The 1927 Erskine represented Studebaker’s effort to offer a compact, stylish car in the busy late-1920s market, giving buyers an affordable entry into a well-established American make. Cars from this period sat right at the transition point between earlier high-profile tire sizing conventions and the more familiar numeric bias-ply system that followed. For 1927 Erskine, one model uses two tire sizes, and the real question is not model-to-model fitment but whether your car is set up for the earlier 28X4.40 designation or the later 4.40-20 numeric bias-ply equivalent. Before choosing a tire, confirm the size marking your wheels and current tires were intended to use.
Which Tire Size Is Right for Your 1927 Erskine
Two tire sizes are available for 1927 Erskine, and both are used on the same model rather than being split across a broader model range. The key decision is confirming which sizing convention your car is set up for, since both choices are bias-ply tires but they identify dimensions in different ways. Understanding that distinction first makes it much easier to choose the right tire for your wheels and restoration goals.
Year(s): 1927|Fit(s): 50 Series|Construction: Bias Ply|Rim: 20-in rim
28X4.40 is an antique diameter-by-section size, with 28 indicating overall tire diameter in inches and 4.40 indicating nominal section width, built as a bias-ply tire for a 20-inch wheel. This size is used on the 1927 Erskine 50 Series and carries the earlier style of sizing typical of mid-1920s cars. It is the right direction for an owner who wants the period-correct pre-war look and sizing language that matches the era of the car.
Year(s): 1927|Fit(s): 50 Series|Construction: Bias Ply|Rim: 20-in rim
4.40-20 is a numeric bias-ply size, with 4.40 representing nominal section width in inches and 20 representing wheel diameter in inches. This size is also specific to the 1927 Erskine 50 Series and reflects the sizing system that became more familiar as the industry moved away from earlier diameter-first designations. It is a practical choice when your car, wheel markings, or existing tire setup already references the later numeric convention.
Both sizes use a 20-inch rim, so the main step is confirming the intended size designation before matching the tire to the wheel.
1927 Erskine Models
One model is covered for 1927 Erskine. Tire choice does not vary by body line within the make here, but the 50 Series appears with two different bias-ply size designations, so identifying the size your car is meant to use matters more than simply knowing the year and make. Select the model below to explore model-specific fitment history and the tire options that apply to it.
1927 Erskine 50 Series
The 1927 Erskine 50 Series was positioned as a compact American car with upscale styling and a slightly sporting personality, aimed at buyers who wanted something distinct from the larger mainstream models of the day. Its tires mount on 20-inch wheels, and the fitment question centers on whether your car is using the antique 28X4.40 designation or the later 4.40-20 numeric bias-ply size. For a restoration-minded owner, that distinction can affect how authentic the finished car looks.
These FAQs focus on the two bias-ply sizing conventions used on 1927 Erskine cars, how to confirm the right 20-inch fitment for the 50 Series, and what to watch for when storing, inspecting, and driving a late-1920s collector car.
Size Basics & Fitment
What tire sizes fit 1927 Erskine vehicles?
1927 Erskine vehicles use two tire sizes: 28X4.40 and 4.40-20. Both apply to the 1927 Erskine 50 Series, and both are bias-ply tires that mount on 20-inch rims. The difference is the way the size is expressed, with one using the older overall-diameter-by-section format and the other using the more familiar numeric width-and-rim format.
That means a 1927 Erskine owner does not need to sort through multiple models, but does need to confirm which size convention belongs on the car. The best place to start is the wheel and any surviving tire markings, along with restoration records or marque references. Once the intended size is confirmed, choosing the right tire becomes much more straightforward.
What does 28X4.40 mean on a 1927 Erskine tire?
On a 1927 Erskine, 28X4.40 is an antique diameter-by-section size. The first number, 28, refers to the tire’s overall diameter in inches, while 4.40 refers to nominal section width in inches. That format predates the later numeric system and is typical of many cars from the middle and late 1920s.
Seeing 28X4.40 usually points to a more era-specific sizing style, which matters for an owner trying to keep a 1927 Erskine visually authentic. It does not change the fact that the tire is a bias-ply on a 20-inch rim, but it does affect how you match the tire to the wheel and to the car’s restoration standards. If originality matters, this marking is worth preserving.
What does 4.40-20 mean on a 1927 Erskine tire?
On a 1927 Erskine, 4.40-20 is a numeric bias-ply tire size. The 4.40 refers to nominal tire width in inches, and the 20 refers to wheel diameter in inches. This became the more recognizable American sizing pattern as tire labeling moved away from older overall-diameter-first markings.
For a 1927 Erskine owner, 4.40-20 can be the correct reference if the wheels, older service history, or prior replacement tires already use that numbering system. The important point is not to assume that every 20-inch vintage tire is interchangeable. Confirm the exact size your car is intended to use so the proportions and fit remain appropriate to the original setup.
