1991 Nissan Trucks D21 Tires

The 1991 Nissan Trucks D21 does not use one universal tire size across the entire model range. Primary fitments include 195/75R14, 215/75R14, 235/75R15, 31X10.50R15, and 215/75R15, all in radial construction. The exact size depends on the truck’s specific sub-model and, in some cases, drivetrain configuration.

That means the first step is identifying the truck as Base, DRW, SE 4x2, SE 4x4, or XE and then confirming whether it has 14-inch or 15-inch wheels. Many D21 pickups have been modified over time, so checking the actual wheels on the truck matters just as much as knowing the original fitment group.

A 1991 Nissan Trucks D21 can use either a 14-inch or 15-inch rim, depending on the exact sub-model and tire size. The 195/75R14 and 215/75R14 fitments are paired with 14-inch rims, while 235/75R15, 31X10.50R15, and 215/75R15 are 15-inch applications.

Wheel diameter is the first fitment check because a 14-inch tire cannot be mounted on a 15-inch rim, and the reverse is equally true. Once diameter is confirmed, compare wheel width against the tire you are considering, especially on trucks with replacement wheels or a more aggressive 4x4-style setup.

No, 1991 Nissan Trucks D21 sub-models do not all use the same tire size. The DRW and Base models use 195/75R14, the SE 4x2 uses 215/75R14, the XE uses 215/75R15, and the SE 4x4 is associated with 235/75R15 or 31X10.50R15.

That variation makes sub-model identification important before comparing products. It also helps explain why one D21 may appear to have a much different stance than another. A truck wearing different wheels than its original configuration should be checked carefully so the selected tire matches both the sub-model and the current wheel setup.

Start with the correct size for the exact 1991 Nissan Trucks D21 sub-model, then confirm the wheel diameter and width before comparing tire styles. Since every primary fitment here is radial, the next decisions usually involve whether the truck is being kept stock in appearance, given a custom whitewall look, or set up for more utility-oriented use.

After the fitment basics are settled, compare sidewall treatment, tire series, and load figures that suit the truck’s intended use. A 4x4-oriented D21 and a street-driven Base truck may need very different tire character even when both use radial construction, so the best choice is the one that matches configuration, wheel specs, and visual goals.

Sidewall choices for the 1991 Nissan Trucks D21 vary by tire size and include wide whitewall, narrow whitewall, raised white letter, and black sidewall offerings. The whitewall choices appear most often in the metric radial sizes, while the truck-oriented BFGoodrich all-terrain options use raised white letter or black sidewall presentations depending on size.

That variety lets a D21 owner steer the truck toward a cleaner stock-style road look, a custom cruiser appearance, or a more rugged pickup presentation. Sidewall style should be selected only after the correct size is established, since not every sidewall treatment is available across every 14-inch and 15-inch fitment.

Tires for the 1991 Nissan Trucks D21 are available from Coker Classic, American Classic, BFGoodrich, Maxxis, Tornel, and Travelstar. Brand coverage changes by size, so some fitments offer a broad mix of classic-style radial choices, while others are narrower and more specialized, such as the single all-terrain option in 31X10.50R15.

Brand selection is most useful after narrowing the truck to its correct tire size. Once that is done, compare the series each brand offers, the sidewall style, and the wheel-width compatibility. That approach is more useful than choosing by brand name alone, especially on a platform like the D21 with several distinct fitment paths.

A period-style 1991 Nissan Trucks D21 tire choice starts with the truck’s correct original-size category, not with a styling cue alone. Since the D21 uses radial fitments throughout this range, a restoration-oriented approach usually means selecting the proper 14-inch or 15-inch radial size first, then choosing a sidewall treatment that matches the truck’s intended look.

Whitewall options can create a stronger custom or vintage-inspired presentation, while black sidewall or raised white letter choices can keep the truck looking more workmanlike or sport-truck oriented. If exact originality matters, compare your truck against vehicle-specific reference material before settling on a brand or sidewall style.

On the 1991 Nissan Trucks D21, construction is simpler than on many older collector vehicles because the primary fitments are already radial. That means appearance is influenced less by bias-ply-versus-radial shape differences and more by size selection, wheel diameter, sidewall treatment, and whether the truck uses a standard metric size or a larger flotation-style truck tire.

A restored street-driven D21 on 195/75R14, 215/75R14, or 215/75R15 can look very different depending on whether it wears narrow or wide whitewalls. A 4x4 using 31X10.50R15 presents a much more truck-focused stance, so construction remains radial either way, but the visual effect changes significantly with the fitment chosen.

Yes, modifications can affect tire fitment on a 1991 Nissan Trucks D21. Aftermarket wheels, suspension changes, ride-height changes, and body or fender alterations can all influence whether the intended tire size has proper mounting compatibility and adequate clearance, especially when moving between 14-inch and 15-inch setups or using a larger 31X10.50R15 tire.

A D21 that no longer has its original wheel package should be measured before any replacement tire is chosen. Check actual wheel diameter and width, then confirm steering clearance and room at the fenders. That step is especially important on SE 4x4 trucks, where stance and clearance can change noticeably with wheel and tire revisions.

Before driving a 1991 Nissan Trucks D21 on new tires, inspect the wheels for damage, verify the lug hardware is correct, and make sure the tires match the truck’s required size and rim diameter. It is also wise to look over suspension and steering components so the new tires are not being fitted to a truck with worn parts that can affect tracking or clearance.

After installation, check inflation pressure, look for any contact at full steering lock, and recheck for rubbing once the truck is on the ground. A short, careful road test helps confirm balance, vibration, and general behavior before regular use, particularly on older pickups that may have uneven wear or prior wheel changes.

Tires on a collector 1991 Nissan Trucks D21 should be maintained with regular pressure checks, visual inspections, and attention to age-related condition even if the truck is driven only occasionally. Radials that spend long periods parked can still develop cracking, flat spotting, air loss, or sidewall deterioration, especially when storage conditions are poor.

Good maintenance includes keeping the truck out of prolonged heat and direct sunlight, moving it periodically, and checking tread and sidewalls before each road outing. A D21 used for shows, weekend drives, or light truck duty still needs the same basic care routine, because low annual mileage does not prevent tire aging.