The 1981 Ford Mustang sits in an interesting transition point for the Fox-platform era, when Ford was balancing sporty styling, everyday drivability, and a wider range of trims than many buyers expect. Tire fitment reflects that variety, with radial sizes spanning 13-inch, 14-inch, and millimetric TRX applications depending on the exact version of the car. That makes this Mustang less about picking any tire for the model name and more about matching the correct size to the specific sub-model and wheel package. Available choices also vary by brand, sidewall treatment, and tire series, which matters whether the goal is a cleaner restoration look or dependable road use on an existing setup.
Which Tire Size Is Right for The 1981 Ford Mustang
The 1981 Ford Mustang uses four primary tire sizes, and the right one depends on the exact sub-model and wheel setup. Three sizes use inch-based 13-inch or 14-inch rims, while the Cobra's 190/65R390 uses a millimetric TRX fitment. Before choosing a tire, confirm the specific Mustang sub-model and verify whether the car still has its original wheel diameter rather than an aftermarket replacement.
185/80R13 is a metric radial size in which 185 indicates nominal section width in millimeters, 80 is the aspect ratio, and 13 is the wheel diameter in inches. On the 1981 Ford Mustang, this size serves as a primary radial fitment on a 13-inch rim and suits buyers keeping the standard smaller-wheel setup. Available choices include narrow whitewall and wide whitewall styles from Maxxis, BFGoodrich, and Coker Classic across several radial series. It is the right place to start when maintaining the Base model's original size format and overall visual character.
190/65R390 is a metric radial size that uses a 190-millimeter nominal width, a 65-series profile, and a 390-millimeter rim diameter rather than an inch-based wheel. That millimetric TRX format makes it distinct from the other 1981 Ford Mustang fitments and ties tire selection closely to wheel identification. The available choice in this size is a Michelin TRX-B blackwall radial, which preserves the specialized TRX sizing convention. This size should be evaluated carefully by Cobra owners who need to confirm that the car still wears the correct 390mm wheels.
175/75R14 is a metric radial size with a 175-millimeter nominal section width, a 75-series aspect ratio, and a 14-inch rim diameter. On the 1981 Ford Mustang, it applies to certain Ghia and V8 configurations, making sub-model and wheel verification more important than the model name alone. The available product in this size is a Travelstar UN106 radial with a narrow whitewall presentation, giving it a traditional look on the proper 14-inch wheel. This size is a useful match for owners keeping a narrower 14-inch fitment rather than stepping into the wider 185-section alternative.
185/75R14 is a metric radial size that combines a 185-millimeter nominal section width with a 75-series profile on a 14-inch rim. It is one of the 14-inch primary fitments used on certain 1981 Ford Mustang Ghia and V8 applications, so wheel and sub-model confirmation still matters. Buyers can choose among narrow whitewall options from Tornel, Maxxis, and Travelstar, with series such as Tornel Classic, Classic Whitewall MA-1, and UN106 offering different restoration-oriented presentations. This size deserves attention when the car already uses the wider 14-inch setup and the goal is to preserve that stance and appearance.
Tire fitment for the 1981 Ford Mustang varies by sub-model, so identifying the exact version of the car is the first step. The biggest difference is the Cobra's TRX millimetric setup versus the inch-based 13-inch and 14-inch radial fitments used elsewhere in the range.
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1981 Ford Mustang Base
The 1981 Ford Mustang Base uses a 185/80R13 radial, making it the straightforward 13-inch fitment within the lineup. Tire selection centers on sidewall appearance and brand choice, especially for owners trying to balance a stock-looking presentation with regular road use.
The 1981 Ford Mustang Cobra uses the 190/65R390 radial TRX size, which is separate from the inch-based wheel fitments used on other Mustangs. Tire replacement starts with confirming that the car still has its 390mm wheels, since this setup calls for a specialized millimetric tire.
