The 1978 Lincoln Continental sits squarely in the late full-size luxury era, when Lincoln emphasized long-wheelbase comfort, formal styling, and a distinctly American road presence. That same year also included the Continental Mark V and Versailles under the broader Continental name, so tire selection starts with identifying the exact sub-model and wheel diameter. Primary fitments for the 1978 Lincoln Continental family are radial, using JR78-15, LR78-15, or FR78-14 depending on configuration. For owners focusing on a traditional look, LR78-15 is also available in a bias-look radial with a narrow whitewall presentation. The right choice comes down to matching the car's exact setup, preserving the appearance you want, and confirming wheel compatibility before installation.
Which Tire Size Is Right for The 1978 Lincoln Continental
Three tire sizes apply to the 1978 Lincoln Continental family, and the correct one depends on the exact sub-model and wheel diameter. Base and Mark V models use 15-inch radial sizes, while the Versailles uses a 14-inch radial size. Before choosing a tire, confirm whether the car is a Base, Mark V, or Versailles and verify the actual wheel diameter on the vehicle, especially if wheels have ever been changed.
JR78-15 is a vintage alphanumeric radial size in which the letter and series identify the tire's sizing class, the R indicates radial construction, and 15 identifies the rim diameter in inches. On the 1978 Lincoln Continental family, this is one of the 15-inch radial fitments used on certain Base and Mark V applications. Its alphanumeric format reflects late-1970s sizing practice, so it is especially relevant for owners trying to keep the car's era-appropriate tire profile. Choosing this size starts with confirming that the vehicle actually uses the JR78-15 setup rather than the wider LR78-15 alternative.
LR78-15 is a vintage alphanumeric radial size, with the letter and series indicating its size class, the R marking radial construction, and the 15 showing a 15-inch rim. For the 1978 Lincoln Continental family, it is used on certain Base and Mark V configurations. Available LR78-15 product choices include Firestone's Wide Oval Radial series with a narrow whitewall sidewall and a bias-look radial presentation. This size is worth close attention if you want a 15-inch fitment that keeps a traditional late-1970s luxury-car look while still staying within the correct primary size range for the car.
FR78-14 is a vintage alphanumeric radial size that uses an older American sizing convention, with the R indicating radial construction and the 14 identifying a 14-inch rim diameter. On the 1978 Lincoln Continental line, this size is tied to the Versailles rather than the larger 15-inch-wheel configurations. That makes it an important distinction for buyers who may be shopping by model name alone. Selecting FR78-14 means confirming the car is actually a Versailles and checking that it still carries the proper 14-inch wheel setup before comparing tire options.
Sub-model fitment matters on the 1978 Lincoln Continental because the Base and Mark V share 15-inch radial sizing, while the Versailles uses a different 14-inch radial setup. Checking the exact sub-model keeps the search focused on the correct tire size and wheel diameter before comparing styles or product details.
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1978 Lincoln Continental Base
The 1978 Lincoln Continental Base uses 15-inch radial fitments and may be equipped with either JR78-15 or LR78-15. Tire selection for the Base starts with confirming which of those two sizes is on the car now, then comparing available products by appearance, construction style, and wheel compatibility.
The 1978 Lincoln Continental Mark V also uses 15-inch radial fitments, with JR78-15 and LR78-15 both associated with this sub-model. That means the key step is verifying the exact size and wheel setup on the car before choosing between period-style radial options and sidewall presentations.
The 1978 Lincoln Continental Versailles uses the FR78-14 radial size rather than the 15-inch sizes found on the larger Continental variants. For Versailles owners, the main priority is confirming the 14-inch wheel setup so the tire search stays centered on the correct fitment for that specific sub-model.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1978 Lincoln Continental Tires for Sale
Available 1978 Lincoln Continental tire choices currently center on LR78-15, including a Firestone Wide Oval Radial with a narrow whitewall and bias-look radial construction. That gives buyers a period-style 15-inch option to compare by appearance, rim-width range, and overall presentation.
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Bias Profile Radial
Firestone Steel Belted 721 |.75 Inch Whitewall | LR78-15
These FAQs focus on 1978 Lincoln Continental tire sizes, sub-model differences, 14-inch versus 15-inch wheel fitment, radial construction, appearance choices, and the maintenance checks worth making before putting a collector-era Lincoln back on the road.
Tire Size & Fitment
What tire size fits a 1978 Lincoln Continental?
A 1978 Lincoln Continental can use JR78-15, LR78-15, or FR78-14, depending on the exact sub-model. Base and Mark V applications use the 15-inch JR78-15 or LR78-15 radial sizes, while the Versailles uses FR78-14. All three are vintage alphanumeric radial sizes rather than modern metric tire sizes.
The practical step is identifying whether the car is a Base, Mark V, or Versailles and then confirming the wheels actually on the vehicle. A car that has been modified over the years may no longer carry its original wheel diameter, so checking both the sidewall size and the wheel itself helps avoid choosing a tire that belongs to a different Continental variant.
What size rim does a 1978 Lincoln Continental use?
The 1978 Lincoln Continental family uses either a 15-inch or 14-inch rim, depending on sub-model. JR78-15 and LR78-15 are 15-inch tire sizes used on Base and Mark V applications, while FR78-14 is a 14-inch size used on the Versailles. Rim diameter is built directly into those tire sizes.
That makes wheel confirmation one of the first fitment checks to make before ordering tires. A 15-inch tire will not work on a 14-inch wheel, and a Versailles should not be treated like a Base or Mark V simply because it shares the Continental name. Measuring the actual wheel on the car is especially important when prior owners may have changed wheels.
Do all 1978 Lincoln Continental sub-models use the same tire size?
