The 1928 Franklin Airman comes from a distinctive American era when engineering individuality still shaped the driving experience, and Franklin’s air-cooled approach set it apart from many of its contemporaries. For owners of a surviving Airman, tire selection is closely tied to preserving the car’s stance, wheel fitment, and authentic pre-war character on the road. This model uses bias-ply fitments in 30X5.77 and 30x5 on 7-inch rims, so the first step is confirming which wheel and tire style the car carries today. The choice here is less about modern alternatives and more about matching the proper antique tire format to the vehicle’s existing setup and restoration goals.
Which Tire Size Is Right for The 1928 Franklin Airman
The 1928 Franklin Airman uses two primary tire sizes, and both are bias-ply fitments tied to the same 7-inch rim diameter. The key decision is identifying whether the car is set up for 30X5.77 flotation-style tires or 30x5 antique beaded-edge-style tires before choosing a replacement, since the two sizes represent different vintage tire formats rather than interchangeable modern-style options.
The 30X5.77 size reads as an antique diameter-by-section format, with the first number indicating an approximate 30-inch overall tire diameter and the second indicating an approximate 5.77-inch section width. It is a bias-ply flotation or light-truck-style fitment used on the 1928 Franklin Airman, which makes construction and wheel compatibility more important than simply matching outside appearance. This type of sizing suits owners trying to maintain the proper visual proportions of the car while staying within a true vintage tire format. The practical step is confirming the existing wheel and bead type before selecting a tire in this size.
The 30x5 size is also an antique diameter-by-section format, meaning the tire is identified by an approximate 30-inch outside diameter and a 5-inch section width. On the 1928 Franklin Airman, this is a bias-ply antique inch beaded-edge-style fitment, which places the emphasis on correct wheel style and tire construction rather than modern sizing conventions. That makes it especially relevant for restoration-oriented owners who want to preserve an early motoring presentation. Before choosing this size, inspect the wheel setup carefully so the tire type matches the actual rim and bead configuration on the car.
Sub-model fitment is straightforward here because the covered Airman sub-model uses the same two primary tire sizes. Even so, checking the car’s actual wheel and tire setup still matters, since the two fitments reflect different antique tire styles.
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1928 Franklin Airman 6 Cyl.
The 1928 Franklin Airman 6 Cyl. uses the same two bias-ply tire sizes found on the model core, so the main fitment question is not trim level but which antique tire format is on the car. Tire selection should focus on matching the existing wheel type and maintaining the vehicle’s intended period-style stance and presentation.
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.
Frequently Asked Questions
Owners of a 1928 Franklin Airman usually need help sorting out antique tire sizing, 7-inch rim fitment, restoration-minded choices, and the checks that matter before putting a pre-war car back on the road.
Tire Size & Fitment
What tire size fits a 1928 Franklin Airman?
The 1928 Franklin Airman uses two primary tire sizes: 30X5.77 and 30x5. Both are bias-ply fitments, and the covered Airman 6 Cyl. sub-model uses these same sizes, so the fitment question centers on which antique tire format matches the car’s present wheel setup.
Those two sizes should not be treated as casual substitutes for one another. A Franklin that carries a flotation-style setup may call for 30X5.77, while a car with a beaded-edge-style arrangement may require 30x5, so wheel design, bead type, and overall compatibility should be checked before ordering replacement tires.
What size rim does a 1928 Franklin Airman use?
The 1928 Franklin Airman uses a 7-inch rim diameter with its primary tire fitments. That rim diameter is associated with the 30X5.77 tire size, and the vehicle summary also places the Airman’s tire fitment on a 7-inch rim overall.
Rim diameter is only part of the fitment picture on a car from this era. Antique tires also depend on the wheel’s bead style and overall configuration, so a 7-inch measurement alone does not settle the choice between 30X5.77 and 30x5 if the car has been changed, restored, or fitted with different wheels over time.
Do all 1928 Franklin Airman sub-models use the same tire size?
The covered 1928 Franklin Airman 6 Cyl. uses the same two tire sizes as the model core: 30X5.77 and 30x5. That means sub-model fitment is consistent within the Airman coverage here, rather than splitting into different sizes by trim or configuration.
Even with shared fitment at the sub-model level, the owner still needs to confirm the car’s actual wheel and tire arrangement. On pre-war vehicles, decades of maintenance and restoration work can leave one example on a different setup than another, so the correct tire is the one that matches the wheel type currently on the car.
Choosing the Right Tire
What should I consider when choosing a 30X5.77 tire for a 1928 Franklin Airman?
