1947 De Soto Tire Fitment Guide

1947 De Soto vehicles use three tire sizes across the model range: 6.50-15, 650-16, and 700-15. The 6.50-15 size applies to the 1947 De Soto 6 Custom and 6 Deluxe, while 650-16 and 700-15 apply to the 1947 De Soto 6 Deluxe & Custom listing. Where wheel specifications are available, 650-16 mounts on 16-inch rims with a 4.50 to 5.00 inch rim-width range, and 700-15 mounts on 15-inch rims with a 5.00 to 5.50 inch rim-width range.

That means not every 1947 De Soto uses the same tire, even though the cars come from the same year and make. Start by identifying the exact model application, then verify the wheel diameter on the car before choosing between available products. On cars that have been restored decades ago, wheels are sometimes swapped, so the mounted wheel should always be treated as the final checkpoint.

A 6.50-15 tire on a 1947 De Soto is a traditional numeric bias-ply size. The 6.50 refers to the nominal section width class, and the 15 identifies the rim diameter in inches. On this year and make, 6.50-15 is associated with the 6 Custom and 6 Deluxe model listings rather than the separate Deluxe & Custom application that uses other sizes.

Numeric sizing can look simple, but it still needs to be matched carefully to the wheel already on the car. A buyer comparing 6.50-15 to 650-16 or 700-15 should not assume the numbers are interchangeable just because they are all period bias-ply sizes. The correct choice begins with model identity and wheel diameter, not just the overall vintage appearance of the tire.

Both 650-16 and 700-15 are traditional numeric bias-ply sizes used on 1947 De Soto applications. In each case, the first number indicates the nominal section width class and the final number gives the wheel diameter in inches, so 650-16 fits a 16-inch rim and 700-15 fits a 15-inch rim. Those two sizes are tied to the 1947 De Soto 6 Deluxe & Custom listing rather than the full De Soto model range for the year.

The practical difference is that these codes are describing two separate wheel fitments, not just a small variation within one modern-size family. Buyers sorting out a Deluxe & Custom car should check the wheel before selecting a tire, because the available 650-16 and 700-15 products do not mount on the same rim diameter. That step prevents ordering a tire that is correct in era but wrong for the wheel on the car.

1947 De Soto tires are available in both blackwall and wide whitewall styles within the listed 650-16 and 700-15 product ranges. The 650-16 selection includes blackwall examples from Coker Classic and Firestone, along with wide whitewall options from BFGoodrich and Garfield. The 700-15 range likewise includes blackwall and wide whitewall offerings, including Firestone and BFGoodrich wide whitewalls plus blackwall options from Firestone and STA.

For a postwar American car like a 1947 De Soto, sidewall style affects the finished look almost as much as the wheel itself. Wide whitewalls generally suit a dressier restoration theme, while blackwalls give a plainer, more utilitarian appearance. If authenticity matters for a show car, it is wise to compare the intended presentation of the car with period photos and the standards used by De Soto and Mopar enthusiast groups.

Several brands cover the listed tire sizes for 1947 De Soto vehicles. In 650-16, the available brands are BFGoodrich, Coker Classic, Firestone, and Garfield. In 700-15, the listed brands are Firestone, BFGoodrich, and STA. All of the available products shown for these sizes are bias-ply constructions, which keeps the overall choices consistent with the car’s postwar era.

Brand choice on a 1947 De Soto usually comes down to the exact size you need and the sidewall appearance you want rather than a completely different fitment philosophy. Some buyers focus on a familiar historic American brand name, while others care more about whether the tire is offered in blackwall or wide whitewall form. Once the size is settled, the brand decision becomes much easier to narrow in a sensible way.

Within the 700-15 size for 1947 De Soto vehicles, both Firestone and BFGoodrich offer bias-ply wide whitewall options with a listed maximum load capacity of 1700 pounds at 32 psi. The Firestone 4.125 inch whitewall is listed at 29 pounds, while the BFGoodrich 4.125 inch whitewall is listed at 28 pounds. Firestone also appears in a blackwall 700-15 version with the same 1700 pounds at 32 psi rating, giving that brand a broader style spread within the size.