No, the 1978 Lincoln Continental sub-models do not all use the same tire size. The Base and Mark V are associated with JR78-15 and LR78-15, while the Versailles uses FR78-14. That means there is both a size difference and a rim-diameter difference across the covered Continental models.
This matters because shopping only by year, make, and model can lead to the wrong tire when the sub-model is overlooked. A buyer choosing for a Versailles needs to stay with the 14-inch FR78-14 fitment path, while Base and Mark V owners need to confirm which of the two 15-inch alphanumeric radial sizes is actually on the car.
Choosing the Right Tire
What should I consider when choosing a tire for a 1978 Lincoln Continental?
Start with the exact sub-model and correct tire size, since a 1978 Lincoln Continental may use JR78-15, LR78-15, or FR78-14. The next decision is wheel diameter confirmation, because Base and Mark V applications use 15-inch sizes while the Versailles uses a 14-inch size. Construction is simpler here because the primary fitments are radial.
After size and wheel checks, focus on the kind of presentation you want from the car. Some owners want a traditional luxury-car look with a whitewall treatment, while others are mainly concerned with staying in the correct vintage sizing format. Any car with replacement wheels or suspension changes deserves a fresh clearance and compatibility check before the final tire choice.
What sidewall styles are available for 1978 Lincoln Continental tires?
The available sidewall style currently shown for this 1978 Lincoln Continental fitment is a narrow whitewall in LR78-15. That style appears on a Firestone Wide Oval Radial product with a bias-look radial presentation. It suits the formal, late-1970s luxury-car character many owners want to preserve.
Sidewall style affects the car's appearance more than the basic fitment, so it should be chosen only after the correct size is confirmed. A whitewall can support a more restoration-oriented look, but the right visual choice still depends on the exact sub-model, the wheels on the car, and whether the goal is authenticity-inspired presentation or simply a traditional period feel.
What brands offer tires for the 1978 Lincoln Continental?
Current product coverage for this 1978 Lincoln Continental fitment includes Firestone in LR78-15. The available tire is part of the Wide Oval Radial series and combines a narrow whitewall sidewall with a bias-look radial construction style. That gives shoppers at least one recognized vintage-style option in the correct 15-inch size family.
Brand should be considered alongside the size, wheel diameter, and visual presentation rather than on its own. A Firestone LR78-15 may make sense for a Base or Mark V owner seeking a traditional look, but it does not replace the need to verify whether the car uses JR78-15 or LR78-15 and whether the wheel width falls within the tire's range.
Restoration & Appearance
Which tire should I choose for a period-style 1978 Lincoln Continental?
A period-style choice for a 1978 Lincoln Continental starts with the correct alphanumeric radial size for the exact sub-model. Base and Mark V cars stay in the 15-inch JR78-15 or LR78-15 family, while the Versailles uses FR78-14. Keeping the correct vintage sizing format does a lot to preserve the car's proper late-1970s visual character.
From there, appearance details such as sidewall treatment become more important. An LR78-15 narrow whitewall bias-look radial can support a traditional luxury-car presentation, but exact restoration standards vary by individual car. Owners pursuing strict originality should compare tire appearance against period photos, marque-club references, and vehicle-specific documentation before settling on a final style.
How does tire construction affect the appearance of a restored 1978 Lincoln Continental?
Construction affects both stance and visual character, especially on a large late-1970s luxury car like the 1978 Lincoln Continental. The primary sizes for this model family are radial, and one available LR78-15 option uses a bias-look radial design. That combination can help retain a more traditional tire presentation without leaving the radial fitment family.
For a restored car, the visual difference often comes from the overall profile and sidewall treatment rather than the construction label alone. A narrow whitewall or a more traditional-looking radial can change the car's presence noticeably. The best approach is to match the tire's look to the sub-model, wheel setup, and restoration goal instead of treating every radial in the right size as visually interchangeable.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1978 Lincoln Continental?
Yes, modifications can affect tire fitment on a 1978 Lincoln Continental even when the tire size sounds correct. Aftermarket wheels, changes in wheel width, suspension alterations, or body modifications can all change how a JR78-15, LR78-15, or FR78-14 tire sits in the wheel opening. That is especially important because this model family already spans both 14-inch and 15-inch wheel setups.
A Continental that has been lowered, fitted with replacement wheels, or altered for stance should be checked for steering clearance, fender clearance, and wheel compatibility before mounting new tires. Even a stock-size tire can become problematic on a non-stock wheel. Confirming the actual wheel diameter and width on the car is the safest starting point before moving forward.
What should I inspect before driving a 1978 Lincoln Continental on new tires?
Before driving a 1978 Lincoln Continental on new tires, inspect the wheels, valve stems, and overall wheel hardware, then make sure the tire size matches the car's sub-model and rim diameter. It is also smart to look over the suspension and steering for looseness or wear, since those issues can affect how a large, heavy luxury car tracks on fresh tires.
A careful road-readiness check should also include tire pressure, lug nut torque, and visual clearance at full steering lock. After the first miles, recheck pressure and look for any signs of rubbing or uneven contact. Collector cars that have sat for long periods deserve extra attention because old alignment, brake, or suspension issues often show up once new tires are installed.
How should tires on a collector 1978 Lincoln Continental be maintained?
Tires on a collector 1978 Lincoln Continental should be maintained with regular pressure checks, periodic visual inspections, and attention to age as well as tread depth. Low-use collector cars often wear their tires very little, but sidewall cracking, flat spotting, air loss, and general aging can still become concerns over time, especially if the car spends long periods parked.
Storage conditions matter almost as much as mileage. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve tire condition. It also helps to move the car occasionally or use proper storage practices to reduce flat spotting. Before any longer drive, inspect the sidewalls and tread closely rather than assuming low miles mean the tires are road-ready.