A 30X5.77 tire for a 1928 Franklin Airman should be chosen with the tire’s antique format, bias-ply construction, and 7-inch rim compatibility in mind. This size is tied to a flotation-style vintage fitment, so the goal is to match the car’s existing wheel setup rather than treating it like a modern light-truck size.
The most important checks are the wheel’s actual diameter, bead configuration, and the overall condition of the rim itself. A restoration-focused owner may also care about preserving the Airman’s original visual character, so the right choice is the one that supports both the car’s road use and its period-style presentation.
What should I consider when choosing a 30x5 tire for a 1928 Franklin Airman?
A 30x5 tire for a 1928 Franklin Airman should be evaluated as an antique diameter-by-section bias-ply size with a beaded-edge-style application. That makes it a specialty fitment where wheel type matters just as much as the size marking on the sidewall.
The practical step is to confirm that the Airman actually carries the wheel and bead arrangement intended for a 30x5 tire before replacing anything. Owners restoring the car for show or period-style driving often prefer to keep that earlier tire presentation intact, while road-use buyers still need to inspect the wheels closely before mounting new rubber.
How do I choose between the available tire formats for a 1928 Franklin Airman?
Choosing between the Airman’s tire formats starts with identifying whether the car is equipped for 30X5.77 or 30x5. Both are bias-ply sizes, but they represent different antique tire styles, so the deciding factor is the wheel and bead setup already on the vehicle.
That means the best approach is to inspect the existing tires, verify the wheel diameter, and look closely at how the tire seats to the rim. A Franklin that has been restored long ago or altered during its life may not match assumptions, and selecting by appearance alone can lead to an expensive mismatch.
Restoration & Appearance
Which tire should I choose for a period-style 1928 Franklin Airman?
A period-style 1928 Franklin Airman should stay with one of its proper bias-ply fitments, either 30X5.77 or 30x5, depending on the wheel setup on the car. Both sizes preserve the antique sizing language and overall visual character that suit a late-1920s Franklin.
The right choice depends on whether the vehicle is configured for a flotation-style tire or a beaded-edge-style tire. Owners pursuing stricter historical accuracy should compare the car against marque references, restoration records, or surviving original details so the tire format supports the vehicle’s intended era-appropriate presentation.
Does correct tire fitment matter for a 1928 Franklin Airman restoration?
Correct tire fitment matters a great deal on a 1928 Franklin Airman because the tire size affects not only roadworthiness, but also the car’s stance, wheel relationship, and visual authenticity. On a vehicle from this period, the difference between 30X5.77 and 30x5 is more significant than a simple sidewall label change.
A restoration can look noticeably off if the tire format does not match the wheel style or the car’s intended presentation. Beyond appearance, proper fitment also helps avoid mounting issues and clearance concerns, so confirming the wheel design and matching the tire type to it should be part of any serious restoration plan.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1928 Franklin Airman?
Yes, modifications can affect tire fitment on a 1928 Franklin Airman, especially if the car has had wheel changes, brake work, suspension repairs, or other restoration-era substitutions. Even when the intended tire size remains 30X5.77 or 30x5, the actual wheel configuration may no longer match the original style.
A buyer or owner should verify wheel diameter, bead type, and physical clearance at the fenders and steering components before installing new tires. Small differences in an antique car’s setup can matter more than expected, particularly when a vehicle has been rebuilt over decades by different owners with different restoration priorities.
What should I inspect before driving a 1928 Franklin Airman on new tires?
Before driving a 1928 Franklin Airman on new tires, inspect the wheels for damage, corrosion, cracks, and proper seating surfaces, then confirm that the mounted size matches the car’s intended setup. It also helps to check wheel hardware, steering movement, and visible clearance around the fenders and suspension.
A pre-war car deserves a slower, more deliberate road-readiness check than a modern driver. Tire pressure, secure mounting, even wear, and the condition of related chassis components all matter, because fresh tires cannot compensate for loose steering parts, weak suspension pieces, or wheels that are not in sound serviceable condition.
How should 30X5.77 or 30x5 tires on a collector 1928 Franklin Airman be maintained?
Collector-car tires on a 1928 Franklin Airman should be kept properly inflated, inspected regularly for cuts, cracking, bulges, and air loss, and protected from long exposure to heat, sunlight, and ozone. Because these are antique-format bias-ply tires, visual inspection is an important part of routine ownership.
Cars that spend long periods parked need extra attention before returning to the road. Looking over tread condition, sidewalls, wheel integrity, and the way the tire is seated on the rim can help catch age-related problems early, especially on a seldom-driven Franklin that may appear sound until it is put back into service.
