In 1930, De Soto was still a young Chrysler Corporation marque, positioned to give buyers a well-equipped car at a price point below Chrysler but above many entry-level competitors. The lineup reflected the fast-moving late-1920s and early-1930s market, with six-cylinder and eight-cylinder models aimed at different buyers and different levels of prestige. For 1930 De Soto, tire sizing varies by model rather than carrying across the full range, with the De Soto 6 using one 19-inch bias-ply size and the De Soto 8 using another. The first thing to confirm is which model you have, because that determines the correct size before you compare specific tire designs.
Which Tire Size Is Right for Your 1930 De Soto
Two tire sizes are used across 1930 De Soto vehicles, and they are model-specific rather than shared across the full lineup. Both are 19-inch bias-ply sizes, so the real choice starts with confirming whether your car is a De Soto 6 or a De Soto 8 before narrowing down the right tire style. Understanding that distinction first saves time and helps you choose a tire that matches the correct model.
Year(s): 1930|Fit(s): 6|Construction: Bias Ply|Rim: 19 in
500-19 is a numeric bias-ply size in which the 5.00 figure identifies the nominal section width and the 19 identifies the wheel diameter, and on 1930 De Soto it is specific to the De Soto 6 rather than the full model range. Available choices in this size include Excelsior and Firestone, both in blackwall form, with tube marking and speed-rating detail varying by product presentation rather than being stated uniformly here. Buyers restoring a De Soto 6 and wanting an era-correct prewar construction should focus on this size, then compare the individual tread style and intended use of each offering.
Year(s): 1930|Fit(s): 8|Construction: Bias Ply|Rim: 19-in rim
5.25-19 is a numeric bias-ply size in which the 5.25 figure denotes the nominal section width and the 19 indicates the wheel diameter, and for 1930 De Soto it is specific to the De Soto 8. Product selections, sidewall treatments, and detailed service markings need to be confirmed within the tires offered in this exact size rather than assumed from the 500-19 options used on the De Soto 6. Owners of a De Soto 8 should stay with this size when the goal is proper model-specific fitment and a period-appropriate prewar look.
Both 1930 De Soto sizes mount on 19-inch wheels, but rim width should still be confirmed against the exact tire you choose.
1930 De Soto Models
Two 1930 De Soto models are covered here. They do not share the same tire size, so identifying whether you have a De Soto 6 or De Soto 8 matters before choosing a tire. Select your model below for model-specific fitment history and the products that apply to it.
1930 De Soto 6
The 1930 De Soto 6 represented the core of the brand's practical, value-conscious offering during De Soto's early years under Chrysler. Its tires mount on 19-inch wheels, and the correct fitment for this model is the narrower of the two year-specific sizes used across the De Soto range.
The 1930 De Soto 8 sat higher in the lineup and reflected the era's fascination with smoother, more prestigious eight-cylinder automobiles. Its tires also mount on 19-inch wheels, but this model uses a different size than the De Soto 6, so buyers should not assume interchangeability across the full 1930 make range.
Two products are available across two tire sizes for 1930 De Soto vehicles. The 500-19 size includes two Excelsior and Firestone bias-ply blackwall options, while 5.25-19 remains a separate fitment category tied to De Soto 8 applications, so confirm your exact model and size preference first.
These answers cover the model-specific tire sizing used across 1930 De Soto cars, how to read early numeric bias-ply sizes, and what to check for restoration accuracy, wheel compatibility, storage, and road use.
Size Basics & Fitment
What tire sizes fit 1930 De Soto vehicles?
1930 De Soto vehicles use two different tire sizes, and they are tied to specific models rather than shared across the full make. The De Soto 6 uses 500-19, while the De Soto 8 uses 5.25-19. Both are bias-ply sizes built for 19-inch wheels. In the currently available 500-19 offerings, the listed rim width range runs from 4 inches to 5 inches, with one product specified at 4 inches and another at 4.00 to 5.00 inches.