Buying the Right Tire
Should I choose the 28X4.40 or the 4.40-20 for my 1927 Erskine?
A 1927 Erskine 50 Series appears with both 28X4.40 and 4.40-20, and both are bias-ply choices on 20-inch rims. The decision is not bias-ply versus radial here; it is confirming which sizing system your particular car, wheels, and restoration direction call for. One reflects an older diameter-by-section convention, while the other uses the later numeric width-and-rim convention.
If your goal is a highly faithful late-1920s presentation, the exact size marking can matter as much as the basic dimensions. If your car already has wheels or prior fitment history tied to one of these designations, follow that path rather than switching by guesswork. Matching the correct size notation helps keep proportions, stance, and authenticity aligned with the car’s period character.
What brands make tires for 1927 Erskine vehicles?
Tires are identified for 1927 Erskine in two sizes, 28X4.40 and 4.40-20, both in bias-ply construction for the 50 Series. Brand choice can depend on which of those two size conventions you are following, since antique-size and numeric-size offerings are not always grouped the same way. For a late-1920s American car, buyers usually focus on a brand’s vintage appearance, period sidewall treatment, and consistency with restoration goals.
A 1927 Erskine owner should narrow the search by size first and brand second. Once the correct size designation is settled, compare the available vintage-style options for sidewall appearance and overall presentation rather than treating every reproduction bias-ply tire as identical. That approach keeps the tire selection centered on fitment first and aesthetics second, which is the right order for a pre-war car.
What sidewall styles are available for 1927 Erskine tires?
A 1927 Erskine sits squarely in the pre-war era, so sidewall appearance matters almost as much as size when the car is being restored or shown. Vintage tires for cars of this period are often chosen to complement the car’s original visual character, whether that means a plainer blackwall look or a more decorative sidewall treatment suited to period presentation.
Sidewall choice should follow the standard you are building toward. A driver-focused 1927 Erskine may simply need the right size and a traditional bias-ply look, while a more exacting restoration may need the sidewall style to match period expectations for the market and event. If the car will be judged, compare your choice against period photos and club guidance before finalizing the tire.
Fitting & Setup
What rim width do 1927 Erskine tires require?
The two tire sizes used on 1927 Erskine, 28X4.40 and 4.40-20, both mount on 20-inch rims. Rim width still matters on a vintage car because wheel proportions affect how a bias-ply tire sits and how the car presents, but the key fitment detail at the year-make level is that both sizes share the same wheel diameter.
A 1927 Erskine owner should confirm the actual wheel dimensions before selecting a replacement tire, especially if the car has had wheels changed during its life. Pre-war wheels can vary in condition and history, and an apparently correct diameter does not automatically settle every fitment detail. Measuring the wheel and comparing it with the intended tire specification is the safest approach.
Do 1927 Erskine tires require inner tubes?
A 1927 Erskine uses bias-ply tires in 28X4.40 or 4.40-20, and cars of this era commonly relied on tube-type fitment because of their wheel design and tire construction. That makes inner tubes and proper flap or valve-stem compatibility an important part of the overall setup, not an afterthought.
Before mounting tires on a 1927 Erskine, inspect the wheels carefully and match the tube arrangement to the tire and rim style being used. Tube fitment affects air retention, valve alignment, and long-term reliability, especially on older wheels that may have seen decades of use. A pre-war car benefits from treating the wheel, tube, and tire as one complete system.
Can the original 1927 Erskine wheels be used with both tire sizes?
The original 1927 Erskine wheel setup can generally be compatible with both listed tire sizes because both 28X4.40 and 4.40-20 are 20-inch fitments. That shared diameter is the main reason the two size designations can both appear on the same 50 Series model without representing completely different wheel hardware.
Wheel diameter compatibility is only the first check, though. Original pre-war wheels should be inspected for width, condition, trueness, and suitability for the exact tire being mounted. If your 1927 Erskine has replacement rims or a long restoration history, verify the wheel itself before assuming either size will mount exactly the same way just because both use a 20-inch rim.
Maintenance, Storage & Longevity
How should I store a 1927 Erskine when the tires are fitted?
A 1927 Erskine should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age rubber. Because the car uses bias-ply tires, long static storage can encourage flat-spotting and accelerate sidewall weathering if the tires sit under load for extended periods.
Move the car occasionally to change the tire contact patch, keep inflation checked, and consider stands or partial load relief during long-term storage if the car will sit for months. Clean, dry floors and consistent temperatures also help. Good storage habits matter more on a lightly used 1927 Erskine than mileage does, because age and environment are usually the real tire enemies.
How long do tires on a 1927 Erskine typically last?
Tires on a 1927 Erskine should be judged primarily by age and condition rather than miles traveled. A collector car tire often deserves close evaluation once it reaches the five- to seven-year range, and many owners treat about ten years as a practical upper limit even if tread wear is minimal. The DOT date code on the tire helps establish age on modern reproduction tires.
