Nissan D21 Truck Bed & Tonneau Covers

The Nissan D21, also known as the Hardbody, has earned legendary status as one of the most dependable pickups of the late ‘80s and early ‘90s. Today, the D21 lives on as restoration projects, weekend cruisers, and reliable workhorses. Regardless of how you use your D21, a RealTruck tonneau cover is the perfect way to enhance—not detract—from its iconic boxy styling and legendary functionality.​

D21 owners prioritize simplicity and utility as much as aesthetics. Whether you prefer a soft roll-up, tri-fold, or hard folding design, RealTruck’s lineup offers quick, tool-free access to your truck’s bed, hassle-free installation, and slick, ultra-low-profile styling that looks right at home on a classic pickup.​

Of course, protecting your investment is just as crucial as preserving its style. Older truck beds, like the D21’s, are more susceptible to rust and corrosion, making weather-resistance a top concern. RealTruck’s Hardbody tonneau covers feature durable, marine-grade vinyl construction, weatherproof perimeter seals, and specially engineered drainage systems to keep water out and keep your truck’s bed protected.

Outfitting a classic truck like the Nissan D21 requires more attention to detail than simply picking a universal-fit cover. At RealTruck, we take into account the unique needs of older pickups—from maintaining their original styling cues to accommodating decades of wear and tear. Our tonneau covers are designed to deliver modern performance and functionality without compromising the Hardbody’s effortlessly cool and timeless styling.​

Unlike lesser-quality, generic tonneau covers, RealTruck’s custom-fit truck bed covers—like the TruXedo TruXport—are engineered exclusively for the D21’s unique dimensions. That means better sealing, easier installation, and a more refined appearance. Whether you’re restoring your truck to showroom condition, upgrading utility, or cleaning up an old work truck for a first-time driver, our tonneau covers are the ultimate addition.​

Key features that set RealTruck’s D21 tonneau covers apart include:​

• Automatic Tension Control Systems: Built-in tension control systems promote a snug, always-taut appearance without any manual adjustments.

• Low-Profile Inside-the-Rail Mounting: Select tonneau covers mount inside the bed rails, offering an ultra-low-profile appearance that preserves the Hardbody’s factory body lines.

• Precision Vintage Fitment: Dedicated options for both 6-ft. and 7-ft. bed configurations ensure flawless, factory-style fits—no misaligned corners or unattractive overhangs.

FAQs About Our Nissan D21 Truck Bed Covers

Q: Will RealTruck tonneau covers fit both the Nissan D21 single cab and king cab?

A: Yes. Bed length on the D21 is independent of cab configuration, meaning Single Cab and King Cab models can share the same tonneau cover if their bed lengths match. Most D21 trucks feature a 6-foot bed, but it’s always best to measure from the bulkhead to the tailgate to confirm proper fitment before ordering.​

Q: Does the D21 truck bed cover work with my over-the-rail drop-in bed liner?

A: In most cases, yes—but some modification may be required. Over-the-rail liners can interfere with clamp placement, so you may need to trim small sections of the liner to allow for a secure, metal-on-metal connection.​

Q: Are RealTruck tonneau covers weatherproof?

A: While no tonneau cover is completely waterproof, RealTruck’s designs come close. With heavy-duty EPDM rubber seals, snug fitment, and durable, weather-resistant construction, our covers significantly reduce moisture intrusion.