VISOR & ROOF FAIRINGS

Visors & Roof Fairings For Peterbilt Trucks

Sun visors and roof fairings serve double duty on a Peterbilt -- the visor shades the windshield from direct sun and glare while the roof fairing deflects airflow up and over the trailer, reducing aerodynamic drag and fuel consumption on highway runs. Both are subject to cracking from UV exposure and impact damage from low-clearance contacts. We carry replacement visors and roof fairings for Peterbilt trucks in fiberglass and composite materials.

Frequently asked questions about visors & roof fairings

Do roof fairings actually improve fuel economy on a Peterbilt?

Yes, measurably. A properly matched roof fairing that directs airflow smoothly over the trailer gap reduces aerodynamic drag at highway speeds, where air resistance is the dominant fuel consumption factor. The fuel savings depend on the height mismatch between the tractor cab and the trailer -- a large gap produces more drag, and a well-fitted fairing addresses more of that gap. Studies from the Department of Energy and industry testing consistently show 2 to 10 percent fuel economy improvement from aerodynamic fairings on trucks operating at highway speeds, with the largest gains on long-haul routes.

Are Peterbilt roof fairings and visors model-specific?

Yes. Fairing and visor design is specific to the cab height, cab width, and roof profile of each Peterbilt model. A fairing designed for a 389 flat-top sleeper won't fit a 579 raised-roof configuration, and the aerodynamic profile needs to match the specific cab geometry to be effective. When replacing a fairing or visor, always specify the exact model, year, and cab/sleeper configuration to ensure the replacement fits correctly at all mounting points and delivers the expected aerodynamic performance.

How do I repair a cracked fiberglass visor or fairing on my Peterbilt?

Minor cracks in fiberglass fairings can be repaired using fiberglass repair kit material -- clean the crack, apply the repair compound, sand smooth, and prime and paint to match. For structural cracks that compromise the fairing's shape or mounting point integrity, a more thorough repair using fiberglass mat and resin is needed to restore strength before finishing. A fairing with extensive cracking, significant deformation, or broken mounting tabs is usually better replaced than repaired, since a poorly repaired fairing can fail at highway speed and create a road hazard.

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