For a buyer, that means the real comparison is less about basic compatibility and more about appearance details and brand preference within the same period-correct size. If your goal is a wide whitewall look, either brand stays within the same load-and-pressure envelope shown here. If you want a blackwall 700-15 instead, Firestone opens that path in this size without changing wheel diameter or construction type.

Rim-width guidance is available for two of the listed 1947 De Soto sizes. The 650-16 size is paired with a 16-inch rim and a recommended rim-width range of 4.50 to 5.00 inches. The 700-15 size is paired with a 15-inch rim and a recommended rim-width range of 5.00 to 5.50 inches. Those ranges should be treated as size-specific rather than interchangeable across the De Soto lineup.

That matters because a tire can be correct in overall size family but still be a poor match for the wheel if the rim is too narrow or too wide. Before mounting a new set, measure the wheel or confirm the wheel specification through the restoration paperwork already with the car. Matching tire size to actual rim width helps preserve the intended stance, tread shape, and steering feel of a full-size postwar De Soto.

Original 1947 De Soto wheels cannot be assumed to work with all three listed sizes, because the size range spans both 15-inch and 16-inch rim diameters. The 6.50-15 and 700-15 sizes are 15-inch fitments, while 650-16 is a 16-inch fitment. Rim-width guidance also differs where it is available, with 650-16 calling for 4.50 to 5.00 inch rims and 700-15 calling for 5.00 to 5.50 inch rims.

The practical takeaway is that wheel diameter should be checked first, especially on a car with a long restoration history or parts from more than one De Soto donor. Once the wheel diameter is confirmed, compare the wheel width to the range used by that exact tire size. That is a much better approach than assuming every wheel from a 1947 De Soto family will accept every period tire listed for the year.

A 1947 De Soto should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can age rubber. Bias-ply tires also benefit from correct inflation during storage and from moving the car periodically so the casing is not parked in one position for months at a time. Clean floors, stable temperature, and protection from standing moisture all help preserve sidewalls and tread.

If the car will sit for a long season, many collectors either roll it occasionally or support it in a way that reduces constant load on one spot of the tire. That is especially helpful with vintage-style bias-ply construction, which can develop temporary flat-spotting more readily after long static storage. Good storage habits often do more for the life of collector tires than low annual mileage alone.

Tires on a 1947 De Soto are usually judged more by age and condition than by mileage, because many collector cars are driven infrequently. A sensible rule is to begin evaluating them closely once they are about five to seven years old and to treat around ten years as a serious replacement checkpoint, even if the tread still looks good. The DOT date code and the overall condition of the casing matter more than odometer use on a car of this type.

That approach is important because old rubber can harden, crack, or lose structural confidence long before a classic car wears the tread down. A De Soto that only sees occasional weekend use can still be riding on tires that have aged out. If the car is new to you, checking the age of all five tires, including the spare, is one of the smartest first steps you can take.

Tires on a 1947 De Soto should be inspected before every drive and again before any extended outing. Look for sidewall cracking, tread separation, punctures, uneven wear, bulges, impact damage, and pressure loss. Because these are vintage-style fitments and many collector cars spend time parked, the inspection should include the valve stems and a close look at any tire that has been carrying weight in one position for a long period.

A short local drive can hide issues that become obvious only after sustained speed and heat buildup, so a pre-drive check is never wasted effort on a postwar car. It also helps establish a baseline for steering feel and ride quality if you are returning a De Soto to the road after storage. Routine inspections are simple, but they are one of the best defenses against age-related tire trouble.

A 1947 De Soto 6 Custom would have been fitted with bias-ply tires in period practice, and the listed size associated with that model is 6.50-15. That aligns with what buyers would expect from an American passenger car in the immediate postwar period, when bias-ply construction was standard equipment. The available year-and-make fitment information points you to the correct size family first, while market-specific details can still vary within the broader De Soto lineup.

