1940 Willys Tire Fitment Guide

1940 Willys vehicles covered here use one tire size: 550-16. That size applies to the 1940 Willys 40 Series and mounts on a 16-inch rim. Available products for 550-16 are bias-ply tires, and where rim width is specified, the fitment range is 3.25 to 4.00 inches wide.

That makes the year-and-make picture much simpler than on many later collector cars, because the main decision is not choosing among several fitment sizes. Instead, owners of a 1940 Willys should focus on confirming the car is a 40 Series, verifying the actual wheel diameter and width on the car, and then choosing the sidewall look that best suits a stock restoration, touring driver, or period-style presentation.

On a 1940 Willys, 550-16 is a numeric bias-ply tire size. The 5.50 portion refers to the nominal section width in inches, written without a decimal in the code, and the 16 refers to the wheel diameter in inches. Because it is a bias-ply format, it reflects the construction and sizing conventions typical of prewar American cars.

Modern buyers sometimes expect a size code to spell out every dimension the way a metric radial does, but older numeric sizes are more traditional and less explicit. When replacing tires on a 1940 Willys, the useful takeaway is that 550-16 identifies the correct period-style fitment family, after which you still need to choose among available brands and sidewall styles that suit the car's appearance and intended use.

Yes. The 1940 Willys model covered here, the 40 Series, uses 550-16 tires throughout. There is no second size to sort through at the year-and-make level, so the fitment side of the decision is more straightforward than it is on many makes with multiple body lines or wheel diameters in the same year.

That consistency is useful if you are just beginning a restoration or sorting through a car with incomplete records. Once you confirm you are working with a 1940 Willys 40 Series, attention can shift away from comparing sizes and toward choosing the correct visual treatment, checking that the wheel dimensions are appropriate for the tire, and matching the overall look of the tire to the level of originality you want.

1940 Willys tires in 550-16 are available in both Blackwall and Wide Whitewall form. Excelsior and Avon offer blackwall choices in this size, while BFGoodrich and Firestone offer wide whitewall versions. All of them remain bias-ply tires, so the visual difference is the major distinction rather than a change in size or construction type.

For a 1940 Willys, blackwalls usually suit a more restrained factory-driver appearance, while wide whitewalls create a more dressed, show-oriented prewar presentation. The right choice depends on how your specific car is being restored and how it would have been trimmed and presented in its market. Owners seeking event-level authenticity should compare the tire's sidewall look with period photos and marque-club guidance before making a final decision.

Four brands currently cover 1940 Willys fitment in 550-16: Excelsior, Avon, BFGoodrich, and Firestone. Each offering in this fitment is a bias-ply tire, but the brand mix gives owners a useful spread of period-style options, from plain blackwall presentation to wide whitewall styling associated with more upscale restored finishes.

Brand choice on a 1940 Willys often comes down to the overall character you want the car to project rather than to a different fitment outcome. Some restorers prioritize a traditional American name on an American prewar car, while others focus more on tread style or sidewall appearance. Once the 550-16 size is confirmed, comparing the available brands by sidewall treatment and any listed load details is usually the most practical next step.

For a 1940 Willys in 550-16, both Firestone and BFGoodrich offerings are bias-ply tires with a wide whitewall sidewall style. The Firestone version is listed with a 2.50-inch whitewall, a rim width range of 3.25 to 4.00 inches, a weight of 19 pounds, and a maximum load figure of 840 pounds at 32 psi. The BFGoodrich version is listed with a 2.25-inch whitewall and a weight of 16 pounds.

That means the visual proportion of the whitewall is one of the clearest distinctions between the two on a finished 1940 Willys. If your goal is a specific prewar look, the whitewall width alone can change the car's stance and presentation. Wheel compatibility should still be checked against the actual wheel on the car, especially if it has been restored or altered over the years.

1940 Willys tires in 550-16 fit a 16-inch wheel, and where a rim width range is specified, it is 3.25 to 4.00 inches. That range appears with 550-16 products from Excelsior and Firestone. The key fitment point is that tire size and wheel diameter must agree first, then the actual wheel width should fall within the range called for by the specific tire.

This matters on a 1940 Willys because many prewar cars have lived long lives and may no longer wear the exact wheels they left the factory with. A visually correct wheel can still differ in width. Before mounting new tires, measure the wheel or have a restoration shop verify it so the tire's shape, seating, and overall behavior are appropriate for the setup you are using.

The 550-16 product listings for 1940 Willys do not carry TT or TL markings in the size field, so there is no product-by-product tube designation spelled out in the available lineup. Because 1940 Willys uses a prewar bias-ply fitment on 16-inch wheels, many owners evaluate tube use alongside the wheel type and condition rather than assuming every tire should be mounted the same way.

The practical step is to inspect the wheel itself before installation. Original-style riveted or older rims, wheels with pitting, or wheels intended for tube use often call for a different approach than later airtight rims. A tire installer familiar with vintage wheels can help determine whether your 1940 Willys setup should use tubes, flap components, or a tubeless-compatible mounting approach.

A 1940 Willys should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment. Bias-ply tires can flat-spot more readily during long static storage than many modern radials, so keeping the car on clean surfaces, maintaining pressure, and moving it periodically can help preserve ride quality and sidewall condition.

If a 1940 Willys will sit for months at a time, many collectors either roll the car occasionally or support it in a way that reduces constant load without leaving the suspension hanging unnaturally. Tire covers also help in bright garages. Good storage habits protect not only the tread and sidewalls, but also the appearance of whitewalls, which can discolor more quickly in poor storage conditions.

