Peterbilt Rear Fenders

Frequently Asked Questions About Peterbilt Rear Fenders

What materials are Peterbilt rear fenders made from, and which is best for my truck?

Most Peterbilt rear fenders come in three material options: stainless steel, aluminum, and fiberglass. Stainless steel fenders offer the best durability and corrosion resistance, making them ideal for harsh weather conditions and heavy-duty applications. Aluminum fenders provide a good balance of strength and weight savings, while fiberglass options are the most affordable but may require more frequent replacement. For trucks operating in salt-heavy regions or those hauling corrosive materials, we recommend investing in 304-grade stainless steel fenders.

How do I know if a rear fender will fit my specific Peterbilt model and year?

Peterbilt rear fenders are typically categorized by model series rather than specific years. Most fenders fit models 379, 389, 567, and 579, but mounting brackets and dimensions can vary. Check your truck's model number on the door jamb sticker and measure your existing fender's width and mounting hole spacing. Common sizes include 24-inch, 30-inch, and 36-inch widths. For trucks with custom suspensions or aftermarket modifications, you may need to verify clearance measurements before ordering.

Can I install Peterbilt rear fenders myself, or do I need professional help?

While rear fender installation is manageable for those with moderate mechanical skills, it typically requires 2-3 hours per side. You'll need basic tools including socket wrenches, drill bits for any new mounting holes, and ideally a helper to hold the fender in position. The most challenging aspect is usually removing old, corroded mounting hardware. If your truck has air ride suspension or complex bracket systems, professional installation may save time and ensure proper alignment. Always support the fender adequately during installation to prevent warping.

What finish options are available, and how do they hold up over time?

Rear fenders come in polished, brushed, painted, and powder-coated finishes. Polished stainless steel requires regular maintenance but provides the classic chrome-like appearance many drivers prefer. Brushed finishes hide minor scratches better and need less frequent polishing. Painted fenders should have automotive-grade primer and paint to resist chipping from road debris. Powder coating offers excellent durability but limits future customization options. Consider your maintenance schedule and aesthetic preferences when choosing a finish.

Will aftermarket rear fenders affect my truck's warranty or DOT compliance?

Quality aftermarket rear fenders that meet OEM specifications typically won't affect your truck's warranty, as they're considered appearance items rather than critical safety components. However, ensure any fender you purchase maintains proper tire coverage to meet DOT regulations - fenders must extend to at least the centerline of the rear axle and cover the full width of the tire. Some states have specific requirements for fender coverage, so verify your local regulations. Keep all receipts and documentation to show the fenders meet industry standards if questioned during inspections.