The 1928 Willys-Knight 70A Series comes from an era when smooth, refined motoring mattered as much as style, and that makes tire choice especially important today. A car of this vintage looks and feels right when its tire proportions match its upright pre-war stance and 19-inch wheel fitment. For this Willys-Knight, the primary fitment centers on bias-ply tires in 31X6.00 and 600-19 sizing, both tied to traditional period construction. Available choices lean toward restoration-oriented presentation, including a wide whitewall treatment in 600-19. The real decision is confirming which of these period size conventions matches the car's wheels and restoration goals before putting it back on the road.
Which Tire Size Is Right for The 1928 Willys-Knight 70A Series
The 1928 Willys-Knight 70A Series uses two primary tire sizes, and both are bias-ply fitments tied to 19-inch wheel use. Because more than one size applies to this model, the first step is confirming the exact wheel setup on the car and then choosing the size convention that matches it. Once that is settled, the decision becomes one of period appearance, restoration direction, and the available tire style within the correct size.
31X6.00 is an antique diameter-by-section size, meaning the first number refers to an approximate overall tire diameter of 31 inches and the second number refers to an approximate 6.00-inch section width. It is a bias-ply fitment that suits the traditional driving character and visual proportions expected on a late-1920s automobile such as the 1928 Willys-Knight 70A Series. This format is especially familiar on early vehicles where modern sizing language does not tell the full story. It is worth considering when maintaining an authentic pre-war look and verifying that the wheel and overall tire profile remain consistent with the car's current setup.
600-19 is a numeric bias-ply size in which the 600 designates a nominal 6.00-inch section width and the 19 identifies the rim diameter in inches. On the 1928 Willys-Knight 70A Series, it represents a traditional vintage fitment built around 19-inch wheels and period-style construction. Available choices in this size include Lester tires in the Lester Classic Bias Ply series with a wide whitewall sidewall treatment, giving the buyer an appearance decision as well as a fitment decision. This size deserves close attention when the goal is a restoration-oriented tire presentation that complements a classic late-1920s luxury car.
Sub-model fitment is straightforward here because the covered 1928 Willys-Knight 70A Series sub-model uses the same two primary bias-ply tire sizes. Checking the exact sub-model still matters so the wheel setup and chosen size convention stay aligned with the car you are working on.
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1928 Willys-Knight 70A Series 6 Cyl.
The 1928 Willys-Knight 70A Series 6 Cyl. uses the same two primary bias-ply tire sizes associated with this model line, so the main fitment question is not trim variation but wheel confirmation. That makes tire selection more about choosing the correct vintage size convention and deciding how closely the finished car should follow a traditional restoration-oriented appearance.
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 1928 Willys-Knight 70A Series Tires for Sale
Available 1928 Willys-Knight 70A Series tire choices focus on 600-19 bias-ply fitment, including Lester options in the Lester Classic Bias Ply series with a wide whitewall sidewall. That gives the product grid a clear restoration-oriented emphasis rather than a broad mix of constructions or modern styles.
These 1928 Willys-Knight 70A Series tire FAQs focus on vintage size interpretation, 19-inch wheel fitment, product selection, restoration appearance, and the checks that matter before returning a pre-war car to regular road use.
Tire Size & Fitment
What tire size fits a 1928 Willys-Knight 70A Series?
The 1928 Willys-Knight 70A Series uses two primary bias-ply tire sizes: 31X6.00 and 600-19. Those are both vintage fitments, but they express size in different ways. One uses an antique diameter-by-section convention, while the other uses a numeric bias-ply convention tied directly to a 19-inch rim.
The practical step is confirming which size convention matches the wheels and existing setup on the car. A late-1920s vehicle may have been restored, re-wheeled, or otherwise changed over time, so the safest path is to verify the actual rim diameter and compare the tire currently fitted before choosing a replacement.
What size rim does a 1928 Willys-Knight 70A Series use?
The 1928 Willys-Knight 70A Series uses a 19-inch rim with its 600-19 tire fitment, and the model's covered tire sizes are grouped around 19-inch wheel use. That rim diameter is central to choosing the correct vintage tire because a collector car of this era depends heavily on matching tire proportion to wheel size.
Wheel diameter should be checked on the car rather than assumed from age alone, especially if the car has been restored or modified in the past. Measuring the wheel and confirming the existing tire markings helps prevent ordering a vintage size that matches the model family but not the actual wheels currently on the vehicle.
Does the 1928 Willys-Knight 70A Series 6 Cyl. use the same tire size?
Yes. The 1928 Willys-Knight 70A Series 6 Cyl. uses the same two primary bias-ply tire sizes associated with this model core: 31X6.00 and 600-19. That means the fitment question is consistent within the covered sub-model rather than changing between multiple trim-specific tire setups.
Even with shared fitment, the choice still needs to match the car's actual wheel and restoration configuration. A buyer should confirm whether the car is set up around the antique diameter-by-section marking or the numeric 600-19 convention, then choose a tire that supports the intended appearance and road-use expectations.
