To identify a Dee Zee mud flap, compare its overall dimensions, material and upper edge before relying on the truck name. The Brite-Tread aluminum styles have either a straight rectangle or radius notch, while the DZ17939 uses black plastic and has a separate application. Each comes as a pair, but the mounting patterns are not interchangeable.
Identify the shape and material
DZ17939 uses a black plastic design with an 18 × 11-inch listed size. Verify the exact vehicle application.
DZ1800 has a 16 × 12-inch aluminum rectangular outline without the radius notch of the 1808 series.
DZ1808 and DZ1808TB are 19 × 11-inch aluminum guards; the finish differs between silver and textured black.
Compare the Dee Zee part numbers
Measurements are the listed overall flap dimensions; they do not establish where the holes will fall on a particular vehicle.
| MPN | Overall size | Material and finish | Outline | Fit check |
|---|---|---|---|---|
| DZ17939 | 18 × 11 in | Black plastic | Contoured rectangle | Check specified F-250 application; catalog shorthand is ambiguous |
| DZ1800 | 16 × 12 in | Aluminum; coated finish | Straight rectangular outline | Universal-style; measure wheel opening and clearance |
| DZ1808 | 19 × 11 in | Silver aluminum | Radius notch at top | Multi-fit; verify wheel-opening shape |
| DZ1808TB | 19 × 11 in | Textured black-coated aluminum | Radius notch at top | Multi-fit; verify wheel-opening shape |
What to inspect before replacement
Measure the old flap and original attachment area. Check the wheel arch, tire clearance, existing holes and whether a radius notch is needed. Examine old fasteners and the body panel for corrosion or damage before fitting a replacement.
Dee Zee's 19-inch radius-notch splashguards may require different mounting locations from a straight 16-inch rectangle. Check tire clearance and body-panel geometry, especially on vehicles with factory fender flares or running boards.
No model here is documented as including logos, insert panels or anti-sail stiffeners. Check the individual listing for package contents and mounting hardware.
Find the corresponding Dee Zee listing
Choose the matching part number to inspect its listing and availability.
Dee Zee DZ17939
A black plastic pair with contoured edges. Vehicle-specific fitment requires confirmation; drilling is listed.
Check listing and availability
Dee Zee DZ1800
A pair of rectangular Brite-Tread aluminum guards, smaller than the 19-inch notched versions.
Check listing and availability
Dee Zee DZ1808
Silver-finish aluminum pair with a radius notch and 19-inch overall length.
Check listing and availability
Dee Zee DZ1808TB
The black textured variant in the 19 × 11-inch notched style, not the straight DZ1800 outline.
Check listing and availabilityOther truck protection references
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