By 1930, Stutz still stood apart as an American prestige marque with a sporting reputation, building fast, expensive automobiles for buyers who wanted something more exclusive than the mainstream luxury field. The lineup that year ranged from the L6 and L8 to the larger Model M, and tire choice follows that split rather than carrying across the full range. 1930 Stutz uses four bias-ply sizes across two model groups, with the practical decision centered first on identifying whether you have an L6/L8 or an M, and then confirming which of that model’s two period-size conventions matches your wheels. Starting with the correct model and rim diameter will narrow the field quickly.
Which Tire Size Is Right for Your 1930 Stutz
Four tire sizes appear across 1930 Stutz vehicles, and they vary by model rather than being shared across the whole make. The real choice starts with confirming whether your car is an L6 or L8 on 19-inch wheels or a Model M on 20-inch wheels, then matching the correct period size format for that application. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 1930|Fit(s): L6 & L8|Construction: Bias Ply|Rim: 19-in rim
31X6.00 is an antique diameter-by-section size, with 31 representing overall tire diameter and 6.00 representing nominal section width, and it is specific to 1930 Stutz L6 and L8 models rather than the full Stutz range. Available product coverage is centered on the same L6 and L8 fitment family, and this size belongs to the early diameter-based sizing language common in the period. Buyers pursuing an era-authentic look and original-style construction will usually focus on this style of bias-ply sizing after confirming the actual wheel and fitment history of the car.
Year(s): 1930|Fit(s): L6 & L8|Construction: Bias Ply|Rim: 19 in
600-19 is a numeric bias-ply size in which 6.00 refers to nominal section width and 19 is the wheel diameter, and on 1930 Stutz it is limited to L6 and L8 models. Lester is offered in this size with a wide whitewall sidewall treatment. This is the size to consider if your L6 or L8 is equipped for the numeric 19-inch fitment and you want a traditional bias-ply tire with period visual character.
Year(s): 1930|Fit(s): M|Construction: Bias Ply|Rim: 20-in rim
32X6.20 is an antique diameter-by-section size, with 32 indicating overall tire diameter and 6.20 indicating nominal section width, and it is specific to the 1930 Stutz M. This format reflects the earlier naming convention used on large luxury and sporting cars before numeric sizing became the more familiar reference. Owners restoring a Model M to period presentation will want to verify whether their wheels and existing fitment history point to this diameter-based size.
Year(s): 1930|Fit(s): M|Construction: Bias Ply|Rim: 20 in
650-20 is a numeric bias-ply size in which 6.50 is the nominal section width and 20 is the wheel diameter, and for 1930 Stutz it applies only to the Model M. Firestone, Denman, and Deka are available in this size, with blackwall and wide whitewall sidewall styles offered; Firestone examples in this size carry a 2120-pound maximum load at 60 psi and fit 3.00- to 5.00-inch rims. This size suits Model M owners who have confirmed the 20-inch numeric fitment and want to choose among period-style blackwall or whitewall presentations.
Two Stutz model groups are covered for 1930, and they do not share the same tire sizes. L6 and L8 cars use 19-inch fitments, while the Model M steps up to 20-inch sizes, so identifying the model is essential before choosing a tire. Select a model below to narrow in on model-specific fitment history and the products that apply.
1930 Stutz L6 & L8
The 1930 Stutz L6 and L8 represent the marque’s smaller-displacement luxury-performance offerings, still carrying the brand’s upscale and sporting identity even as the market was changing rapidly at the start of the Depression. Their tires mount on 19-inch rims, and the fitment range includes both an antique diameter-based size and a numeric bias-ply size tied specifically to this model group.
The 1930 Stutz M sat higher in the lineup as a larger, more imposing luxury automobile, the kind of car that emphasized presence as much as engineering prestige. Its tires mount on 20-inch rims, and the fitment options center on two larger bias-ply sizes associated only with the Model M.
Seven products are available across four tire sizes for 1930 Stutz vehicles. The 600-19 fitment includes one Lester bias-ply wide whitewall option, while 650-20 includes six bias-ply offerings from Firestone, Denman, and Deka in blackwall and wide whitewall styles. Confirm your model and exact size before selecting a tire.
These answers focus on how 1930 Stutz tire fitment splits between L6/L8 and Model M cars, how antique and numeric size codes relate to each other, and what to check for restoration accuracy, setup, road use, and long-term collector care.