The 1981 Ford Mustang Ghia uses 14-inch radial fitments, with either 175/75R14 or 185/75R14 depending on the specific setup. That makes wheel and existing tire verification important before purchase, especially when choosing between a narrower or slightly wider 14-inch presentation.
The 1981 Ford Mustang V8 also uses 14-inch radial fitments, with 175/75R14 and 185/75R14 both appearing within this sub-model. The practical decision is confirming which 14-inch size is already on the car, then comparing the available whitewall and brand options in that exact fitment.
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 1981 Ford Mustang Tires for Sale
Available 1981 Ford Mustang tires span Maxxis, BFGoodrich, Coker Classic, Michelin, Tornel, and Travelstar, with choices shaped by exact size, tire series, and sidewall style. Most options focus on narrow or wide whitewall radial presentation, while the Cobra's TRX fitment remains a specialized blackwall radial selection.
Common 1981 Ford Mustang tire questions usually come down to exact size by sub-model, TRX versus inch-based wheel fitment, whitewall choices, and what to inspect before putting a collector-era Mustang back on the road.
Tire Size & Fitment
What tire size fits a 1981 Ford Mustang?
A 1981 Ford Mustang can use 185/80R13, 190/65R390, 175/75R14, or 185/75R14, depending on the sub-model and wheel package. The Base uses 185/80R13, the Cobra uses 190/65R390, and Ghia and V8 versions use either 175/75R14 or 185/75R14.
The key is matching the tire to the exact car rather than the Mustang name alone. Start by confirming the sub-model, then verify the wheel diameter on the car, especially if it may have been changed over the years. The Cobra's millimetric TRX setup is especially important to confirm because it does not share the same wheel standard as the inch-based 13-inch and 14-inch fitments.
What size rim does a 1981 Ford Mustang use?
A 1981 Ford Mustang uses more than one rim diameter. Depending on the version, the car may have a 13-inch rim, a 14-inch rim, or a 390mm TRX rim in the Cobra application.
That means wheel confirmation comes before tire selection. An existing tire marked 190/65R390 points to a millimetric TRX wheel, not a conventional 15-inch or 14-inch rim. On cars using 185/80R13, 175/75R14, or 185/75R14, staying with the same labeled wheel diameter is essential, and any car with replacement wheels should be measured and checked before ordering tires by size alone.
Why does the 1981 Ford Mustang have more than one tire size?
The 1981 Ford Mustang was offered in several sub-models with different wheel and tire packages, which is why four primary tire sizes appear across the lineup. The widest distinction is between the Cobra's 190/65R390 TRX fitment and the inch-based 13-inch and 14-inch radial sizes used on other versions.
That variety means two Mustangs from the same year can need very different tires. Ghia and V8 cars also overlap within 14-inch sizing, so even within the same sub-model family it helps to inspect the wheels and current tire markings. Choosing by year and model alone can lead to the wrong diameter, wrong profile, or the wrong wheel standard entirely.
Choosing the Right Tire
What should I consider when choosing a 1981 Ford Mustang tire?
Start with the exact primary size for the car: 185/80R13, 190/65R390, 175/75R14, or 185/75R14. From there, compare construction, wheel compatibility, sidewall style, brand, tire series, and whether the car is being kept close to its original visual character or simply prepared for regular road use.
A Base model owner may be deciding among whitewall presentations in 185/80R13, while a Cobra owner is mainly focused on retaining the correct TRX fitment. On 14-inch Ghia and V8 applications, the decision often comes down to confirming whether the car uses the 175 or 185 section width. Matching the current wheel setup first prevents confusion later in the buying process.
What sidewall styles are available for 1981 Ford Mustang tires?
Sidewall choices for the 1981 Ford Mustang include narrow whitewall, wide whitewall, and blackwall depending on the size. The 13-inch and 14-inch inch-based radial options lean toward whitewall styling, while the 190/65R390 TRX Cobra fitment is available as a blackwall radial.
