1937 Willys Tire Fitment Guide

1937 Willys vehicles in the 37 Series use one tire size: 550-16. That size is shared across the model range listed here, and the available products are all bias-ply tires built for 16-inch wheels. Where rim-width guidance is listed, 550-16 fits a 3.25- to 4.00-inch wheel range.

That makes 1937 Willys tire selection more straightforward than many later cars with multiple fitments. Once you confirm that your car still has the correct 16-inch wheels and falls within the stated wheel-width range, the main decisions become sidewall style, brand preference, and whether you want a subtler blackwall look or a more period-styled wide whitewall appearance.

On a 1937 Willys tire, 550-16 is a numeric bias-ply size. The 5.50 indicates the nominal section width, and the 16 indicates the wheel diameter in inches. Unlike a modern metric radial size, it does not spell out an aspect ratio, and the bias-ply construction is part of the period-correct format rather than a separate R-marked designation.

That matters because a 550-16 should be understood as an older sizing system, not translated casually into a modern metric replacement without checking dimensions and vehicle goals. If your Willys is being restored in a prewar style, keeping the original numeric bias-ply format preserves the right visual proportion and steering feel better than simply chasing a modern-looking equivalent.

Yes. The 1937 Willys models covered here use the same 550-16 tire size, so there is no year-make split between different diameters or alternate fitment groups. All of the available tire choices for this application remain within the same basic size and construction family.

That means identifying a 1937 Willys 37 Series gets you to the correct size quickly, but it does not end the selection process. Owners still need to decide whether the car looks best with blackwalls or wide whitewalls, and they should compare wheel width and overall restoration intent before settling on a specific tire.

1937 Willys tires in 550-16 are available in both blackwall and wide whitewall styles. Blackwall options are offered by Excelsior and Avon, while wide whitewall choices are offered by BFGoodrich and Firestone in this size. All of them stay within the same bias-ply construction format appropriate to the era.

The right sidewall style depends on how you want the car to present. A blackwall usually suits a simpler, more understated prewar appearance, while a wide whitewall creates a dressier period look that many restorers prefer for show presentation. If authenticity matters for a specific body style or event, compare your choice against period photos or a Willys marque specialist's guidance.

Four brands currently cover 1937 Willys in 550-16: Excelsior, Avon, BFGoodrich, and Firestone. Every listed option is a bias-ply tire for a 16-inch wheel, but the brands differ in styling emphasis, with some focused on blackwall presentation and others offering wide whitewall versions for a more formal prewar look.

Brand choice on a 1937 Willys often comes down to the character of the restoration rather than a different base fitment. If you are trying to capture a clean driver appearance, a blackwall may make the most sense; if you want stronger period visual impact, one of the whitewall offerings may suit the car better while staying within the same vintage construction style.

For 1937 Willys in 550-16, Excelsior and Firestone both offer bias-ply fitments on 16-inch wheels, but they differ in presentation and listed specifications. The Excelsior option is a blackwall tire weighing 16 pounds, while the Firestone option is a 2.50-inch wide whitewall weighing 19 pounds. Firestone also lists a maximum load of 840 pounds at 32 psi, and both brands show a 3.25- to 4.00-inch rim-width range on the products where that information appears.

That comparison makes the choice fairly practical. Excelsior suits an owner who wants a more restrained blackwall look, while Firestone is aimed at a more decorative whitewall presentation with a different visual stance on the car. Because both remain in the same 550-16 bias-ply size, the decision is mostly about appearance and product specification rather than a change in basic fitment.

For 1937 Willys in 550-16, the listed rim-width range is 3.25 to 4.00 inches on the products where wheel-width guidance appears. The tire size itself mounts on a 16-inch wheel, but wheel width still matters because an older bias-ply tire is intended to sit on a relatively narrow rim compared with many modern wheel combinations.

Checking your actual wheel before choosing a tire is worthwhile, especially on a prewar car that may have changed hands many times. A 16-inch diameter alone is not enough if the wheel width has been altered or replaced. Measure the wheel, compare it to the stated range for the tire you are considering, and keep the fitment within the intended proportions for proper stance and behavior.

The available 1937 Willys 550-16 products are presented as bias-ply tires, but the tube marking is not consistently spelled out in the size line. On a prewar application like 1937 Willys, tube use is commonly tied as much to the wheel design and condition as to the tire itself, especially if the car still has original-style rims.

That is why tube selection should be confirmed against the exact tire and wheel combination rather than assumed from the size alone. If your Willys retains original wheels, inspect the rim condition carefully, verify whether the wheel is appropriate for tube-type service, and match the tube and valve setup to the specific tire you intend to run.

A 1937 Willys should be stored away from direct sunlight, electric motors, ozone sources, and standing moisture, all of which shorten tire life. Bias-ply tires also tend to flat-spot more readily than radials when they sit in one position for long periods, especially on a lightly driven collector car that spends more time parked than on the road.