Tires on a 1940 Willys are usually judged more by age and condition than by mileage, because collector cars often cover limited annual miles. A sensible rule is to evaluate them carefully once they reach the five- to seven-year window and to treat around ten years as a point where replacement deserves serious consideration, even if tread depth still looks acceptable. The DOT date code helps establish age.

That age-based approach matters on a 1940 Willys because a tire can look presentable on a lightly used car while the casing and rubber have already hardened. Sidewall cracking, repeated air loss, or vibration after storage are stronger warning signs than odometer totals. A prewar car driven only to shows and local events still benefits from regular age tracking and a conservative replacement mindset.

Tires on a 1940 Willys should be inspected before every drive and again before any longer outing or tour. Look for sidewall cracking, tread separation, cuts, embedded debris, bulges, and uneven wear, and confirm that the tires are holding pressure consistently. On an older collector car, the condition of the valve stems and the spare should be part of the same routine.

Frequent inspection is especially worthwhile on a 1940 Willys because the car's annual mileage is often low enough that age-related problems can appear before the tread ever wears out. A quick walk-around takes only minutes and can catch a deteriorating sidewall or a pressure issue before it becomes a roadside problem. That habit is one of the simplest ways to keep a prewar car enjoyable and dependable.

A 1940 Willys 40 Series belongs to the prewar era when bias-ply construction was the standard passenger-car tire type, and the fitment available here is 550-16 bias-ply. That makes the current 550-16 bias-ply offerings consistent with the general construction style expected for a 1940 American car. Sidewall appearance could vary by trim presentation and market, so the exact blackwall-versus-whitewall choice should be matched to the individual car.

Owners restoring a 1940 Willys to a factory-minded standard usually start by staying with the correct size and bias-ply construction, then refine the look through the sidewall style. Because period literature, dealer practices, and optional trim packages could influence presentation, marque clubs, factory sales materials, and surviving original cars remain valuable references when you want to settle the final cosmetic details with confidence.

Correct tire fitment matters on a 1940 Willys because judged prewar cars are often evaluated on the overall accuracy of their presentation, not just the paint and upholstery. Size, construction type, and sidewall style all influence whether the car looks appropriate for the year. A tire that is the right diameter but the wrong construction or an obviously modern visual treatment can stand out quickly on an otherwise accurate restoration.

For show use, getting the 550-16 size right is only the first step. The next question is whether the car should wear a blackwall or wide whitewall based on how that specific 1940 Willys would have been delivered or accessorized. Event standards can vary, so owners pursuing top-level authenticity should compare their choice against period photos and the judging expectations of the club or event where the car will appear.

For a 1940 Willys, both Excelsior and Avon offer 550-16 bias-ply blackwall tires. The Excelsior listing includes a 16-inch rim diameter, a 3.25 to 4.00 inch rim width range, and a weight of 16 pounds. The Avon Tourist 550-16 80L is also listed at 16 pounds and adds a maximum load capacity of 992 pounds.

Since both options stay within the same size and blackwall visual theme, the difference is less about changing the car's stance and more about which product details matter most to you. Some owners will care more about matching the wheel width guidance, while others will pay attention to the stated load figure. Either way, the tire should still be selected with the actual wheel and the car's intended use in mind.

1940 Willys tires in 550-16 are available here as bias-ply products, which are fully appropriate for period-style driving when they are in good condition, correctly mounted, and properly inflated. One listed product includes an 80L marking, which denotes an L speed rating, or 75 mph. On a prewar car like a 1940 Willys, the vehicle's brakes, steering, suspension, and overall mechanical condition are often just as important as the tire itself in determining comfortable road speed.

The practical takeaway is to treat highway use as a complete vehicle question, not just a tire question. Fresh, correctly sized bias-ply tires can serve well on a sound 1940 Willys, but steady speeds, conservative following distances, and a thorough mechanical inspection matter greatly. If the car will see extended higher-speed touring, the entire chassis should be evaluated with the same care as the tires.

Inflation pressure for 1940 Willys tires should be set by the tire maker's specifications and checked against the factory guidance for the car itself rather than borrowed from another size or another vehicle. Among the available 550-16 products, Firestone lists a maximum load figure of 840 pounds at 32 psi. That is a tire rating reference, not a universal instruction to run every 550-16 tire on every 1940 Willys at the same pressure.

For real-world use, begin with the vehicle's original guidance if you have it, then confirm the specific tire's rated limits and intended operating range. Pressure affects ride, wear, steering feel, and casing stress on an older bias-ply setup. A 1940 Willys that is driven lightly around town may want a different practical setting than one carrying passengers on longer secondary-road trips, so small adjustments should be made carefully and consistently.

Before a longer drive in a 1940 Willys, inspect each tire for cracks, cuts, bulges, uneven wear, and anything embedded in the tread, then verify cold inflation pressure and check the spare as well. Pay close attention to sidewall condition on an older bias-ply tire, and inspect the valve stems and wheel condition at the same time. A clean, careful tire check should be part of every pre-trip routine on a prewar car.

That tire inspection belongs alongside a broader mechanical once-over that includes brakes, steering play, wheel bearings, fluid levels, and the cooling system. A 1940 Willys can be very enjoyable on a tour when prepared properly, but age makes small issues more consequential than they would be on a modern car. Spending a few extra minutes before departure is usually the difference between a relaxed outing and an avoidable roadside interruption.