The 2004 Ford Mustang sits at the end of the SN-95 era, a point where this long-running pony car had developed into a broad lineup that ranged from everyday street cars to more serious performance versions. That matters because tire fitment changes with the model, not just the name on the fender. A 2004 Ford Mustang uses one of three primary radial sizes: 225/55R16, 245/45R17, or 275/40R17, depending on the sub-model. Available choices include blackwall performance radials along with RWL and redline options in select 17-inch sizes. The right pick comes down to matching the exact trim, wheel diameter, intended appearance, and how the car is actually driven.
Which Tire Size Is Right for The 2004 Ford Mustang
Three tire sizes apply to the 2004 Ford Mustang, and the correct one depends on the specific sub-model and wheel diameter. The Base model uses a 16-inch radial, while the GT, Mach I, and SVT Cobra use 17-inch radials in different widths and profiles. Before comparing brands or sidewall treatments, confirm the exact trim and make sure the car still has the wheel diameter and overall setup it is supposed to use.
225/55R16 is a metric radial size in which 225 is the nominal section width in millimeters, 55 is the aspect ratio, R indicates radial construction, and 16 is the rim diameter in inches. On the 2004 Ford Mustang, this size is used on a 16-inch wheel and is the fitment tied to the Base model. Available choices in this size center on BFGoodrich g-Force series tires with blackwall styling. It is the size to evaluate when the car retains its original 16-inch wheel setup and the goal is a proper match for stock-type Base fitment.
245/45R17 is a metric radial size with a 245-millimeter nominal width, a 45-series profile, radial construction, and a 17-inch rim diameter. This size serves the 2004 Ford Mustang GT and Mach I, placing it in the middle of the Mustang range for this model year. Product choices are broader here, including BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac options, with blackwall, RWL, and redline sidewall treatments depending on the tire series. It is the right size to review when a GT or Mach I still runs its correct 17-inch wheel diameter and you want to compare both appearance and usage focus.
275/40R17 is a wider metric radial size where 275 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 17 is the wheel diameter. On the 2004 Ford Mustang, this size is associated with the SVT Cobra, so it should not be treated as a universal 17-inch Mustang fitment. Choices include BFGoodrich, Nitto, Michelin, M&H Racemaster, and Pro-Trac products, with blackwall, RWL, and redline presentations available in this category. This is the size to consider when the Cobra retains its proper wheel setup and the buyer wants to balance width, tire character, and period-minded appearance.
Sub-model fitment matters on the 2004 Ford Mustang because tire size changes across the lineup. The first step is identifying whether the car is a Base, GT, Mach I, or SVT Cobra, since wheel diameter and tire width are not the same from one version to the next.
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2004 Ford Mustang Base
The 2004 Ford Mustang Base uses the narrower 16-inch radial fitment in this lineup. That makes tire selection more straightforward, with the focus shifting to choosing among available blackwall performance-oriented options that suit the car's wheel setup and intended street use.
The 2004 Ford Mustang GT uses a 17-inch radial fitment shared with the Mach I. That opens the door to a wider mix of available brands, tire series, and sidewall styles, so the decision becomes less about basic size and more about appearance and driving purpose.
The 2004 Ford Mustang Mach I uses the same 17-inch radial size as the GT. Tire selection therefore centers on choosing the right product type within that size, whether the goal is a straightforward blackwall performance tire or a more distinctive RWL or redline look.
The 2004 Ford Mustang SVT Cobra uses the widest primary tire size in this group, also on a 17-inch wheel. That makes wheel compatibility especially important when comparing options, particularly if the car has changed wheels or suspension settings since new.
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 2004 Ford Mustang Tires for Sale
Available 2004 Ford Mustang tires vary by size, brand, tire series, and sidewall treatment. BFGoodrich, Nitto, Michelin, M&H Racemaster, and Pro-Trac options appear across these fitments, with blackwall choices throughout and RWL or redline styling available in select 17-inch sizes.
These 2004 Ford Mustang tire FAQs focus on the questions that matter most once the exact trim is known, including size and rim fitment, product selection, appearance choices, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2004 Ford Mustang?
A 2004 Ford Mustang uses one of three primary tire sizes, depending on the sub-model. The Base uses 225/55R16, the GT and Mach I use 245/45R17, and the SVT Cobra uses 275/40R17. All of these are radial tire sizes, but they are not interchangeable simply because they belong to the same model year.
The important next step is matching the tire to the exact trim and wheel diameter on the car. A Mustang that has been changed to aftermarket wheels or a different suspension setup may need extra checking for wheel width, clearance, and overall compatibility before choosing a replacement tire.
What size rim does a 2004 Ford Mustang use?
The 2004 Ford Mustang uses either a 16-inch or 17-inch rim, depending on the sub-model. The Base model uses a 16-inch rim with 225/55R16 tires, while the GT, Mach I, and SVT Cobra use 17-inch rims with either 245/45R17 or 275/40R17 tires.
Confirming rim diameter is essential before comparing tires, because a 16-inch tire cannot be mounted on a 17-inch wheel and vice versa. Wheel width also matters once the diameter is confirmed, especially on the 17-inch sizes where available products are built around different rim-width ranges.
Do all 2004 Ford Mustang sub-models use the same tire size?
