Willys 40 Series Tires

The listed tire size for the Willys 40 Series is 550-16, and it applies to 1940 models in this range. All available products for that size use a 16-inch rim, and the listed construction is bias ply. Where rim width is given, the range is 3.25 to 4.00 inches.

That makes the first job fairly simple: confirm that the car still has 16-inch wheels and has not been changed to a later or custom wheel package. Once wheel diameter is confirmed, the remaining choice is usually between period-style blackwall and wide whitewall appearance, along with selecting the brand and series that best match the intended restoration style.

On a Willys 40 Series, 550-16 is a numeric bias-ply tire size. The 550 portion represents a nominal section width of about 5.50 inches, while the 16 indicates the wheel diameter in inches. In the available listings for Willys 40 Series, that size is supplied as a bias-ply construction for a 16-inch rim.

Modern buyers sometimes assume every older size works like a current metric radial, but this older numeric format is much simpler and more period-specific. Matching the size code alone is not enough on a restored car, so it also helps to verify the wheel diameter stamped on the rim and check that the wheel width falls within the published range where one is listed.

Yes, the Willys 40 Series should be treated as a tube-type application with the listed 550-16 bias-ply tires. Every available product in this size for Willys 40 Series is a bias-ply design, and older numeric bias-ply fitments like this require a tube. That is consistent with the period construction used on 1940 passenger cars.

Tube selection should match both the tire size and the wheel being used, especially on a collector car that may still carry original-style rims. If the car has been rebuilt, repainted, or stored for years, inspect the wheel condition and valve hole area before mounting new tires so the tube and flap arrangement, if needed, starts with a sound foundation.

For a 1940 Willys 40 Series, the listed size is 550-16 on a 16-inch rim. Because only one size is shown for this production range, the main fitment checks are wheel diameter, wheel width, and whether the car still retains its period-style wheel setup. The available tires are bias-ply products in that one size.

A practical way to verify fitment is to read the size on any existing tire, measure or confirm the wheel diameter directly, and compare the wheel width to the listed range when available. That matters especially on cars that have seen decades of repairs, swaps, or hot rod modifications, where the body may be original but the rolling stock may not be.

Willys 40 Series tires are available in both blackwall and wide whitewall styles in 550-16. The product range includes blackwall options from Excelsior, Avon, BFGoodrich, and Firestone, plus wide whitewall options from BFGoodrich and Firestone. All of them are bias-ply constructions sized for 16-inch wheels.

Blackwall tires usually suit a more restrained factory-style look, while wide whitewalls can better match a dressier restoration theme or a period custom presentation. The right choice depends less on mechanical fitment than on how the specific Willys 40 Series is being restored, shown, or styled, so many owners decide this after reviewing photos or factory literature for their preferred appearance.

Four brands are represented for Willys 40 Series tires in 550-16: Excelsior, Avon, BFGoodrich, and Firestone. The listed series include Excelsior Bias Ply, Tourist Crossply, Silvertown Classic Bias Ply, and Firestone Classic Bias Ply. All are offered in bias-ply construction for the same 16-inch fitment.

That variety gives a buyer room to balance period look, sidewall style, and brand preference without changing the basic size. When comparing brands, it helps to look beyond the name alone and consider whether the goal is a traditional blackwall driver, a more formal wide-white presentation, or a specific brand family that suits the rest of the restoration.

The Willys 40 Series is offered in several series names within the 550-16 size, including Excelsior Bias Ply, Avon Tourist Crossply, BFGoodrich Silvertown Classic Bias Ply, and Firestone Classic Bias Ply. All of them are bias-ply or crossply type constructions sized for 16-inch wheels, so the main differences here are brand family, sidewall presentation, and the specific product line rather than a change from bias to radial technology.

For most Willys 40 Series owners, that means the selection process is more about restoration character than about a major engineering change in construction. A blackwall crossply tire can support a straightforward stock look, while whitewall versions from BFGoodrich or Firestone may better suit a more upscale visual finish on a fully restored car.

A Willys 40 Series should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, welders, ozone sources, and petroleum contamination. Bias-ply tires benefit from being kept clean and properly inflated during storage, because long periods at low pressure can encourage flat spotting and unnecessary sidewall strain.

If the Willys 40 Series will sit for months at a time, move it periodically or support it in a way that reduces constant load on one section of the tire. Collector cars also benefit from a quick visual inspection after storage, since aging, cracking, and bead-area issues can develop slowly even when the car sees very little mileage.

Tires on a Willys 40 Series should be inspected before regular driving and again after any long storage period. On a collector car with bias-ply tires, owners should watch for cracking, cuts, bulges, irregular wear, tread separation, and valve stem issues, along with checking that inflation remains appropriate for the tire and vehicle use.