Good storage habits make a noticeable difference in how the car feels when it comes back into service. Keep the tires properly inflated, move the car periodically to change the contact patch, and consider stands for longer storage intervals if the vehicle will remain parked for months. A clean, dry, temperature-stable garage does more for tire longevity than occasional cosmetic treatment.

Tires on a 1937 Willys should be judged more by age and condition than by mileage. On a collector vehicle, it is sensible to begin evaluating tires closely once they are around five to seven years old and to consider replacement as they approach ten years, even if tread wear still looks minimal. The DOT date code on the tire helps establish age.

That approach is especially important on an older car that may only be driven to shows, local events, or occasional weekend outings. A tire can look presentable and still be aging internally. If the sidewalls show cracking, the casing has hardened noticeably, or the car has been stored poorly, replacement should move ahead of any mileage-based expectation.

Tires on a 1937 Willys should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, irregular tread wear, and any sign that the tire is not holding pressure consistently. On a prewar car, valve stems and any tube-related hardware deserve the same attention as the tread and casing.

Frequent inspection is part of normal stewardship for an older vehicle, not a sign that something is wrong. A quick walk-around catches many issues before they turn into roadside problems, and it is especially important after seasonal storage. If the car has been parked for a while, give the tires time to reveal any flat-spotting or vibration before settling into normal driving.

The 1937 Willys 37 Series uses 550-16 sizing in a bias-ply format, which aligns with what buyers would expect on a prewar American car of this type. Bias-ply construction was standard for the period, and that makes the current 550-16 bias-ply offerings the right starting point for an appearance faithful to the era. Original-equipment branding could vary by market and supply, so the core authenticity point is the size and construction.

For a restoration, the most important first step is keeping the car in the correct size family and avoiding a modern-looking substitute that changes the profile. After that, sidewall style becomes the main visual decision. If you are trying to match a specific factory presentation, sales brochure, or judged event standard, a Willys club or prewar marque specialist can help narrow the right finishing details.

Correct tire fitment matters a great deal when showing a 1937 Willys, especially in preservation or authenticity-focused classes. Judges and knowledgeable enthusiasts notice whether the car wears the right size family, the correct period construction, and a sidewall style that matches the character of the restoration. A modern radial look or an era-inappropriate sidewall treatment can stand out immediately on a prewar car.

That does not mean every shown Willys must be restored to the same exact visual standard, but it does mean the tire should support the story the car is telling. If the car is presented as factory-correct, keep the tire size and construction in line with the period. If the event has its own judging rules, confirm those standards before finalizing blackwall versus whitewall appearance.

BFGoodrich and Firestone both offer wide whitewall 550-16 bias-ply tires for 1937 Willys, so the basic fitment and visual theme are closely aligned. The BFGoodrich version is listed with a 2.25-inch whitewall, while the Firestone version carries a 2.50-inch whitewall. Firestone also lists a maximum load of 840 pounds at 32 psi and a 3.25- to 4.00-inch rim-width range on the product details shown here.

That makes the decision largely one of visual proportion and detail rather than category. A slightly different whitewall width can change the car's overall presence more than many owners expect, especially on a compact prewar body. If you are trying to match a certain period photo, judging standard, or family-memory look, compare the whitewall width carefully before choosing between the two.

1937 Willys tires in 550-16 are available here in bias-ply construction, and one listed product carries an 80L marking, which corresponds to a 75 mph speed capability. That is enough to show that period-style tires can support normal road use within their intended range. On a prewar Willys, the practical limits of brakes, steering, suspension, gearing, and overall vehicle condition usually matter as much as the tire itself in real highway use.

Safe highway driving starts with matching your speed to the car's age and condition, not simply to the highest number you can find on a tire. Keep the tires properly inflated, make sure the wheels are sound, and use realistic cruising speeds for a 1930s vehicle. A well-sorted Willys on the correct tires can be enjoyable on modern roads, but it should still be driven with period-appropriate expectations.

Inflation pressure for 1937 Willys tires should be tied to the exact tire you choose and the vehicle guidance for the car itself. One Firestone 550-16 option lists a maximum load of 840 pounds at 32 psi, which is a rated figure for that tire rather than a blanket setting for every 550-16 product. Other products in the same size may publish different load or pressure information.

Use the original owner's manual or period service literature as your baseline for vehicle pressure targets, then confirm that your chosen tire's operating limits support that use. Do not transfer a pressure number from one brand to another simply because the size matches. On a lightweight prewar car, correct pressure affects steering feel, ride quality, tread wear, and the tendency of a bias-ply tire to track or wander.

Before a longer drive in a 1937 Willys, inspect each tire for cracks, cuts, bulges, uneven wear, and signs of age hardening. Confirm cold inflation pressure, look closely at valve stems, and check the spare as carefully as the four tires on the ground. A prewar car should also have its wheels, brakes, steering, cooling system, and basic fluid condition reviewed before the trip begins.

Longer drives are where small issues become real interruptions, so a careful pre-drive routine pays off. If the car has been sitting, start with a short local run to settle the tires and listen for vibration or pulling before committing to distance. Carrying simple roadside tools and knowing the age of the spare can matter just as much as the condition of the main set.