1978 Plymouth Trailduster Tires

A 1978 Plymouth Trailduster can use 700-15, H78-15, L78-15, E78-15, or G78-15, all in bias-ply construction on 15-inch rims. The exact size depends on the Trailduster's sub-model and GVWR grouping, so there is not one universal primary size for every 1978 example.

The most important next step is matching the tire to the exact vehicle configuration rather than choosing by appearance alone. A Trailduster that uses E78-15 or G78-15 follows a different fitment path than one set up for H78-15, L78-15, or 700-15, and any wheel, suspension, or aftermarket changes should be checked before ordering.

The 1978 Plymouth Trailduster uses 15-inch rims across its primary tire fitments. Whether the truck is set up for 700-15, E78-15, G78-15, H78-15, or L78-15, the common denominator is a 15-inch rim diameter rather than multiple rim diameters across the model range.

That does not mean every 15-inch wheel works with every Trailduster tire size. Rim width still matters, especially when moving between narrower and wider bias-ply sizes or considering a radial equivalent, so the actual wheel on the vehicle should be measured and matched to the intended tire before making a construction or size change.

No, 1978 Plymouth Trailduster sub-models do not all use the same tire size. Fitment varies by engine and GVWR grouping, with some versions using 700-15, H78-15, or L78-15, while others use E78-15, G78-15, or H78-15. The Sno Filter Package version narrows the choice to 700-15.

That variation makes the sub-model more important than many buyers expect. Before selecting a tire, confirm the truck's exact GVWR-based configuration and inspect the wheels already on it, especially if the Trailduster has had decades of service, replacement wheels, or suspension changes that may no longer reflect its original fitment path.

H78-15 is a bias-ply tire size on the 1978 Plymouth Trailduster. It uses the vintage alphanumeric sizing system, and on this vehicle it belongs to the original-style bias-ply fitment family rather than serving as a primary radial size.

That matters because choosing H78-15 usually means deciding whether to keep the traditional bias-ply construction or move to one of the radial equivalents tied to that size. A conversion should include a check of wheel width, overall clearance, and the truck's intended use so the new tire matches both the vehicle setup and the owner's expectations.

Radial equivalents for H78-15 on a 1978 Plymouth Trailduster include 215R15 as an 80-series metric radial, P225/75R15 as a 75-series P-metric radial, P235/70R15 as a 70-series P-metric radial, and 760R15 as a bias-look radial. The recommended rim-width range for these equivalents is 6-8 inches.

Those choices give different sizing conventions and visual character while staying in the same general fitment conversation. The bias-look radial keeps a more traditional presentation, while the metric and P-metric options follow modern radial formats, so the wheel width, vehicle stance, and clearance at full steering lock should all be confirmed before making the switch.

Start by confirming the Trailduster's exact primary size, then match any radial equivalent to the correct 15-inch wheel and the appropriate rim-width range for that size. H78-15, L78-15, E78-15, and G78-15 all have radial-equivalent paths, but each one follows its own equivalent sizing options.

A careful conversion also means checking wheel width, steering clearance, fender clearance, suspension condition, and the truck's actual ride height. The goal is not just finding a same-diameter wheel fitment, but making sure the chosen radial alternative works with the vehicle's present setup and the way the Trailduster will be driven.

A 700-15 choice starts with confirming that the Trailduster sub-model actually uses that numeric bias-ply size. From there, the main factors are sidewall style, tire series, intended use, and wheel compatibility, since 700-15 is offered in classic passenger-style whitewall form as well as blackwall military and truck-oriented designs.

Firestone, BFGoodrich, and STA all appear in 700-15, but they serve different visual and practical priorities. Some focus on traditional bias-ply presentation, while others lean toward transport, traction, or military-style use, so the better question is whether the truck is being restored for appearance, driven as a utility vehicle, or set up somewhere in between.

Sidewall choices for 1978 Plymouth Trailduster tires include blackwall, wide whitewall, narrow whitewall, and dual-white-stripe depending on the tire size selected. The broadest cosmetic spread appears in sizes such as L78-15, while truck-oriented series in several sizes stay closer to a blackwall presentation.

That makes sidewall style one of the biggest visual decisions on this vehicle. A whitewall or stripe treatment can push the Trailduster toward a more period-style, street-oriented look, while blackwall truck tires keep a more work-ready character, so the right choice depends on the exact size, the vehicle's finish, and the owner's restoration goals.

Available tire brands for the 1978 Plymouth Trailduster include Firestone, BFGoodrich, Coker Classic, and STA. Brand availability changes by size, with some sizes centered on classic passenger-style bias-ply offerings and others including more truck, traction, or military-style series.

The practical comparison is less about brand prestige and more about what each brand offers in the exact size your Trailduster uses. Looking at series, sidewall treatment, load-related specifications where shown, and rim-width compatibility will usually narrow the field faster than starting with brand preference alone.

A period-style 1978 Plymouth Trailduster usually starts with keeping the correct primary bias-ply size for the truck's exact sub-model and GVWR grouping. Once the size is confirmed, the choice often comes down to whether the vehicle should wear a classic passenger-style bias-ply tire, a truck-oriented blackwall, or a bias-look radial where one exists.

The best visual match depends on how the vehicle is being restored and what era-specific look the owner wants to emphasize. Exact originality claims should be checked against vehicle-specific references such as marque literature, period photos, or restoration records, especially when deciding between whitewall, stripe, or truck-style blackwall presentations.

Tire construction changes more than ride feel on a restored 1978 Plymouth Trailduster; it also changes the vehicle's visual character. A bias-ply tire keeps the traditional vintage sizing format and period-style presentation, while a radial equivalent can shift the look toward a more modern profile even when it remains within the correct general fitment family.

That difference is especially important on a square-bodied utility vehicle where tire stance is easy to notice. Buyers who want a more traditional appearance often stay with bias-ply or consider a bias-look radial, while those focused on road use may be more comfortable evaluating a metric or P-metric radial after checking wheel and clearance details.

Yes, modifications can affect tire fitment on a 1978 Plymouth Trailduster even when the wheel still measures 15 inches. Aftermarket wheels, different wheel widths, suspension lifts or lowering changes, replacement springs, and body or steering changes can all alter how a 700-15, E78-15, G78-15, H78-15, or L78-15 tire sits on the vehicle.

A Trailduster that has been changed over time should be inspected as it exists today rather than assumed to match original fitment. Measuring wheel width, checking clearance through full steering travel, and confirming space at the fenders and suspension components can prevent problems before moving to a new bias-ply tire or radial equivalent.

Before driving a 1978 Plymouth Trailduster on new tires, inspect the wheels for correct diameter and sound condition, verify inflation, and look over the suspension and steering for looseness or wear. It also helps to confirm that the selected tire size matches the truck's sub-model and that nothing in the wheel wells interferes with the new fitment.

A short, careful first drive is useful for checking straight-line behavior, steering clearance, and any signs of rubbing. Collector trucks that have sat for long periods also deserve a check of wheel hardware, brake condition, and air retention after installation, since a fresh set of tires works best when the rest of the running gear is equally ready.

Collector-use tires on a 1978 Plymouth Trailduster should be maintained with regular pressure checks, periodic visual inspections, and clean storage habits. Even when tread wear is low, aging still matters on a low-mileage truck, so sidewall cracking, cuts, bulges, and repeated air loss should be taken seriously.

Long periods of storage are easier on the tires when the vehicle is kept away from prolonged heat, direct sunlight, excess moisture, and ozone sources. Rolling the truck occasionally, checking for flat-spotting, and inspecting the tires before each driving season can help preserve both appearance and roadworthiness on a vintage utility vehicle.