The practical takeaway is that year and make alone are not enough for a 1930 De Soto tire purchase. You need to identify whether the car is a six-cylinder or eight-cylinder model first, then confirm the wheel it is currently wearing still matches the intended factory-type diameter. That matters especially on older restorations, where wheels can be swapped over time.
What does 500-19 mean on a 1930 De Soto tire?
On a 1930 De Soto, 500-19 is an early numeric bias-ply tire size. The 5.00 portion refers to the nominal section width, while the 19 identifies the wheel diameter in inches. It does not describe a modern aspect ratio the way a later metric radial size would. On 1930 De Soto applications, 500-19 belongs to the De Soto 6.
That older numeric sizing system is important because it tells you the tire's family and intended wheel diameter, but it should not be translated directly into a modern radial code without research. If your De Soto 6 is being restored for original appearance, staying with the proper numeric bias-ply size keeps the look and stance much closer to what buyers expected in 1930.
Do all 1930 De Soto models use the same tire size?
No, 1930 De Soto models do not all use the same tire size. The De Soto 6 uses 500-19, while the De Soto 8 uses 5.25-19. Both are 19-inch bias-ply tires, but the size itself changes with the model. That makes this year-and-make page a starting point rather than the final step in choosing the correct tire.
Model identification matters because the wheel diameter alone does not tell the whole story. A 19-inch fitment on one 1930 De Soto does not automatically make it correct for another model in the same showroom year. If the car has had a long restoration history, compare the tire size on the vehicle to the model designation before settling on a replacement.
Buying the Right Tire
What sidewall styles are available for 1930 De Soto tires?
Available 1930 De Soto tire offerings shown here use blackwall sidewalls. In the 500-19 fitment for the De Soto 6, both listed products are blackwall bias-ply tires. Blackwall styling is fully in character for an early-1930s American car and suits drivers who want an authentic prewar appearance rather than a later decorative sidewall treatment.
Sidewall appearance can matter almost as much as size on a restoration because it changes the whole visual character of the car. When you narrow your choice, compare the sidewall and tread presentation to the way you want the car judged or displayed. A touring driver and a show-focused owner may choose the same size, but not always the same tire design.
What brands make tires for 1930 De Soto vehicles?
Excelsior and Firestone both have offerings in the 500-19 size used by the 1930 De Soto 6. Both of those available choices are bias-ply blackwall tires on 19-inch fitments. Firestone carries especially strong period recognition in the collector market, while Excelsior is also well established for vintage applications and prewar-style replacements.
Brand choice on a 1930 De Soto often comes down to how you plan to use the car and the visual character you want. Some owners prioritize a familiar historic name, while others focus on a specific tread pattern or intended use within the same size. Once the correct model and size are confirmed, comparing brand-specific design details becomes much easier.
What is the difference between Excelsior Comp H and Firestone Dirt Track for the 1930 De Soto?
Within the 500-19 size used on the 1930 De Soto 6, the Excelsior Comp H and Firestone Dirt Track differ in series design and service details. The Excelsior Comp H is listed at 20 pounds with a 4-inch rim width specification. The Firestone Dirt Track Ribbed Front is listed at 19 pounds, carries an 895-pound maximum load at 32 psi, and fits a wider stated rim width range of 4.00 to 5.00 inches.
Those differences mean the two tires should not be treated as interchangeable simply because they share the same size code. Compare the wheel on your De Soto 6 to the tire's stated rim width requirement, then think about whether the tread style suits a restoration, display car, or a more specialized traditional build. Matching the tire to the wheel is just as important as matching the code on the sidewall.
Fitting & Setup
What rim width do 1930 De Soto tires require?
Rim width requirements for 1930 De Soto tires depend on the exact tire chosen within the correct size. In 500-19, one listed tire specifies a 4-inch rim, while another lists a usable range of 4.00 to 5.00 inches. Both fit 19-inch wheels, but the wheel width still matters to the tire's profile and proper seating.
