The 1979 Checker Marathon & Taxi came from a distinctly utilitarian American tradition, built for durability, passenger space, and long-service road use rather than annual styling change. By the late 1970s, that made the Marathon and Taxi feel almost purpose-built for owners who still value traditional full-size packaging and unmistakable presence. Tire fitment centers on 15-inch radial sizes, with 215/75R15 and 225/75R15 both used across the lineup. That opens up meaningful choices in whitewall presentation, brand, and touring-oriented radial series, with one all-terrain option also available in 215/75R15. The right selection depends on sub-model, wheel width, intended appearance, and how the car will actually be driven.
Which Tire Size Is Right for The 1979 Checker Marathon & Taxi
The 1979 Checker Marathon & Taxi uses two primary tire sizes, and both are radial tires for 15-inch rims. Because size usage overlaps in some versions and narrows in others, the first step is confirming the exact sub-model and then checking the wheel width on the car. Once that is settled, the real choice becomes profile, whitewall style, brand, and the type of road use the vehicle will see.
215/75R15 is a metric radial size in which 215 is the section width in millimeters, 75 is the aspect ratio, R identifies radial construction, and 15 is the rim diameter in inches. On the 1979 Checker Marathon & Taxi, this size suits 15-inch wheel applications where a slightly narrower radial profile is appropriate. Available choices include BFGoodrich, Coker Classic, American Classic, Maxxis, Tornel, and Travelstar, with sidewall treatments ranging from narrow whitewall and wide whitewall to an RBL all-terrain style. It is a strong candidate for owners balancing traditional appearance, everyday road manners, and wheel-width compatibility.
225/75R15 is also a metric radial size, with a 225-millimeter nominal section width, a 75-series profile, radial construction, and a 15-inch rim diameter. For the 1979 Checker Marathon & Taxi, this size is used on 15-inch wheels where the vehicle setup calls for the wider of the two primary fitments. Product choices include BFGoodrich, Coker Classic, American Classic, Maxxis, and Travelstar, with both narrow and wide whitewall options available across several radial series. This size deserves a close look when carrying capacity, whitewall presentation, or the car's exact passenger configuration affects the final tire choice.
Sub-model fitment matters on the 1979 Checker Marathon & Taxi because some versions can use either primary size while another is tied to the larger one. Checking the exact passenger configuration helps narrow the correct tire choice before comparing sidewall style, brand, or wheel-width compatibility.
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1979 Checker Marathon & Taxi 6 Passenger
The 1979 Checker Marathon & Taxi 6 Passenger can use either of the two primary 15-inch radial sizes. That means the decision usually comes down to confirming the wheel setup on the car and then choosing the look and character you want, from narrow whitewalls to broader traditional whitewall styles.
The 1979 Checker Marathon & Taxi 8 Passenger also uses the same pair of 15-inch radial fitments. Tire selection should focus on which size matches the wheels currently on the vehicle, along with whether the goal is a more understated sidewall or a fuller whitewall presentation.
The 1979 Checker Marathon & Taxi 9 Passenger uses the larger 225/75R15 radial size rather than both primary options. That simplifies the fitment question and shifts attention toward wheel-width compatibility, available whitewall treatments, and the type of service the vehicle is expected to handle.
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 1979 Checker Marathon & Taxi Tires for Sale
Available 15-inch radial choices for the 1979 Checker Marathon & Taxi span BFGoodrich, Coker Classic, American Classic, Maxxis, Tornel, and Travelstar. Across 215/75R15 and 225/75R15, the main differences are whitewall width, tire series, rim-width compatibility, and whether the goal is traditional touring style or a more utility-focused look.
Owners of a 1979 Checker Marathon & Taxi usually need to sort out exact tire size, sub-model fitment, 15-inch wheel compatibility, and whitewall style before choosing a tire. The questions below focus on those decisions, along with practical inspection and road-use checks for a full-size collector vehicle.
Tire Size & Fitment
What tire size fits a 1979 Checker Marathon & Taxi?
The 1979 Checker Marathon & Taxi uses two primary radial tire sizes: 215/75R15 and 225/75R15. Both fit 15-inch rims, but they do not apply the same way across every sub-model. The 6 Passenger and 8 Passenger versions can use either size, while the 9 Passenger version uses 225/75R15.
That means the first job is confirming the exact passenger configuration and the wheels currently on the car. If the vehicle has been changed over the years, verify the actual rim width and compare the installed wheel setup before selecting between the two sizes.
What size rim does a 1979 Checker Marathon & Taxi use?
The tire fitments for a 1979 Checker Marathon & Taxi are built around a 15-inch rim diameter. Both 215/75R15 and 225/75R15 are 15-inch radial sizes, so the wheel diameter remains consistent even though the tire widths differ between the available fitments.
Rim diameter alone is not the whole story, especially on a car that may have seen service replacement wheels over time. Wheel width still matters, so it is worth checking the actual wheel before choosing a tire, particularly when deciding between the narrower 215 and wider 225 size.
Do all 1979 Checker Marathon & Taxi sub-models use the same tire size?
No. The 1979 Checker Marathon & Taxi 6 Passenger and 8 Passenger versions can use either 215/75R15 or 225/75R15, but the 9 Passenger version uses 225/75R15. The overlap makes fitment fairly flexible on some models, but not every sub-model shares the same tire-size range.