A good routine is to make tire inspection part of every garage departure rather than relying on mileage intervals alone. Because collector cars are often driven infrequently, deterioration can come from age, environment, and storage conditions more than from tread wear, so a careful walkaround matters every bit as much as the condition of the rest of the chassis.

Tires on a Willys 40 Series should be replaced when age, cracking, hardening, sidewall damage, or structural deterioration appears, even if the tread still looks usable. Collector-car tires often age out before they wear out, and that is especially important on bias-ply applications where low annual mileage can disguise how old the casing really is.

Tread depth alone is not a reliable guide on a lightly used prewar-era style fitment. If the car has been stored for years, has unknown tire age, or shows any visible degradation, replacement is the prudent path, followed by a check of the wheels, tubes, and valve stems so the fresh installation starts with compatible supporting components.

The listed original-style fitment range for Willys 40 Series points to 550-16 sizing for 1940, with available replacement tires offered in bias-ply construction. Several series are available in that size, including Excelsior Bias Ply, Avon Tourist Crossply, BFGoodrich Silvertown Classic Bias Ply, and Firestone Classic Bias Ply. Those options reflect period-appropriate construction for the model range.

If a restoration is aimed at factory accuracy, the size is the first point to lock down, followed by sidewall style and brand preference. Owners pursuing strict authenticity should compare the car against original manuals, period photography, or marque-club guidance, since visual details such as blackwall versus whitewall presentation can affect how faithfully the finished Willys 40 Series represents its intended era.

Correct tire fitment can absolutely affect both the appearance and judged credibility of a Willys 40 Series. Judges and knowledgeable buyers often notice whether the tire size, construction type, stance, and sidewall treatment suit the year and character of the car. A 550-16 bias-ply fitment keeps the presentation aligned with the period represented by the 1940 Willys 40 Series.

That does not mean every restored car must wear the same sidewall style, but it does mean obvious deviations can change how authentic the car appears. If the Willys 40 Series is being prepared for formal judging, it is wise to review club standards and period references early so the chosen tire complements the restoration rather than becoming a visible mismatch.

Willys 40 Series tires in 550-16 are available with both blackwall and wide whitewall sidewall styles. Either can be visually appropriate depending on how the specific car is being restored and presented, since both styles existed in the period and both are offered here in bias-ply construction. The mechanical fitment remains the same because the size and wheel diameter do not change.

Blackwall usually gives a more understated, workmanlike look, while wide whitewall creates a dressier appearance that some restorers prefer on a fully finished car. The best choice comes from matching the tire to the trim level, wheel finish, and historical photos or literature associated with the individual Willys 40 Series being restored.

A properly fitted, correctly installed 550-16 bias-ply tire can be suitable for public-road use on a Willys 40 Series when the entire car is mechanically sound. Tire safety on a collector car depends on more than tread alone, including age, storage history, wheel condition, tube condition, inflation, alignment, brakes, and steering integrity. The available tires are built in the correct period-style construction rather than as modern radial replacements.

That means road use should match the capabilities of both the tire design and the vehicle itself. A Willys 40 Series in good condition can be driven and enjoyed, but it should be approached as a prewar-era collector car, with conservative speeds, sensible following distances, and regular inspection rather than being treated like a modern highway commuter.

Before driving a Willys 40 Series, check tire inflation, sidewall condition, visible cracking, tread security, valve stems, and any signs of tube-related air loss. It is also wise to inspect the wheel rims for rust, distortion, or bead-seat damage, since the listed 550-16 tires depend on a sound 16-inch wheel for proper service. Because the available fitments are bias-ply, even minor irregularities in inflation or alignment deserve attention.

A useful pre-drive routine also includes looking over the steering, brakes, and suspension, especially if the car has been parked for long periods. Many problems on collector cars reveal themselves in the first few miles, so a short local test drive after maintenance or storage is a smarter first step than heading straight into faster traffic.

A Willys 40 Series running period-style 550-16 bias-ply tires should be driven at moderate, sensible speeds that respect both the tire design and the car's 1940-era chassis, steering, and braking characteristics. Even when the tires are new, bias-ply construction does not behave like a modern radial at sustained highway speeds, and the rest of the vehicle plays just as large a role in safe road manners.

In practice, owners should let road conditions, weather, traffic, and the condition of the individual car set the pace rather than assuming modern cruising speeds are appropriate. If the Willys 40 Series feels unsettled, wanders, or reacts strongly to road crown, slow down and inspect the car, because those symptoms often point to setup or mechanical issues that need attention.