That difference matters visually because the sidewall treatment can change the car's whole presentation without changing the size itself. A wide whitewall suits buyers looking for a more traditional restoration-oriented look, while narrow whitewalls feel more restrained. On a Cobra with TRX wheels, the blackwall presentation keeps the specialized millimetric setup intact rather than trying to imitate a different trim's appearance.
What brands offer tires for the 1981 Ford Mustang?
Brands available across 1981 Ford Mustang tire sizes include Maxxis, BFGoodrich, Coker Classic, Michelin, Tornel, and Travelstar. Brand availability depends on the specific fitment, so not every name appears in every size.
That makes the correct tire size the first filter, with brand coming second. The Base model's 185/80R13 has multiple whitewall choices from several brands, and 185/75R14 also offers a broader comparison set. By contrast, the Cobra's 190/65R390 TRX fitment is much more specialized, so selection is shaped by the wheel system itself rather than by a wide assortment of brands.
Restoration & Appearance
Which tire should I choose for a period-style 1981 Ford Mustang?
A period-style 1981 Ford Mustang starts with using the correct primary size for the exact sub-model and wheel package. That could mean 185/80R13 on a Base model, 190/65R390 on a Cobra, or one of the two 14-inch radial sizes on Ghia and V8 cars.
After size is confirmed, appearance usually comes down to sidewall treatment and the overall character of the tire series. Whitewall options can support a more traditional presentation on inch-based fitments, while the TRX Cobra setup has its own distinct look tied to the millimetric wheel system. Buyers chasing exact originality should still compare against marque references and the car's own historical details.
How does tire construction affect the appearance of a restored 1981 Ford Mustang?
The 1981 Ford Mustang uses radial tire fitments across its covered sizes, so the visual question is less about switching between bias-ply and radial and more about choosing the right radial style. Sidewall design, section width, and whether the car wears inch-based or TRX millimetric tires all influence the finished look.
A wide whitewall on a 13-inch tire creates a very different impression than a narrow whitewall on a 14-inch setup, even though both are radial constructions. The Cobra's TRX tire also carries a distinct visual identity because of its specialized sizing format. Keeping the correct size and wheel system in place usually matters more to appearance than chasing a dramatic style change within the same fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1981 Ford Mustang?
Yes, modifications can change tire fitment on a 1981 Ford Mustang even when the tire size itself sounds correct. Aftermarket wheels, altered offsets, suspension changes, or body modifications can affect clearance at the fenders, steering components, and wheel openings.
That matters even more on a car with multiple original tire diameters and the possibility of TRX or inch-based wheels. A Mustang that has been lowered or fitted with different wheels should be checked carefully before replacing tires by the original specification alone. Confirm the wheel diameter actually on the car, then inspect for turning clearance and suspension travel before settling on a replacement size.
What should I inspect before driving a 1981 Ford Mustang on new tires?
Before driving a 1981 Ford Mustang on new tires, inspect the wheels for the correct diameter and condition, confirm proper inflation, and look over the suspension and steering for obvious wear. Lug hardware, valve stems, and the age and condition of any spare tire also deserve attention on a collector-era car.
A short test drive should include listening for rubbing and checking that the tires center properly within the wheel openings. It also helps to recheck pressure after the first drive and inspect for any signs of uneven contact or interference. On a Cobra, verify the TRX wheel-and-tire setup carefully, since millimetric fitment leaves less room for assumption than standard inch-based wheels.
How should tires on a collector 1981 Ford Mustang be maintained?
Tires on a collector 1981 Ford Mustang should be maintained with regular pressure checks, visual inspections, and careful storage habits. Even on low-mileage cars, look for sidewall cracking, tread separation, cuts, bulges, and slow air loss, since age often matters as much as mileage.
Storage conditions can make a big difference over time. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires between drives. It is also smart to move the car periodically or avoid leaving it parked in one position for extended stretches. Any Mustang that sits often should have its tires inspected before longer road use, not just at annual mileage intervals.