No. Tire size varies across the 2004 Ford Mustang lineup. The Base model uses 225/55R16, the GT and Mach I share 245/45R17, and the SVT Cobra uses 275/40R17. That means trim level is a real fitment factor, not just a badge difference when it comes to selecting replacement tires.
Two cars from the same year can therefore need different tires even though both are Mustangs. Checking the sub-model first helps avoid choosing the wrong width or the wrong rim diameter, and it becomes even more important if the car has changed hands or has been modified over time.
Choosing the Right Tire
What should I consider when choosing a 2004 Ford Mustang tire?
Start with the exact sub-model, because the 2004 Ford Mustang uses three different radial sizes across the lineup. After confirming the correct size, compare the tire's intended use, rim-width compatibility where stated, sidewall style, and overall product character. That matters more here than chasing a one-size-fits-all answer.
A Base model owner may simply be comparing blackwall street tires in 225/55R16, while a GT, Mach I, or SVT Cobra owner may have more choices in series and styling. Matching the tire to how the car is driven and how the owner wants it to look usually leads to a better decision than focusing on size alone.
What sidewall styles are available for 2004 Ford Mustang tires?
Blackwall is the most common sidewall style across 2004 Ford Mustang tire options. In the 17-inch sizes, select products are also available with RWL and redline sidewalls. Those appearance choices show up in 245/45R17 and 275/40R17, giving GT, Mach I, and SVT Cobra owners more visual variety than the 16-inch Base fitment.
Sidewall style does not change the need to stay with the correct size for the sub-model, but it can strongly affect the car's presentation. A blackwall usually gives a more understated look, while RWL or redline options can add a more distinctive period-inspired visual statement on the right wheel and trim combination.
What brands offer tires for the 2004 Ford Mustang?
Tires for the 2004 Ford Mustang are available from BFGoodrich, Nitto, Michelin, M&H Racemaster, and Pro-Trac, depending on size. Brand choice varies by fitment, so the full range of options is broader in the 17-inch sizes than in 225/55R16. Some choices lean toward street performance, while others have a more specialized character.
The best way to use brand variety is as part of a larger comparison, not as the only decision point. Once the correct size is confirmed, compare series, sidewall treatment, and any rim-width information tied to that tire so the selected product makes sense for both the wheel and the Mustang's intended use.
Restoration & Appearance
Which tire should I choose for a period-style 2004 Ford Mustang?
A period-style approach starts with the correct tire size for the exact 2004 Ford Mustang sub-model. That means 225/55R16 for the Base, 245/45R17 for the GT and Mach I, and 275/40R17 for the SVT Cobra. Using the right size preserves the car's intended stance and keeps the visual proportions closer to what belongs on that version.
After size is sorted out, sidewall style becomes the biggest appearance choice. Blackwall keeps the look restrained, while select 17-inch tires add RWL or redline options for a stronger visual statement. Anyone chasing exact showroom-era detail should also compare the car against marque references and historical photos before deciding on final presentation.
How does tire construction affect the appearance of a restored 2004 Ford Mustang?
Construction is simple on this application because the 2004 Ford Mustang uses radial tires across all primary fitments. That means the appearance differences come less from bias-ply versus radial questions and more from size, sidewall style, and the specific tire series chosen within the proper fitment for the sub-model.
On a restoration-minded car, the wrong width or profile can change the visual balance even when the rim diameter is correct. Keeping the proper 16-inch or 17-inch fitment and choosing a sidewall treatment that matches the owner's goal will usually do more for the Mustang's finished look than changing construction type.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 Ford Mustang?
Yes. Modifications can change tire fitment on a 2004 Ford Mustang even when the car starts with a correct factory-style size. Aftermarket wheels, different wheel widths, suspension changes, or altered ride height can all affect how a 225/55R16, 245/45R17, or 275/40R17 tire sits and clears the body or steering components.
That is why the current wheel and chassis setup should be checked before ordering replacement tires. A Mustang with non-stock wheels may still use the same rim diameter but require closer attention to wheel width, section width, and clearance at full steering lock or suspension travel.
What should I inspect before driving a 2004 Ford Mustang on new tires?
Before driving a 2004 Ford Mustang on new tires, inspect the wheels for damage, confirm the tire size matches the sub-model, and make sure the tires are mounted on the proper rim diameter. It is also worth checking inflation, lug torque, and whether the tires have adequate clearance around suspension and fender areas.
A short road test can reveal issues that are easy to miss while the car is parked. Pay attention to rubbing, vibration, pull, or unusual contact marks, especially if the Mustang has changed wheels, had alignment work, or sat for a long period before receiving the new tires.
How often should tires on a 2004 Ford Mustang be inspected?
Tires on a 2004 Ford Mustang should be inspected regularly, not just when tread looks worn. A quick visual check before routine driving is sensible, and a closer inspection at service intervals helps catch cracking, uneven wear, cuts, bulges, or slow air loss before those issues become more serious.
Cars that are driven infrequently deserve even more attention because age and storage conditions matter as much as mileage. A Mustang that spends long periods parked should have its tire pressure checked often and its sidewalls examined carefully, since collector-style use can hide deterioration that is not obvious from tread depth alone.