Choosing the Right Tire
What should I consider when choosing a 600-19 tire for a 1928 Willys-Knight 70A Series?
Start with the correct size, construction, and wheel diameter. On this Willys-Knight, 600-19 is a bias-ply vintage tire size for a 19-inch rim, so the tire should suit the car's wheel setup and the kind of presentation you want, whether that is preservation, restoration, or regular collector-car driving.
Beyond size, compare details that affect how the finished car looks and how the tire matches the project. Sidewall treatment, tire series, and other product characteristics can matter as much as the size itself on a pre-war car. Condition of the wheels and the intended road use should also guide the final choice.
What sidewall styles are available for 1928 Willys-Knight 70A Series tires?
Available 1928 Willys-Knight 70A Series product coverage includes a wide whitewall sidewall style in 600-19. On a car from 1928, sidewall treatment plays a major role in the finished appearance because the tire occupies a large visual space and strongly influences how formal or understated the car looks.
The right sidewall choice depends on the direction of the restoration and the character you want the car to present. A wide whitewall creates a distinctly period-style visual statement, but it is still wise to compare that appearance against the car's trim, paint, and historical references before settling on one look.
What tire series are available for the 1928 Willys-Knight 70A Series?
The available product assortment for the 1928 Willys-Knight 70A Series includes the Lester Classic Bias Ply series in 600-19. That places the emphasis on a traditional bias-ply construction and a restoration-oriented look rather than a modern radial-style interpretation of the vehicle's tire fitment.
Series names matter because they often signal the tire's overall visual character and intended vintage presentation. For a car such as the Willys-Knight, choosing a tire series is less about chasing novelty and more about making sure the tread, sidewall style, and overall impression suit a late-1920s automobile.
Restoration & Appearance
Which tire should I choose for a period-style 1928 Willys-Knight 70A Series?
A period-style 1928 Willys-Knight 70A Series should begin with one of its proper bias-ply sizes, either 31X6.00 or 600-19, depending on the wheel setup and size convention used on the car. Keeping the correct vintage sizing language and bias-ply construction helps preserve the tall, formal look expected on a late-1920s automobile.
Once the size is settled, the appearance decision becomes more specific. A 600-19 wide whitewall offers a strong restoration-oriented presentation, but exact originality can vary from car to car. When that level of accuracy matters, compare the chosen tire style against marque references, period photography, and vehicle-specific documentation.
Does correct tire fitment matter for a 1928 Willys-Knight 70A Series restoration?
Yes, correct tire fitment matters greatly on a 1928 Willys-Knight 70A Series restoration. Tires on cars of this era are a major visual element, and the wrong size or construction can change the stance, side profile, and overall authenticity of the finished vehicle even before the car is driven.
Fitment also affects practicality. A tire that does not match the wheel diameter or the intended vintage proportion can create unnecessary problems during mounting or use. Taking time to confirm the proper size convention, wheel condition, and appearance goal usually leads to a result that looks right and behaves more predictably.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1928 Willys-Knight 70A Series?
Yes, modifications can affect tire fitment on a 1928 Willys-Knight 70A Series. Even though the vehicle uses traditional bias-ply sizes, changes such as different wheels, altered ride height, brake conversions, or body repairs can influence which tire size works with the car's actual clearance and mounting requirements.
A collector car that has changed hands many times may not still match its earlier configuration, so inspection matters. Check wheel diameter, wheel width, tire-to-fender clearance, and steering clearance before committing to a replacement. That is especially important when choosing between two vintage size conventions that both belong to the model.
What should I inspect before driving a 1928 Willys-Knight 70A Series on new tires?
Before driving a 1928 Willys-Knight 70A Series on new tires, inspect the wheels, valve hardware, mounting condition, and the visible clearance around the suspension and fenders. A pre-war car should also be checked for loose steering components, brake condition, and any signs that the tires do not sit squarely on the rims.
After installation, recheck air retention and look closely for rubbing during slow steering movement and initial short drives. It also helps to inspect the older parts around the tires, since worn bushings, sagging springs, or damaged wheels can affect how a new set behaves even when the tire size itself is correct.
How should 600-19 tires on a collector 1928 Willys-Knight 70A Series be maintained?
600-19 tires on a collector 1928 Willys-Knight 70A Series should be kept clean, properly inflated, and inspected regularly for cracking, cuts, bulges, and air loss. Because collector vehicles often sit for long periods, age and storage conditions can become just as important as tread wear in judging the tire's condition.
Storage habits make a real difference on a low-use pre-war car. Keeping the Willys-Knight away from prolonged sunlight, moisture, and ozone sources helps preserve the sidewalls, and periodic movement can reduce prolonged flat spotting. Before any longer drive, inspect the tires again and confirm that the wheels and mounting hardware remain secure.