For a restoration, the most important authenticity checkpoints are correct size, correct construction type, and a sidewall treatment that matches the look you are trying to recreate. If you are preparing a judged car, it is smart to compare your tire choice with factory literature, period photos, and De Soto or Mopar club guidance. That extra step helps settle details that go beyond the broad fitment range shown here.

Correct tire fitment absolutely matters when showing a 1947 De Soto, especially at events that reward period accuracy. Judges and knowledgeable enthusiasts often notice whether the tire size fits the model, whether the construction matches the era, and whether the sidewall style suits the way the car would have appeared when new or in period use. A mismatch in rim diameter, an obviously wrong size family, or an out-of-place sidewall treatment can distract from an otherwise careful restoration.

That does not mean every show uses identical standards, but it does mean tires are part of the visual and historical story of the car. A blackwall or wide whitewall decision can change the personality of a postwar De Soto just as much as hubcaps or trim. Before finalizing a show setup, compare your plan with event rules and the preferences of marque-specific judging groups.

Within the 650-16 size for 1947 De Soto vehicles, Firestone is offered as a blackwall bias-ply tire with a listed maximum load capacity of 1580 pounds at 32 psi, a 16-inch rim diameter, and a 4.50 to 5.00 inch rim-width range. Coker Classic also appears in 650-16 as a blackwall bias-ply tire on a 16-inch rim, but the listed specifications here do not include a load-and-pressure figure or rim-width range alongside that product. Their stated weights differ as well, with Firestone listed at 23 pounds and Coker Classic at 25 pounds.

For a restoration-minded buyer, both products stay within the same visual category of blackwall bias-ply fitment, so the decision is more refined than simply choosing between two different eras of tire. Firestone’s listed specifications are more complete in this size, while Coker Classic remains a valid path for buyers focused on the same blackwall presentation. Confirming the wheel width before mounting remains important whichever product you select.

1947 De Soto tire offerings shown here are bias-ply products, and the listed examples do not include modern speed-rating letters to compare by mph ceiling. A properly mounted, properly inflated, and properly maintained bias-ply tire in the correct size can be used for normal road driving, but it will still behave like a period-style tire rather than a modern radial. On a postwar De Soto, the age and condition of the whole car often matter just as much as the tire itself when judging highway readiness.

That means the question is not only whether the tire is new enough, but whether the brakes, steering, suspension, and wheel condition are equally ready for sustained road use. Bias-ply tires can track road grooves differently and may feel less settled than modern drivers expect. A cautious shakedown drive, proper inflation, and a realistic cruising pace are sensible steps before taking a 1947 De Soto onto faster roads.

Inflation pressure on 1947 De Soto tires should follow the vehicle’s factory guidance first and the tire manufacturer’s specifications second, rather than borrowing one figure across every size. The listed products show maximum load capacities of 1580 pounds at 32 psi for certain 650-16 tires and 1700 pounds at 32 psi for certain 700-15 tires. Those figures describe the tire’s rated load at a stated pressure, but they are not automatically the same as the carmaker’s recommended running pressure for every driving condition.

That distinction matters because underinflation and overinflation both change how a large postwar car rides and steers. Use the size-specific tire information as a limit reference, then compare it with the owner’s manual or trusted marque guidance for the actual vehicle setup. If your De Soto has restored or replacement wheels, it is also worth confirming the wheel condition before settling on final operating pressure.

Before a longer drive in a 1947 De Soto, inspect all mounted tires and the spare for cracking, cuts, bulges, punctures, tread wear, and signs of long-term flat spotting. Verify cold inflation pressure, check valve stems, and make sure the tire size on the car matches the wheel diameter actually fitted. Since these are vintage applications, it is equally wise to inspect the wheel itself for corrosion, damage, or signs that an old restoration has mixed components from different setups.

A longer trip also puts more heat into the tires, so even a small issue that seems harmless around town can become more serious after an hour on the road. Tires should be part of a broader mechanical review that includes brakes, steering play, wheel bearings, and suspension condition on a car of this age. Preparing that way gives a 1947 De Soto its best chance of being enjoyable rather than stressful on the open road.