Find Rear Fender Styles for Kenworth W900B & W900L
Different fender styles solve different problems.
- Full Fenders: Full fenders give the most coverage front to back. They help control road spray, protect your trailer, suspension, and airlines, and keep the rear of your W900 cleaner in rain and snow.
- Half Fenders: Half fenders sit closer to the tires and leave more open space. They're a solid choice if you deal with low-hanging trailers, dock plates, or tight yards where clearance is tight.
- Long-Drop Wrap Fenders: Long-drop wrap fenders come down lower and wrap around the tire. They offer strong splash control and help keep mist off tankers, hazmat trailers, and polished stainless. They also give your W900B or W900L a sharp, show-style look.
- Quarter Fenders: Mount between the axles to protect the rear drive axle. They're compact, simple, and better than running bare if you just want basic defense from rocks and debris.
- Single Axle Fenders: Single axle fenders cover one axle per side. Great if you're running a single axle setup or replacing fenders one axle at a time.
Find the Right Material
Material affects weight, durability, and how much time you spend cleaning and polishing.
- Polyethylene (Poly): Poly fenders are lightweight and budget friendly. They won't rust and handle daily heavy duty use with very little upkeep.
- Aluminum / stainless Steel: stainless steel is very durable and corrosion resistant. Aluminum is lighter, which helps when you're watching every pound of payload. Both give a polished, high-end look and need occasional polishing.
- Fiberglass: Fiberglass is lightweight and paintable. You can match your cab, frame, or stripe layout for a true custom Kenworth W900 look.
Find the right fender by thinking about how you drive and what your needs are.
- Abuse Level: Run rough oil field, logging, or construction roads? Go with super duty or extra thick-gauge fenders and stout brackets. Roll mostly highway? Rolled or long-drop styles keep things clean and smooth.
- Splash Control: Long-drop wrap fenders are best if you want to cut road spray to a minimum, especially with tankers or hazmat loads.
- Weight vs. Appearance: Need every pound of payload? Choose lighter poly or rolled aluminum. Want your W900B or W900L to turn heads? Pick polished stainless or painted fiberglass.
- Maintenance: Poly fenders are the easiest. Wash and go. Metal fenders need polish to stay mirror-bright. Fiberglass may need touch-up if it chips.
Buying new rear fenders means you also need solid mounting gear. You can find brackets, mounting plates, and hardware built for Kenworth W900B/W900L rear fender setups so your fenders stay straight and rattle-free.
You can also pair your new rear fenders with
Kenworth W900B/W900L mudflaps, add a
Kenworth W900B/W900L cab light or
Kenworth W900B/W900L cab, sleeper & cowl panels to add more style.
Choose from heavy duty aftermarket brands like Minimizer, Hogebuilt, Merritt, Fibertech, TPHD, and more so you can match your budget, route, and the look you want for your Kenworth semi truck.
Frequently Asked Questions About Kenworth W900B/W900L Rear Fenders
What's the difference between W900B and W900L rear fenders, and will they fit my truck?
W900B and W900L rear fenders have different mounting configurations due to the frame rail spacing. W900B models (short hood) typically have narrower frame rails, while W900L models (long hood) have wider spacing. Before ordering, measure your frame rail width or check your OEM to confirm your exact model. Most fenders manufactured after 2007 will fit both models with proper brackets, but pre-2007 trucks may require model-specific fenders.
Are these fenders made from fiberglass or metal, and which material holds up better?
We offer both fiberglass and aluminum rear fenders. Fiberglass fenders are lighter (about 40-50% less weight), more affordable, and easier to repair if damaged. Aluminum fenders are more durable against impacts, won't crack, and maintain their shape better in extreme temperatures. For drivers in harsh winter climates or those frequently loading heavy equipment, aluminum is often the better long-term investment despite the higher upfront cost.
Can I install these fenders myself, or do I need a professional shop?
Installation typically takes 3-4 hours per side for someone with basic mechanical skills. You'll need standard hand tools, a drill with metal bits, and ideally a helper to position the fenders. The main challenges are aligning the mounting brackets correctly and drilling new holes if your bolt pattern doesn't match. We include detailed instructions, but if you're not comfortable drilling into your frame or don't have a lift, professional installation runs $200-400 and ensures proper fitment.
Do these fenders come with mounting hardware and brackets?
Most of our rear fenders include basic mounting brackets and hardware for standard installations. However, if you're replacing aftermarket fenders or have modifications like custom exhaust stacks or wider tires, you may need additional brackets or longer bolts. We recommend checking your current setup before ordering. Universal bracket kits are available separately for $45-75 if needed.
What finish options are available, and how do they hold up to road salt and weather?
Our fenders come in polished aluminum, brushed aluminum, painted steel, and gel-coated fiberglass options. Polished aluminum requires regular maintenance (monthly polishing) but provides the classic chrome-like appearance. Brushed aluminum hides scratches better and needs less maintenance. Painted options should be professionally prepped and painted for best results. All aluminum options naturally resist corrosion, while painted and fiberglass options need annual inspection and touch-ups in high-salt areas.
Kenworth W900B/W900L Fender Mounting & Acc.
Kenworth W900B/W900L Full Fenders
Kenworth W900B/W900L Full Radius Fenders
Kenworth W900B/W900L Half Fenders
Kenworth W900B/W900L Quarter Fenders