That distinction matters because a buyer may see both sizes associated with the Marathon & Taxi and assume either one belongs on every version. It is smarter to match the tire to the exact sub-model first, then confirm the wheel width and current setup before making a final choice.
Choosing the Right Tire
What should I consider when choosing a 215/75R15 or 225/75R15 tire for a 1979 Checker Marathon & Taxi?
Start with the correct primary size for the exact sub-model and wheel setup, since the 1979 Checker Marathon & Taxi uses both 215/75R15 and 225/75R15 depending on configuration. After size is settled, compare construction, rim-width compatibility, load capacity, sidewall style, and whether the tire is meant for traditional touring appearance or more utility-oriented use.
A Checker often serves different goals than other collector cars, so intended use matters. A restoration-oriented car may lean toward a classic whitewall radial, while a regularly driven vehicle may call for a plainer presentation. Matching the tire to the vehicle's purpose usually leads to a better decision than choosing by size alone.
What sidewall styles are available for 1979 Checker Marathon & Taxi tires?
The 1979 Checker Marathon & Taxi has meaningful sidewall variety in both primary sizes. Available options include narrow whitewall and wide whitewall styles, and 215/75R15 also includes an RBL all-terrain option. That gives owners room to choose between a restrained service-car look and a more traditional full-size American presentation.
Sidewall appearance can change the character of the car almost as much as the wheel itself. A narrow whitewall tends to look understated and practical, while a wider whitewall brings a more restoration-oriented visual effect. The best choice depends on how the vehicle is being finished rather than on fitment alone.
What brands offer tires for the 1979 Checker Marathon & Taxi?
Tires for the 1979 Checker Marathon & Taxi are available from BFGoodrich, Coker Classic, American Classic, Maxxis, Tornel, and Travelstar. Brand availability varies by size, with 215/75R15 offering the broadest selection and 225/75R15 still covering several traditional whitewall radial choices.
Brand is only one part of the decision, since the more useful comparison often comes from tire series, sidewall treatment, and wheel-width range. It helps to narrow the correct size first and then compare each brand's available presentation and specifications within that size rather than treating all options as interchangeable.
Restoration & Appearance
Which tire should I choose for a period-style 1979 Checker Marathon & Taxi?
A period-style 1979 Checker Marathon & Taxi usually starts with the correct primary radial size for the exact sub-model, then narrows the choice by sidewall treatment. In this application, both 215/75R15 and 225/75R15 offer traditional whitewall options, which makes it possible to preserve the car's full-size late-1970s character without moving away from the proper fitment range.
The visual result depends heavily on whitewall width and overall tire presence on the wheel. A broader whitewall generally gives a more formal, restoration-oriented look, while a narrower one feels more utilitarian. When exact originality matters, compare your choice against marque references and photos of similarly equipped cars before committing.
How does tire construction affect the appearance of a restored 1979 Checker Marathon & Taxi?
On the 1979 Checker Marathon & Taxi, the primary fitments are already radial, so construction changes are less about bias-ply versus radial appearance and more about the specific style of radial you choose. The strongest visual difference comes from sidewall treatment, especially the contrast between narrow whitewall, wide whitewall, and a plainer utility-focused sidewall.
That makes the tire's profile and presentation especially important on a large, upright body design like the Checker. A traditional whitewall radial tends to support a restoration-minded look, while an all-terrain or more modern utility style changes the car's visual tone. Appearance should be considered alongside wheel compatibility and intended use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1979 Checker Marathon & Taxi?
Yes. Even though the 1979 Checker Marathon & Taxi uses 15-inch radial fitments, modifications can change how well a tire works on the car. Aftermarket wheels, different wheel widths, altered ride height, suspension changes, or body repairs can all influence whether 215/75R15 or 225/75R15 is the more suitable choice.
A car that has spent years in fleet service or private ownership may no longer match its original setup. Checking wheel width, steering clearance, and fender room before installing new tires helps avoid choosing a size simply because it is associated with the model rather than with the actual vehicle in front of you.
What should I inspect before driving a 1979 Checker Marathon & Taxi on new tires?
Before putting a 1979 Checker Marathon & Taxi back on the road, inspect the wheels for damage, confirm the rim diameter and width, and make sure the new tires match the intended fitment. It is also worth checking for suspension wear, alignment issues, and any body or steering interference that could affect clearance once the car is moving.
Tire condition is only part of road readiness on a heavy, full-size collector vehicle. Air pressure should be set correctly for the tire being used, and the car should be checked for vibration, pulling, or unusual contact on the first drive. Catching those issues early is easier than correcting tire wear later.
How should 215/75R15 or 225/75R15 tires on a collector 1979 Checker Marathon & Taxi be maintained?
Collector-car tires on a 1979 Checker Marathon & Taxi should be checked regularly for air loss, sidewall cracking, cuts, bulges, and uneven tread wear. Because many Checkers spend long periods parked, the tires also deserve visual inspection for flat spotting and age-related deterioration even when tread depth still looks usable.
Storage conditions matter as much as mileage on a low-use vehicle. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources can help preserve the tires, and occasional movement helps reduce stress from sitting in one position. A brief inspection before each outing is a smart habit on any seldom-driven Checker.
