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Overall Length (L):
From the front wall of the camper (nose that rests against the truck cab) to the rearmost point (include ladder, bumper, or storage boxes if they stick out). -
Overall Width (W):
Side-to-side at the widest point above the bed rails—usually across the wings. Include awning housings if they protrude. -
Overall Height (H):
From the bottom of the wings (lowest point that would be exposed when off the truck) to the highest roof projection (A/C, skylight, antenna, roof rack).-
If you store the camper on a stand/dollies, add that height only if the cover must reach below the wings.
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Add-ons that change fit:
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Rear ladder / cargo rack / bike rack
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Side or rear awning case
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Jack brackets (the jacks themselves are usually retracted and outside the cover; most covers are cut to go around or just outside them)
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Match to the mfr’s size chart using overall length first, then verify width/height. Covers are forgiving in height; length is what makes or breaks fit.
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If you’re between sizes, go up one size—easier to install, less stress on seams. You can take up slack with the included straps.
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For tall A/Cs or roof racks, many “truck camper” covers already assume ~100–110" height. If your height is unusual, choose a model with extra roof allowance.
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Wash off grit; pad sharp edges (ladder tips, jack brackets, awning corners) with foam or rags + tape.
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Remove/lock antennas down.
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Run the belly straps under the floor and around jacks per the cover’s routing—snug, not guitar-string tight. Re-snug after the first windy day.
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Use breathable, UV-resistant fabric for long-term storage; add a small vent gap at bottom if your site is humid.
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