Size Basics & Fitment
What tire sizes fit 1930 Stutz vehicles?
1930 Stutz vehicles use four sizes split across two model groups. The Stutz L6 and L8 use 31X6.00 and 600-19, both on 19-inch rims, while the Stutz M uses 32X6.20 and 650-20, both on 20-inch rims. Product-backed rim width guidance appears for 650-20 at 3.00 to 5.00 inches, and the available 1930 Stutz fitments in this year and make are all bias-ply tires.
That means year and make alone are not enough to choose correctly. A buyer should first identify whether the car is an L6/L8 or a Model M, then confirm whether the existing wheels and prior fitment history correspond to the antique diameter-based size or the numeric size used on that model. On a restoration candidate, that distinction often affects both appearance and authenticity.
What does 31X6.00 mean on a 1930 Stutz tire?
On a 1930 Stutz, 31X6.00 is an antique diameter-by-section size. The first number, 31, refers to the tire’s overall diameter in inches, while 6.00 is the nominal section width. That style of sizing predates the later numeric convention that highlights wheel diameter more directly, and on 1930 Stutz it applies to the L6 and L8 rather than the larger Model M.
Owners often encounter this code on older restorations, surviving wheels, or marque references from the period. If your Stutz L6 or L8 was set up around this earlier style of fitment, the important next step is to verify the actual 19-inch wheel and compare the car’s current configuration with trusted Stutz references or long-time restoration history before making a final size decision.
Do all 1930 Stutz models use the same tire size?
No, 1930 Stutz models do not all use the same tire size. The L6 and L8 share 31X6.00 and 600-19 on 19-inch wheels, while the Model M uses 32X6.20 and 650-20 on 20-inch wheels. Every size in the 1930 Stutz range is bias-ply, but the fitments divide clearly between those two model groups.
That split matters because a tire that is correct for a Stutz M is not simply an alternate choice for an L6 or L8. If the car’s model identity is uncertain, start there before looking at sidewall style or brand. Once the model is confirmed, the remaining task is to match the correct wheel diameter and period size convention rather than treating all 1930 Stutz cars as one fitment family.
Buying the Right Tire
What sidewall styles are available for 1930 Stutz tires?
Available sidewall styles for 1930 Stutz include both wide whitewall and blackwall, depending on size. The 600-19 offering is a wide whitewall, while 650-20 is available in both blackwall and wide whitewall forms. That gives Model M owners the broadest cosmetic range among the currently available 1930 Stutz fitments.
Sidewall choice changes the look of the car more than most buyers expect, especially on a large pre-war luxury automobile. Wide whitewalls usually suit a formal, fully dressed restoration theme, while blackwalls can look more restrained or more utilitarian depending on the body style and presentation. If the car will be judged, confirm what is appropriate for your market, coachwork style, and restoration objective before settling on appearance alone.
What brands make tires for 1930 Stutz vehicles?
Current 1930 Stutz coverage includes Lester, Firestone, Denman, and Deka. Lester appears in 600-19 for the L6 and L8, while Firestone, Denman, and Deka appear in 650-20 for the Model M. All of the available products for these 1930 Stutz fitments are bias-ply tires.
Brand choice on a car of this era often comes down to the look you want, the size your wheels require, and whether you need a blackwall or wide whitewall presentation. It is worth checking the exact size first, because the brand mix changes by fitment. A buyer comparing L6/L8 and Model M tires should think of brand selection as size-dependent rather than universal across the full 1930 Stutz lineup.
What is the difference between Firestone, Denman, and Deka in 650-20 for a 1930 Stutz?
In 650-20 for a 1930 Stutz, Firestone is offered in both wide whitewall and blackwall forms, while Denman and Deka are blackwall offerings. The Firestone examples list a 2120-pound maximum load at 60 psi and fit 3.00- to 5.00-inch rims; the Firestone whitewall version is listed at 33 pounds and the blackwall at 28 pounds. Denman and Deka are presented in classic truck-oriented bias-ply series, each listed at 32 pounds.
That means the practical differences are visual character and published supporting specs rather than a change in basic construction type. A Model M owner aiming for a more formal pre-war luxury look may gravitate toward the whitewall presentation, while a blackwall setup offers a more understated appearance. Wheel width and load needs should be checked against the specific product rather than assumed across every 650-20 option.
Fitting & Setup
What rim width do 1930 Stutz tires require?