That is why it is wise to confirm the actual wheel dimensions on the car before making a final decision, especially on a prewar vehicle that may have changed hands many times. Even when the wheel diameter is correct, a tire designed around one rim width may look or behave differently on another. Checking the wheel first helps avoid unnecessary fitment surprises.
Do 1930 De Soto tires require inner tubes?
1930 De Soto tires are bias-ply prewar fitments, but inner-tube status should be confirmed on the exact tire you plan to use. The available 500-19 product information here does not show a uniform tube marking across every option, so tube requirements should be verified product by product rather than assumed across the whole size. That is especially important on older-style wheels and restorations.
A tube decision is never just about the tire itself. Wheel construction, wheel condition, and the way the car will be driven all affect the setup. Before mounting a tire on a 1930 De Soto, make sure the wheel is appropriate for the intended tire, inspect the valve stem area carefully, and confirm whether a fresh tube and flap are recommended for your exact combination.
Can the original 1930 De Soto wheels be used with both tire sizes?
Original-style 1930 De Soto wheels can share the same 19-inch diameter across both listed tire sizes, but that does not make the sizes universally interchangeable between models. The De Soto 6 uses 500-19 and the De Soto 8 uses 5.25-19. Rim diameter compatibility is common to both, while the correct size still depends on the specific model and the wheel width in use.
That means a 19-inch wheel is only the first checkpoint. The better question is whether the actual wheel on your car matches both the model's intended tire size and the selected tire's approved rim width. On a long-restored prewar car, verifying the wheel before mounting can prevent mismatched proportions and unnecessary troubleshooting.
Maintenance, Storage & Longevity
How should I store a 1930 De Soto when the tires are fitted?
A 1930 De Soto should be stored in a cool, dry, dark space away from direct sunlight, electric motors, furnaces, welders, and other ozone-producing equipment. Bias-ply tires are more prone than radials to developing temporary flat spotting when they sit in one position for long periods. Keeping the tires clean, properly inflated, and off damp concrete helps protect both the rubber and the wheels.
If the car will sit for months, move it periodically or place it on stands to reduce static loading. Owners who prefer to keep the car on its wheels should roll it enough to change the contact patch from time to time. A storage routine like that does more for long-term tire condition than low annual mileage alone.
How long do tires on a 1930 De Soto typically last?
Tires on a 1930 De Soto should be judged more by age and condition than by miles traveled. Collector-car tires often age out before the tread is worn, so a careful evaluation around the five- to seven-year mark is sensible, with replacement strongly considered as tires approach ten years from their date code. Cracking, hardening, or repeated air loss can shorten that window.
That matters on a prewar car because many are driven lightly and can appear fine at a glance while the rubber has already aged beyond its best years. Check the manufacturing date on each tire and treat the spare with the same seriousness as the four on the ground. A low-use car still deserves age-conscious tire maintenance.
How often should tires on a 1930 De Soto be inspected?
Tires on a 1930 De Soto should be inspected before every drive and again before any longer outing. Look for sidewall cracking, tread separation, punctures, bulges, uneven wear, and pressure loss. On an older bias-ply fitment, special attention should also go to valve stems and any tube-related leakage concerns if the setup uses tubes.
Regular inspection is especially important because a lightly driven collector car can hide tire problems that would show up more quickly on a daily driver. A quick walk-around before the engine is started can catch aging or damage before it becomes a roadside issue. Longer tours justify a deeper inspection, including the spare and the tools needed to use it.
Restoration & Authenticity
What tires were originally fitted to the 1930 De Soto 6?
A 1930 De Soto 6 was originally the kind of car that would have worn bias-ply tires, because radial construction did not define American passenger-car fitment in that era. The size associated here with the De Soto 6 is 500-19, which matches the period-correct numeric sizing system used on prewar automobiles. No original-equipment brand should be assumed without marque-specific confirmation for the exact body style and market.
