The 1927 Davis 92 Series comes from the late brass-and-vintage era, when wheel, tire, and chassis design still reflected early motoring practice more than modern standardization. Buyers restoring one today often encounter details that feel unfamiliar compared with later collector cars, especially around rim design and antique tire sizing. For this exact model, the primary fitment centers on two bias-ply choices, 30X5.77 and 30x5, both tied to a 7-inch rim context. That makes the real decision less about modern upgrading and more about matching the tire type to the wheel configuration and the kind of period-style presentation the car should retain. Careful wheel verification matters before any selection is made.
Which Tire Size Is Right for The 1927 Davis 92 Series
The 1927 Davis 92 Series uses two primary tire sizes, and choosing correctly starts with confirming the exact wheel and tire style already on the car. Both fitments are bias-ply, but they represent different sizing conventions, so the first step is identifying whether the vehicle is set up for 30X5.77 flotation-style fitment or 30x5 antique beaded-edge style before comparing tire choices.
30X5.77 is an antique-style size that uses overall tire diameter and approximate section width in inches rather than a later alphanumeric or metric system. On the 1927 Davis 92 Series, it is a bias-ply fitment with a 30-inch overall diameter and about 5.7 inches of section width, making it part of the period tire language owners encounter on very early vehicles. Its practical role is tied to vintage wheel and tire architecture, so it should be chosen only after confirming the wheel setup on the car. That check is especially important on restored vehicles with changed rims or mixed-era components.
30x5 is also an antique diameter-by-section size, with the first number indicating approximate outside diameter and the second indicating section width in inches. For the 1927 Davis 92 Series, this is a bias-ply fitment with the same nominal 30-inch diameter but a narrower 5-inch section than 30X5.77, so the two sizes should not be treated as interchangeable by assumption. This size is especially relevant for owners working with antique beaded-edge style wheel and tire arrangements. Verifying the wheel design and existing fitment is the key step before selecting this size for road use or restoration work.
Fitment on the covered 1927 Davis 92 Series sub-model is straightforward in name but still requires close attention because two primary tire sizes appear under the same application. Checking the exact wheel and tire setup matters more here than trim differences alone.
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1927 Davis 92 Series 6 Cyl.
The 1927 Davis 92 Series 6 Cyl. is associated with both 30X5.77 and 30x5 bias-ply tires, so the tire decision depends on confirming which wheel and tire configuration is actually on the car. That makes selection a matter of antique fitment verification rather than simply choosing by model name.
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 1927 Davis 92 Series usually need clarity on antique tire sizing, wheel compatibility, period-style selection, and what to inspect before putting an early car back on the road. These questions focus on exact fitment, construction, appearance, and safe road-use checks.
Tire Size & Fitment
What tire size fits a 1927 Davis 92 Series?
The 1927 Davis 92 Series uses two primary tire sizes: 30X5.77 and 30x5. Both are bias-ply fitments, and both belong to early tire sizing systems that differ from later alphanumeric and modern metric radial sizing.
The practical question is which setup is actually on the car, since these two sizes are not simply modern substitutes for one another. A careful check of the existing wheels, the current tire markings, and the tire type already fitted to the vehicle will help confirm which size belongs on a particular Davis before replacement.
What size rim does a 1927 Davis 92 Series use?
The 1927 Davis 92 Series is associated with a 7-inch rim diameter in its primary fitment information. That rim context is especially important because this vehicle uses antique bias-ply tire sizing rather than later passenger-car sizing conventions.
Rim diameter alone is not the whole story on a car of this age. Early vehicles can involve specialized wheel and tire designs, so the buyer should also confirm the actual wheel type on the car and make sure the selected tire matches that wheel configuration before mounting or road use.
What does 30x5 mean on a 1927 Davis 92 Series?
On a 1927 Davis 92 Series, 30x5 is an antique diameter-by-section size. The 30 refers to the tire's approximate overall diameter in inches, while the 5 refers to its approximate section width rather than the wheel diameter.
That matters because antique tire markings do not read the same way as later numeric bias-ply, alphanumeric, or metric radial sizes. A buyer seeing 30x5 should treat it as a period sizing format tied to an early wheel setup and verify the exact wheel design before assuming another 30-inch tire is equivalent.
Choosing the Right Tire
What should I consider when choosing a 30X5.77 tire for a 1927 Davis 92 Series?
