Kenworth T800 Fender Extensions

Frequently Asked Questions About Kenworth T800 Fender Extensions

What are fender extensions and what do they do?

Fender extensions attach to the outer edge of the fender to provide additional coverage over the tires. They help block road spray, mud, and debris from being thrown outward toward the cab, other vehicles, and the trailer, especially in wet or muddy conditions.

Will these fender extensions fit my Kenworth T800 without modification?

Fender extensions listed for the Kenworth T800 are designed to match the OEM fender profile for that model, but fit can vary slightly depending on the fender style your truck came with (steel, poly, or half-fender configurations) and the model year. Check the product listing for specific fender compatibility, and compare mounting hole patterns to your existing fender before ordering.

What materials are these fender extensions made from, and which is best for my needs?

Fender extensions are commonly available in materials like poly, rubber, or diamond-plate aluminum. Poly and rubber options tend to be lighter and more flexible, which can help them hold up better against minor impacts, while diamond-plate aluminum offers a more polished, heavy-duty appearance. Choose based on your priorities for durability, weight, and finish.

How are fender extensions installed?

Most fender extensions bolt directly onto the existing fender using pre-drilled holes or simple mounting brackets, and typically do not require cutting or permanent modification. Basic hand tools are usually sufficient for installation. If your extension does not come pre-drilled, you will need to mark and drill mounting holes to match your fender.

Do fender extensions affect legal compliance or mud flap spacing requirements?

Fender extensions can affect the required clearance and coverage rules for mud flaps and tire spray in some states, since they change how much of the tire is covered. It is a good idea to check your state's specific regulations on fender and mud flap coverage before and after installation to make sure your setup stays compliant.