For a restoration, the important first step is matching the correct size and construction type to the actual model. After that, sidewall style and tread character become part of the authenticity conversation. If you are preparing a car for judged showing, consult De Soto club resources or period factory literature to confirm whether any body-style or market-specific variations apply to your car.
Does correct tire fitment matter for showing a 1930 De Soto?
Correct tire fitment matters on a 1930 De Soto because judges and knowledgeable enthusiasts often look closely at size, construction type, and sidewall presentation. A De Soto 6 wearing 500-19 bias-ply tires and a De Soto 8 wearing 5.25-19 bias-ply tires are aligned with the period character expected for an early-1930s American automobile. Using the wrong model-specific size can stand out even before finer restoration details are considered.
For show use, tire choice affects more than scoring alone. It influences the stance, the wheel opening appearance, and whether the car reads as authentically prewar at a glance. Event rules vary, so owners aiming for formal judging should check with the sponsoring club or marque experts to understand how strictly tire details are weighed in that venue.
What is the difference between Excelsior Comp H and Firestone Dirt Track for the 1930 De Soto?
For a 1930 De Soto 6 running 500-19 tires, the Excelsior Comp H and Firestone Dirt Track differ in listed rim-width specification, weight, and series character. The Excelsior Comp H is shown with a 4-inch rim width and a 20-pound weight. The Firestone Dirt Track Ribbed Front is shown at 19 pounds, with a 4.00-to-5.00-inch rim-width range and a stated maximum load of 895 pounds at 32 psi.
Those details matter to restorers because authenticity is not only about sidewall branding. The exact series and tread style can influence whether the car presents as a faithful roadgoing restoration or as something with a more specialized vintage competition flavor. If judging accuracy is the priority, compare the visual character of each tire against period photographs and marque guidance before making the final choice.
Safety & Road Use
Are 1930 De Soto tires safe for highway driving?
1930 De Soto tires can be suitable for road use when they are the correct size, in good condition, properly mounted, and inflated appropriately for the vehicle and tire. The listed 500-19 options here are bias-ply tires, and no speed-rating markings are shown for them in the available details. On a car from 1930, the overall mechanical condition of the brakes, steering, suspension, and wheels is every bit as important as the tire itself.
Bias-ply behavior is different from a later radial, so the driver should expect period-correct steering feel and response rather than modern-car manners. A longer drive is best approached only after checking age, condition, balance, and pressure, and after confirming the rest of the chassis is equally roadworthy. Tire safety on a prewar car is always part of the whole vehicle's condition.
What inflation pressure should I use for 1930 De Soto tires?
Inflation pressure for 1930 De Soto tires should follow the vehicle's original recommendations first, with the tire's own service limits also respected. In the available 500-19 offerings, one Firestone tire lists a maximum load of 895 pounds at 32 psi. That figure is a tire service limit, not a blanket inflation recommendation for every 1930 De Soto tire or every size in the lineup.
The right approach is to use the factory guidance for the car as your baseline, then confirm that your chosen tire's rated pressure and load range are compatible with that application. Avoid transferring one pressure figure from a De Soto 6 tire to a De Soto 8 tire just because both fit 19-inch wheels. Size, product design, and vehicle setup should all be matched carefully.
What should I check before taking a 1930 De Soto on a longer drive?
Before a longer drive in a 1930 De Soto, inspect every tire for cracking, cuts, bulges, irregular wear, and secure valve stems, then verify air pressure when the tires are cold. Check the spare as carefully as the four road tires, since many collector cars carry an old spare that has been ignored for years. Wheel condition, lug security, and overall tire age deserve the same attention.
A pre-drive inspection should also extend beyond the tires because a 1930 automobile asks more from the owner than a modern daily driver. Brakes, steering play, fluids, and lighting all deserve a look before distance driving. When the tire condition is sound and the rest of the car is equally prepared, a 1930 De Soto is much better positioned for an enjoyable outing.
