1978 Dodge Pickup Tires

A 1978 Dodge Pickup does not use one universal tire size. Depending on the exact truck, primary fitments include G78-15, H78-15, L78-15, LR78-15, 700-15, 750-16, 800-16.5, 875-16.5, 950-16.5, 8.00R16.5, 8.75R16.5, and 9.50R16.5.

The correct choice depends on the truck’s series, whether it is 4x2 or 4x4, GVWR, wheelbase, and in some cases dual rear wheel or snow-plow configuration. Start by confirming the exact sub-model and wheel diameter on the truck, because 15-inch, 16-inch, and 16.5-inch applications all appear in this model year.

A 1978 Dodge Pickup can use 15-inch, 16-inch, or 16.5-inch rims, depending on the exact configuration. The 15-inch rim sizes support fitments such as G78-15, H78-15, L78-15, LR78-15, and 700-15, while 750-16 uses a 16-inch rim and several heavier-duty truck sizes use 16.5-inch rims.

Rim diameter is the first thing to verify before replacing tires on this truck. A 16-inch and a 16.5-inch wheel are not the same, and the 1978 Dodge Pickup uses both across different sub-models. Checking the wheel itself prevents ordering the right-looking tire in the wrong diameter.

The 1978 Dodge Pickup covers a wide range of light-duty, heavy-duty, two-wheel-drive, four-wheel-drive, snow-plow, crew cab, and dual rear wheel applications, so tire size changes with the truck’s configuration. Some versions use 15-inch alphanumeric or numeric sizes, while others move to 16-inch or 16.5-inch truck tires.

That variation means tire selection is tied to the truck’s exact job and wheel setup rather than just the model name. A W150 4x4, a D300 dual rear wheel truck, and a snow-plow-equipped W200 can all belong to the same model year but still need very different tire sizes and constructions.

LR78-15 is a radial fitment on the 1978 Dodge Pickup. It appears on selected D100 4x2 and W150 4x4 applications, and the available product in this size uses a bias-look radial construction with a traditional narrow whitewall presentation.

That matters because LR78-15 is not the same kind of tire as the bias-ply G78-15, H78-15, or L78-15 sizes that also appear on 15-inch Dodge pickups of the same year. Before replacing it, confirm the truck’s current wheel and tire setup so the new tire matches the intended construction and overall appearance.

G78-15 has four radial-equivalent options: 205R15, P215/75R15, P225/70R15, and 710R15. H78-15 can be compared with 215R15, P225/75R15, P235/70R15, and 760R15. L78-15 has equivalents in 235R15, P235/75R15, P255/70R15, and 820R15.

Those options represent three modern radial sizing approaches plus a bias-look radial for each original bias-ply size. The recommended rim-width range is 6-8 inches for all three groups, but wheel compatibility, tire dimensions, and truck clearance still need to be checked before using any equivalent on a 1978 Dodge Pickup.

Start with the exact original size and wheel diameter on the truck, then compare only the radial-equivalent sizes that correspond to that bias-ply fitment. On a 1978 Dodge Pickup, usable equivalents are shown for G78-15, H78-15, and L78-15, while other sizes in the range do not carry the same equivalent listings.

A conversion should also account for rim width, overall tire dimensions, steering clearance, and the truck’s suspension and ride-height condition. The same caution applies if the pickup has aftermarket wheels or other modifications, because a radial equivalent is an alternative to evaluate, not something to assume will interchange automatically.

The most important factors are the truck’s exact sub-model, wheel diameter, and original tire size. A 1978 Dodge Pickup can require anything from a 700-15 or G78-15 on lighter applications to 950-16.5 or 8.00R16.5 on heavier trucks, so size and construction come before brand or appearance.

After confirming fitment, compare construction type, tire series, sidewall style, rim-width compatibility where stated, and the truck’s intended use. A restoration-oriented W150 may call for a very different look than a work-focused D300, even when both choices stay within the correct period-style tire format.

Sidewall choices for the 1978 Dodge Pickup include blackwall, wide whitewall, narrow whitewall, and dual-white-stripe styles, depending on the tire size. The broader decorative sidewall options appear mainly in 15-inch and 16-inch classic sizes, while many heavier-duty 16.5-inch truck tires remain blackwall only.

That means appearance choice is tied closely to the size your truck actually uses. A W150 with 700-15 can support a very different visual presentation than a D300 on 800-16.5 or 950-16.5, so the correct fitment should be established first and the sidewall treatment chosen second.

Tires for the 1978 Dodge Pickup are available from Coker Classic, BFGoodrich, Firestone, Lester, STA, and Firestone Steel Belted, depending on the size. Brand availability changes quite a bit across the fitment range, with lighter-duty classic sizes showing more decorative choices and heavier truck sizes leaning strongly toward STA blackwall products.

Brand should be compared only after the correct size and construction are confirmed. Once fitment is settled, the brand can help narrow the decision by tire series, sidewall style, and overall tire character, whether the goal is a traditional highway look, whitewall presentation, or a more work-oriented truck tread.

A period-style choice starts with the exact original fitment format used by the truck, whether that is an alphanumeric bias-ply size such as G78-15 or L78-15, a numeric truck size like 700-15 or 950-16.5, or one of the radial applications such as LR78-15. Matching the truck’s actual size and construction keeps the overall presentation consistent.

Once the proper fitment is confirmed, the visual direction can be refined through blackwall, whitewall, narrow whitewall, or truck-tread styling where those choices exist. For owners pursuing exact restoration accuracy, vehicle-specific historical references and marque knowledge are still worth checking before settling on a particular sidewall treatment or brand.

Tire construction changes the look as well as the driving character of a restored 1978 Dodge Pickup. Bias-ply tires preserve the original-style sizing language and traditional profile associated with many trucks of the period, while radial applications such as LR78-15 or bias-look radials can keep a more classic shape than a modern metric conversion.

That visual difference matters most on 15-inch applications where the owner may be choosing between bias-ply fitment and a radial alternative. The best appearance result usually comes from deciding early whether the truck is being restored as a period-style pickup, a road-use driver, or a more utility-minded truck.

Yes, modifications can affect tire fitment on a 1978 Dodge Pickup even when the replacement tire is the correct nominal size. Aftermarket wheels, changes in wheel width, suspension lifts or lowering, altered springs, and body or fender work can all influence how much room the tire has at steering lock and under load.

That is especially important on this truck because the model year already spans 15-inch, 16-inch, and 16.5-inch applications with both light-duty and heavy-duty setups. Any truck that has been changed from its original wheel or suspension configuration should be measured and inspected before a new tire is selected.

Before road use, inspect the wheels for damage or corrosion, confirm the rim diameter matches the tire, and make sure the tires seat and inflate properly. It is also wise to check lug hardware, steering response, brake feel, and visible clearance around the fenders, suspension, and chassis once the truck is back on the ground.

A 1978 Dodge Pickup may be decades into its service life, so suspension wear can affect how a new tire behaves even when the size is correct. A short, careful test drive followed by another inspection for rubbing, air loss, or unusual movement helps catch issues before the truck sees regular use.

Collector-truck tires should be kept properly inflated, inspected regularly for cracking, bulges, cuts, and uneven wear, and protected from long periods of sunlight, heat, moisture, and ozone exposure. That applies whether the 1978 Dodge Pickup wears decorative 15-inch whitewalls or heavier-duty blackwall truck tires on 16-inch or 16.5-inch wheels.

Low-use vehicles often age their tires out before they wear them out, so tread depth alone is not enough. It helps to check air pressure and condition before every drive, and extra attention is worthwhile after long storage periods or before any longer highway trip in an older pickup.