That matters because a 1927 Erskine may spend much of its life indoors and still age out its tires before wearing them out. Sidewall cracking, hardening, loss of air retention, or changes in ride feel are signs to inspect more closely. A tire that looks acceptable at a glance can still be too old for confident road use on a vintage car.
How often should tires on a 1927 Erskine be inspected?
Tires on a 1927 Erskine should be inspected before every drive and again before any longer outing or tour. Look closely for sidewall cracking, cuts, bulges, uneven tread wear, and signs of air loss. On a pre-war setup, tube-related issues and valve-stem condition also deserve attention because they can affect reliability even when the tread itself looks fine.
Frequent inspection is especially important on a car that is driven occasionally rather than daily. A 1927 Erskine can sit long enough for pressure changes and age-related deterioration to develop quietly between outings. Making tire inspection part of the routine walk-around helps catch problems early, before they become a roadside issue or spoil a longer drive.
Restoration & Authenticity
What tires were originally fitted to the 1927 Erskine 50 Series?
The 1927 Erskine 50 Series belongs to a period when bias-ply construction was standard, and its listed fitments are 28X4.40 and 4.40-20. Those two sizes reflect the era’s transition in tire labeling rather than a move to a different modern construction type. For originality, the important point is staying with a proper bias-ply tire in the correct 20-inch fitment for the car.
Exact original fitment can vary with production timing, service replacement history, and market-specific practice, so a serious restoration should compare the car against factory literature, period photographs, and marque-club guidance. That extra step is worthwhile on a 1927 Erskine because an otherwise correct restoration can lose authenticity points if the tire size notation or period appearance is off.
Does correct tire fitment matter for showing a 1927 Erskine?
Correct tire fitment absolutely matters when a 1927 Erskine is judged for authenticity. On a pre-war car, judges and knowledgeable enthusiasts often notice whether the tire size, construction type, and overall sidewall appearance suit the year of the vehicle. A modern-looking substitute can change the car’s stance and visual balance even before anyone checks finer details.
For a show-oriented 1927 Erskine, matching the right bias-ply size convention is part of presenting the car honestly. The difference between 28X4.40 and 4.40-20 may seem small to a casual observer, but period-correct details often matter at higher restoration levels. Event standards vary, so owners aiming for concours-level accuracy should review the rules and ask marque specialists what is expected.
Why does tire sizing authenticity matter on a 1927 Erskine?
A 1927 Erskine comes from a period when tire proportions were a visible part of the car’s design. The right bias-ply size helps preserve the intended ride height, fender relationship, and overall profile, while the wrong size or wrong style can make the car look subtly off even if it physically mounts to the wheel.
Authenticity in tire sizing is not only about pleasing judges. It also helps keep the restored car visually coherent with the late-1920s engineering and styling language that made the Erskine distinctive in the first place. Owners who want the car to read correctly at a glance should treat tire size, sidewall style, and construction as finishing details that deserve careful attention.
Safety & Road Use
Are 1927 Erskine tires safe for highway driving?
1927 Erskine tires can be suitable for road use when they are the correct size, in sound condition, and properly mounted, but they are still bias-ply tires designed around pre-war vehicle dynamics. A late-1920s car places limits on touring speed that are often shaped as much by steering, brakes, suspension, and road manners as by the tire itself.
On modern roads, the smart approach is to drive a 1927 Erskine within the comfort zone of the whole vehicle rather than focusing only on whether the tires can physically roll at highway speed. Fresh, properly maintained tires are essential, but so is an honest understanding of the car’s age and engineering. Smooth inputs and conservative cruising are part of safe vintage driving.
What inflation pressure should I use for 1927 Erskine tires?
Inflation pressure for a 1927 Erskine should follow the recommendation for the exact tire size and product being used, along with any factory guidance available for the car. Because 28X4.40 and 4.40-20 are distinct vintage sizes, pressure should not be borrowed casually from another tire just because both mount on 20-inch rims.
Start with the tire maker’s guidance for the specific tire on the car, then compare that with period vehicle recommendations where available. Pressure affects ride quality, steering effort, tread wear, and casing stress on a bias-ply tire, so getting it right matters. A 1927 Erskine rewards careful setup, and a quick pressure check before each outing is one of the easiest habits to maintain.
What should I check before taking a 1927 Erskine on a longer drive?
Before a longer drive in a 1927 Erskine, inspect all tires for cracks, cuts, bulges, uneven wear, and proper inflation, and make sure the spare is serviceable as well. On a car of this age, valve stems, tube-related sealing, and wheel condition deserve as much attention as tread depth because failures often begin at the supporting components.
Tire inspection should be part of a broader pre-drive routine that also covers brakes, steering play, fluids, and general mechanical readiness. A well-prepared 1927 Erskine is far more enjoyable on the road than one that is merely running. Taking ten extra minutes before departure can prevent the kind of roadside interruption that is much harder to solve with a pre-war car.
