supports, body panels, steps, or light brackets.

MEASURE THE FENDER HEIGHT

Measure vertically from the bottom edge to the highest point of the fender. Adequate height is necessary to clear the tire while maintaining appropriate suspension travel.

A fender that fits while the trailer is unloaded may contact the tire when the suspension compresses under cargo or while traveling over bumps.

CHECK TIRE AND SUSPENSION CLEARANCE

The fender must allow enough space for normal tire movement, suspension compression, axle articulation, and tire growth during operation. Clearance requirements can vary according to the suspension design, axle placement, tire size, trailer load, and intended use.

A trailer used on rough roads or construction sites may require more movement clearance than a trailer operated mainly on smooth paved roads. Existing contact marks, damaged tire tread, or polished areas beneath a fender may indicate inadequate clearance or a suspension problem.

CHECK THE MOUNTING POINTS

Compare the replacement fender with the trailer’s existing brackets, supports, frame rails, body panels, and bolt-hole locations. Some replacements require new holes, different brackets, welding, or fabricated supports.

Mounting-slot spacing can sometimes be more important than overall fender length, especially with molded fenders or fenders designed for specific bracket systems.

TRAILER FENDER MOUNTING OPTIONS

Trailer fenders may be bolted or welded to the trailer, depending on the fender material, trailer construction, and intended mounting system. Regardless of the method, the fender must be securely supported and installed without creating interference with the tire or suspension.

BOLT-ON FENDER INSTALLATION

Bolt-on fenders are attached using compatible brackets and mounting hardware. This method can simplify future replacement and may be preferred for aluminum fenders or trailers where welding is not appropriate.

The brackets must match the fender width, wheel size, frame configuration, and material. Common fender bracket systems may use two supports for a single fender, while long tandem fenders can require additional center support.

WELD-ON FENDER INSTALLATION

Many steel fenders can be welded to fabricated supports or directly integrated into the trailer structure. Welding should be completed by someone familiar with trailer fabrication and the materials being joined.

A fender should not rely on thin sheet metal alone for support. Poor weld placement, insufficient reinforcement, excessive heat, or rigid mounting without adequate support can lead to distortion or cracking.

FENDER BRACKETS & CENTER SUPPORTS

Fender brackets connect the fender to the trailer frame and help control movement caused by road vibration. Single-axle fenders commonly use a front and rear bracket, while tandem fenders may require end supports and a center bracket.

Deer Valley Trailer carries and sources fender brackets, supports, mounting hardware, and fabrication materials for many common trailer configurations.

TRAILER FENDER LIGHTS & CLEARANCE LIGHTS

Depending on the trailer’s width, length, design, and lighting configuration, a fender may provide a mounting location for side marker or clearance lights. These lights improve nighttime visibility and help other motorists recognize the trailer’s position and dimensions.

Deer Valley Trailer stocks driver-side and passenger-side fender lights, red-and-amber LED assemblies, incandescent fender lights, submersible marine-style lights, mounting brackets, and related wiring components.

DRIVER-SIDE & PASSENGER-SIDE FENDER LIGHTS

Combination fender lights may use an amber lens facing forward and a red lens facing rearward. Because the orientation changes from one side of the trailer to the other, some assemblies are manufactured specifically for the driver or passenger side.

When replacing a fender light, verify the trailer side, lens orientation, mounting style, wiring connection, overall dimensions, and whether the light grounds through a dedicated wire or through its mounting bracket.

LED & INCANDESCENT FENDER LIGHTS

LED fender lights offer low electrical demand, quick response, and resistance to vibration. Sealed or submersible designs are especially useful on boat trailers and trailers frequently exposed to water.

Incandescent fender lights remain in use on many older trailers and may be the most direct replacement when restoring an existing lighting configuration. The replacement should match the mounting footprint, wiring, lens orientation, and electrical function of the original assembly.

SIGNS A TRAILER FENDER MAY NEED REPLACEMENT

Trailer fenders are exposed to road debris, vibration, weather, loading impacts, tire failures, and accidental contact. Damage should be addressed before the fender becomes loose or interferes with the rotating tire.

COMMON WARNING SIGNS

Bent or Crushed Fender
Cracked Metal
Broken Welds
Loose Mounting Brackets
Missing or Damaged Fasteners
Severe Rust or Corrosion
Sharp or Torn Edges
Tire Contact Marks
Insufficient Tire Clearance
Fender Vibration While Towing
Damaged Fender Lights or Wiring
Misalignment After an Impact
Fatigue Cracks Around Mounting Points

REPLACING A FENDER AFTER A TIRE FAILURE

A tire blowout can cause substantial damage to the fender, trailer sidewall, wiring, lights, brackets, and nearby cargo area. Before installing a new fender, the complete area should be inspected for bent supports, torn sheet metal, damaged wiring, misaligned brackets, suspension damage, and changes in tire clearance.

The replacement fender should not be mounted to weakened or distorted supports. Repairing the underlying structure first helps ensure the new fender remains secure and properly positioned.

CUSTOM & HARD-TO-FIND TRAILER FENDERS

Older, modified, imported, marine, tow dolly, and custom-built trailers may use fenders that are no longer available as direct replacements. In these situations, a replacement may need to be selected by overall dimensions and adapted to the trailer using new brackets or professional fabrication.

Deer Valley Trailer can help compare available steel and aluminum fenders, determine which measurements are most important, and identify whether a stocked fender, special-order part, or fabricated solution is the most appropriate direction.

INFORMATION TO BRING WHEN IDENTIFYING A TRAILER FENDER

Providing complete measurements and clear photographs gives our parts specialists the best opportunity to identify a compatible replacement.

HELPFUL FENDER INFORMATION

Single-Axle or Tandem-Axle Configuration
Tire Size
Wheel Diameter
Fender Width
Fender Length
Fender Height
Distance Between Tandem Tires
Axle Spacing
Steel or Aluminum Construction
Smooth or Diamond-Plate Surface
Round or Jeep-Style Profile
Bolt-On or Weld-On Mounting
Existing Bracket Measurements
Driver-Side or Passenger-Side Orientation
Fender Light Style and Dimensions
Photographs of the Fender and Mounting Area
Original Fender When Available

DEER VALLEY TRAILER EXPERT TIP

One of the most common mistakes made when replacing a trailer fender is matching only the tire or wheel diameter. A fender may be advertised for a particular wheel size and still be too narrow, too short, too tall, or incompatible with the trailer’s mounting supports.

Measure the complete fender and inspect the available tire clearance before selecting a replacement. For tandem trailers, also measure the axle spacing and distance between the tires. Bringing the original fender or detailed photographs with a tape measure visible can make identification much easier.

TRAILER FENDERS & FENDER COMPONENTS IN PHOENIX, ARIZONA