Published rim width guidance appears for the 650-20 tires used on the 1930 Stutz M. Those products fit rims from 3.00 to 5.00 inches wide. The other 1930 Stutz sizes on this page do not all carry the same published wheel-width details, so the safest way to approach them is by confirming the actual wheel already on the car and comparing it to the intended tire’s specifications.
Rim width matters because two tires with the same nominal size can behave differently if mounted on wheels outside the maker’s approved range. On a pre-war Stutz, wheel originality and restoration history can also complicate assumptions. Before finalizing a tire, measure the wheel, confirm the rim diameter, and compare the product’s approved width range to the wheel rather than relying only on what another 1930 Stutz owner may be running.
Do 1930 Stutz tires require inner tubes?
The currently listed 1930 Stutz products do not carry mixed tube-type and tubeless markings within these fitments, and these pre-war bias-ply applications are generally handled in the traditional tube-era context. That is especially relevant on original-style wire or demountable wheel assemblies, where the wheel design itself often drives tube use as much as the tire does.
The right approach is to inspect the actual wheel construction before choosing supporting hardware. If the wheel was designed around tube use, the tube, flap, valve-stem fit, and overall wheel condition matter just as much as the tire size. A buyer working with restored or rebuilt wheels should treat tube selection as part of the full assembly, not as an afterthought once the tire size has already been chosen.
Can the original 1930 Stutz wheels be used with all 1930 Stutz tire sizes?
Original 1930 Stutz wheels cannot be treated as universal across the full model range because the cars do not all share the same rim diameter. L6 and L8 fitments are built around 19-inch tires, while the Model M uses 20-inch tires. That alone separates the wheel groups before any question of rim width or restoration variation enters the discussion.
Within a given model group, the antique and numeric sizes correspond to the same wheel diameter, but buyers should still confirm the exact wheel on the car before assuming interchangeability. Pre-war cars often passed through decades of repairs, replacement wheels, and older restorations. If originality matters, compare the wheel, hub, and surviving fitment history of your specific Stutz rather than assuming another body style or chassis used the same setup.
Maintenance, Storage & Longevity
How should I store a 1930 Stutz when the tires are fitted?
A 1930 Stutz should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can age sidewalls prematurely. Because 1930 Stutz fitments are bias-ply, long periods of static storage can also encourage flat-spotting more readily than many later radial applications. Clean floors, stable temperatures, and proper inflation all help reduce stress on the casing.
Moving the car periodically is helpful if it can be done safely, and some owners use stands during extended storage to reduce constant load on the tires. If the car remains on the ground, keep the tires properly inflated and avoid damp surfaces that can hold moisture against the rubber. Collector cars that sit for months at a time need tire care to be part of the storage plan, not just the engine and battery checklist.
How long do tires on a 1930 Stutz typically last?
Tires on a 1930 Stutz should be judged primarily by age and condition rather than by miles driven. On collector vehicles, a careful evaluation around the five- to seven-year point is sensible, and many owners begin seriously considering replacement as tires approach ten years from their manufacturing date. The DOT date code on the tire helps establish that timeline on modern reproduction products.
A Stutz that only goes to shows or occasional tours can still age its tires out before the tread looks worn. Sidewall cracking, hardening rubber, repeated pressure loss, and visible casing distortion are more meaningful warning signs than odometer use on a low-mileage antique car. If the tires came with the car and their age is uncertain, treat them conservatively until their date and condition are confirmed.
How often should tires on a 1930 Stutz be inspected?
Tires on a 1930 Stutz should be inspected before every drive, and they deserve a more thorough check before any long tour or club event. Look closely for sidewall cracking, cuts, bulges, uneven wear, embedded debris, and signs that the tire is no longer holding pressure consistently. On a pre-war fitment, valve stems and any tube-related components also deserve regular attention.
That inspection routine matters because an antique car may go weeks or months between outings, giving pressure loss or age-related deterioration time to develop unnoticed. A quick visual walk-around is not enough before a longer run. Put a gauge on every tire, inspect the spare as well, and address any irregularity while the car is still in the garage rather than discovering it after the Stutz is already on the road.
Restoration & Authenticity
What tires were originally fitted to the 1930 Stutz L6 & L8?
A 1930 Stutz L6 and L8 would have been fitted in the bias-ply era, and the fitments associated with those cars here are 31X6.00 and 600-19. That aligns with the period transition where some references and wheel setups still used the older diameter-by-section convention while others were identified by numeric size. No original-equipment brand should be assumed without chassis-specific or market-specific confirmation.