Start by confirming that 30X5.77 is the tire size already matched to the car's wheel setup, since the 1927 Davis 92 Series is also associated with 30x5. The 30X5.77 size is a bias-ply antique fitment with a nominal 30-inch overall diameter and about 5.7 inches of section width.
Selection should center on wheel compatibility and preservation goals rather than modern replacement habits. On a vintage car like this, the safest approach is to inspect the current wheel type, compare the tire markings already in use, and make sure the chosen tire supports the appearance and operating style intended for the vehicle.
How do I choose between the available 1927 Davis 92 Series tire sizes?
Choosing between 30X5.77 and 30x5 begins with the wheel and tire arrangement on the individual car. Both sizes are correct-era bias-ply fitments for the 1927 Davis 92 Series, but they represent different antique sizing applications and should not be treated as casual substitutes.
The better choice is the one that matches the actual wheel design and existing fitment history of the vehicle. Many early cars have been restored, re-rimmed, or altered over time, so reading the current tire markings and confirming wheel details is more useful than selecting a size by appearance alone.
What rim-fitment details matter when choosing 1927 Davis 92 Series tires?
Rim diameter is the first checkpoint, and the 1927 Davis 92 Series is tied to a 7-inch rim diameter in its primary fitment information. Beyond diameter, early tire selection also depends on matching the tire to the correct wheel and tire style used on the car.
That is especially important with antique applications because a tire can share a similar outside diameter yet still be wrong for the wheel configuration. Careful buyers inspect the wheel construction, verify the current size markings, and avoid assuming that similar-looking early tires can be mounted interchangeably.
Restoration & Appearance
Which tire should I choose for a period-style 1927 Davis 92 Series?
A period-style 1927 Davis 92 Series should stay with the correct antique bias-ply format already matched to the car, which means choosing between 30X5.77 and 30x5 only after confirming the actual wheel setup. Both sizes suit the era, but they reflect different early fitment arrangements.
For a restoration-oriented result, the tire should support the vehicle's authentic visual proportions and proper wheel relationship rather than simply filling the fender opening. Buyers seeking exact originality should compare the car against marque references, restoration records, or long-held vehicle history before finalizing a tire size.
Does correct tire fitment matter for a 1927 Davis 92 Series restoration?
Correct tire fitment matters greatly on a 1927 Davis 92 Series because the car comes from an era when wheel and tire designs were much less standardized than later collector vehicles. Using the proper antique bias-ply size helps preserve both the car's stance and the way the wheel and tire assembly presents visually.
A mismatch can affect appearance quickly, even before road behavior is considered. Restorers should confirm whether the car belongs on 30X5.77 or 30x5 and make that decision from the actual wheel setup, especially if the vehicle has been restored more than once over its lifetime.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1927 Davis 92 Series?
Yes. Any change to wheels, hubs, suspension height, axle components, or body clearance can affect tire fitment on a 1927 Davis 92 Series. That matters even more on an early vehicle using antique bias-ply sizes, where the relationship between tire and wheel design is already specialized.
A Davis that has been restored or updated over the years may no longer match its original wheel arrangement. Before replacing tires, inspect the current rims, confirm the size markings already fitted, and check for clearance through steering travel and full suspension movement rather than relying on model name alone.
What should I inspect before driving a 1927 Davis 92 Series on new tires?
Inspect the wheels, valve areas, tire seating surfaces, and the overall condition of the suspension and steering components before driving a 1927 Davis 92 Series on new tires. On the tires themselves, check inflation, sidewall condition, tread integrity, and any signs of cuts, bulges, or uneven seating.
An early car places a premium on careful preparation because age-related wear in the chassis can affect how even a correctly sized bias-ply tire behaves. A slow test drive after installation, followed by another visual inspection, helps confirm that the tire is seated properly and clears the car as intended.
How should tires on a collector 1927 Davis 92 Series be maintained?
Tires on a collector 1927 Davis 92 Series should be maintained with regular pressure checks, periodic visual inspection, and careful storage habits. Even when mileage is low, antique and collector vehicles can develop tire issues from age, long stationary periods, sunlight, heat, and exposure to ozone sources.
Good maintenance also means checking for cracking, air loss, tread separation signs, and changes in how the car sits after storage. Moving the vehicle occasionally, keeping it on clean dry surfaces, and inspecting the tires before each road outing helps catch problems before they become more serious.