For a faithful restoration, the first goal is to confirm which of those two size conventions matches the actual wheels and the car’s restoration history. Surviving literature, long-term ownership records, and Stutz club expertise are especially valuable on a low-production luxury marque like this one. If the car will be judged, verify the expected size presentation and sidewall style for your particular body and market before making the final call.
Does correct tire fitment matter for showing a 1930 Stutz?
Correct tire fitment matters a great deal when showing a 1930 Stutz because judges and knowledgeable enthusiasts notice size, construction, and sidewall appearance quickly on a pre-war luxury car. A 19-inch L6 or L8 on a Model M’s 20-inch fitment, or a car wearing the wrong style for its restoration theme, would stand out immediately. Even within the correct diameter, the visual impact of blackwall versus wide whitewall can shape how authentic the car appears.
That does not mean every event uses identical standards, but the safest path is to match the car’s proper size family first and then choose a sidewall treatment that suits the period presentation you are aiming for. Marque clubs, concours rule books, and period photos are the best final arbiters. Getting the tire right helps the whole stance and proportion of a 1930 Stutz read correctly at a glance.
What is the difference between antique and numeric tire sizing on a 1930 Stutz?
On a 1930 Stutz, antique sizes such as 31X6.00 and 32X6.20 express overall diameter first and nominal section width second, while numeric sizes such as 600-19 and 650-20 emphasize nominal section width and wheel diameter. Both systems are period-correct naming conventions from the era, but they do not simply function as modern-style cosmetic aliases. They relate to how tires were identified during a transitional period in tire sizing practice.
For a restorer, the practical point is that the code on the tire should align with the car’s wheel setup and the historical direction of the restoration. Some owners prioritize the exact period language that appears in factory literature or surviving service references, while others are guided by the wheel currently fitted to the car. On a Stutz, using the right size family helps preserve both authenticity and visual proportion.
Safety & Road Use
Are 1930 Stutz tires safe for highway driving?
1930 Stutz tires can be used for highway driving when they are in good condition, correctly fitted, and operated within the tire’s published limits, but they remain bias-ply tires on a pre-war automobile. The listed 650-20 Firestone products include a maximum load rating of 2120 pounds at 60 psi, though no speed-symbol markings appear in the available 1930 Stutz fitments here. On a car of this age, overall mechanical condition often becomes the limiting factor before the tire does at ordinary road speeds.
A well-sorted Stutz still deserves conservative, era-aware driving habits. Brake condition, steering play, suspension wear, wheel integrity, and alignment all shape how secure the car feels at speed, especially compared with a later radial-era vehicle. Before sustained road use, inspect the tires carefully and think of them as one part of the total system rather than the only checkpoint standing between a garage queen and a touring car.
What inflation pressure should I use for 1930 Stutz tires?
Inflation pressure for a 1930 Stutz should begin with the vehicle’s factory guidance if that information is available, then be checked against the specific tire’s rated capacity and pressure information. Among the currently listed products, the 650-20 Firestone examples show 2120 pounds maximum load at 60 psi. That figure is a tire rating, not a universal pressure setting for every 1930 Stutz size or every use case.
The safest method is to avoid borrowing a pressure figure from one size and applying it across the whole range. L6 and L8 fitments should be treated separately from Model M fitments, and final pressure should reflect the actual tire, the wheel, the vehicle, and how the car is used. On an antique chassis, correct inflation affects ride quality, steering effort, and casing life, so it is worth confirming carefully rather than guessing.
What should I check before taking a 1930 Stutz on a longer drive?
Before taking a 1930 Stutz on a longer drive, inspect every tire for cracking, cuts, bulges, irregular wear, embedded debris, and stable inflation. Check valve stems carefully, and if the wheel assembly uses tube-era hardware, make sure that part of the setup is also in sound condition. The spare should be inspected with the same seriousness as the tires on the car, because a roadside failure is no time to discover the spare has aged out as well.
That tire check should be part of a larger pre-drive routine appropriate to a 1930 automobile. Wheel attachment, brakes, steering, lubrication, coolant, and fuel system reliability all matter on an older Stutz expected to cover real distance. If the car has been sitting, give yourself enough time for a short shakedown run close to home before committing to a tour, parade route, or club event farther away.
