1926 Stutz Tire Fitment Guide

1926 Stutz vehicles in this guide use two tire sizes: 32X6.20 and 650-20, both applied to the 1926 Stutz 8 Cyl. Both sizes are bias-ply and both mount on 20-inch rims. For 650-20, listed products fit rim widths from 3.00 to 5.00 inches, while the 32X6.20 entry is presented as a fitment size without accompanying rim-width product detail here.

That means the main fitment question for a 1926 Stutz is not radial versus bias-ply, but which of the two period size designations belongs on your specific car and wheel set. If the car already has original-style wheels or surviving tires, compare the sidewall marking directly. If you are restoring from parts or mixed components, confirm the wheel dimensions and consult Stutz references or marque specialists before settling on one size.

On a 1926 Stutz, 32X6.20 is an antique diameter-by-section size. The first number, 32, refers to the tire's overall diameter in inches, while 6.20 refers to the nominal section width. That differs from later numeric sizing because the leading number is not the wheel diameter. The construction listed for 32X6.20 is bias-ply, which is fully consistent with a 1926 luxury-performance automobile.

That older format matters because modern buyers often misread the first number as a rim size, which would send them in the wrong direction immediately. When a 1926 Stutz carries an antique-style size code like this, treat it as a period designation that needs to be matched carefully to the actual wheel and intended restoration standard. It is especially important on pre-war cars where wheel and tire conventions changed more rapidly than they did in later decades.

On a 1926 Stutz, 650-20 is a numeric bias-ply size. The 6.50 figure represents the nominal section width, and the 20 identifies the rim diameter in inches. That means the wheel size is 20 inches even though the format looks quite different from 32X6.20 at first glance. Firestone, Denman, and Deka all appear in this size, with Blackwall and Wide Whitewall versions available.

This size is easier for many collectors to recognize because the wheel diameter is stated directly in the code. Even so, a 1926 Stutz owner should not assume that 650-20 and 32X6.20 are simply interchangeable labels without checking the actual wheel and the fitment history of the car. Numeric sizes like 650-20 are often chosen by owners who have verified that exact marking on the vehicle and want to stay within a period-correct bias-ply configuration.

1926 Stutz tires in the listed 650-20 size are available in both Blackwall and Wide Whitewall form. Firestone offers both styles in that size, while the Denman and Deka entries shown here are Blackwall tires. All of the listed choices are bias-ply, so the sidewall decision is mainly about appearance rather than a change in basic construction type.

For a 1926 Stutz, sidewall style can meaningfully change the car's visual character. A Wide Whitewall tends to emphasize formal, luxury-era presentation, while a Blackwall often feels more restrained and utilitarian. The right choice depends on how the car is being restored, the period image you want to present, and whether your event or marque standard expects a particular look. It is worth checking period photos and club guidance before committing to one style.

Three brands appear in the listed 1926 Stutz tire range: Firestone, Denman, and Deka. All of those products are shown in the 650-20 size, and all are bias-ply constructions. Firestone is represented with both Blackwall and Wide Whitewall offerings, while Denman and Deka are shown here in Blackwall form. The 32X6.20 fitment appears as a size entry without listed products in this group.

Brand choice on a pre-war Stutz often comes down to the balance between visual presentation and the kind of service the car sees. Some owners prioritize a sidewall style that suits a formal restoration, while others focus on finding a straightforward period-type casing in the correct size. Once the exact size is confirmed, compare the available brands by sidewall appearance, rim-width compatibility where listed, and any load or construction details that matter for your use.

Within the 650-20 size for 1926 Stutz, Firestone offers both a Blackwall and a 3.75-inch Wide Whitewall in its Classic Bias Ply line, and both listed Firestone versions carry a 2120-pound maximum load at 60 psi with a 3.00 to 5.00 inch rim-width range. The Firestone Blackwall is listed at 28 pounds, while the Firestone whitewall is 33 pounds. Denman Highway and Deka 650-20 products are also bias-ply blackwalls, each listed at 32 pounds, with 20-inch rim diameter shown.

Those differences make the comparison fairly straightforward. If appearance is the main priority, Firestone gives you the clearest sidewall choice in this size. If your focus is a simpler blackwall presentation, Denman, Deka, and Firestone all keep you in a period-style bias-ply category. Before choosing among them, confirm that the wheel falls within the tire's required dimensions when that information is listed, and decide whether whitewall styling belongs on your particular Stutz restoration.

For 1926 Stutz tires in the 650-20 size, the listed rim-width range is 3.00 to 5.00 inches on the Firestone products shown. All listed 650-20 tires mount on 20-inch rims. The 32X6.20 fitment is also tied to a 20-inch rim family, but no separate rim-width product detail is included here for that size.

Rim width matters because even when the diameter is correct, the tire still needs a wheel that supports its intended section width and sidewall shape. On an older car like a 1926 Stutz, wheels may have been changed, restored, or swapped over the decades. Measure the actual wheel before final selection, especially if the car has mixed parts history, and avoid assuming that every 20-inch Stutz rim automatically matches every 20-inch tire option.

The listed 1926 Stutz products do not carry tube-type or tubeless markings in the size field, so there is no year-wide tube status called out across the available 650-20 products here. On a car from 1926, bias-ply fitments of this type are commonly associated with tube-era wheel designs, especially if the car retains original-style detachable or demountable rims. That historical context makes tube compatibility an important setup question on a pre-war Stutz.

The practical step is to verify the wheel design rather than guessing from size alone. If your 1926 Stutz uses original-style wheels, consult the wheel configuration, the tire manufacturer's guidance for the exact product, and a pre-war specialist if needed. Tube choice, flap requirements, and valve-stem details can all affect how the assembly works in service, so it pays to sort that out before the tires are mounted.

Both listed tire sizes for 1926 Stutz use a 20-inch rim, so the wheel diameter is shared between 32X6.20 and 650-20. That makes it possible, in principle, for both sizes to belong to the same wheel-diameter family. Even so, wheel diameter alone does not settle the question because rim width, bead-seat design, and the exact period fitment still need to line up with the tire being chosen.

For an original-wheel car, that means you should confirm more than the stamped diameter before moving from one size convention to the other. Measure the wheel, compare it against the tire's stated rim requirements where available, and look for surviving sidewall markings or period records on the car itself. A 1926 Stutz restored from long-term ownership history may support that choice more confidently than a car assembled from mixed components.

A 1926 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 accelerate rubber aging. Keep the tires clean, maintain inflation, and move the car periodically so one area of the casing does not carry the load for months at a time. Bias-ply tires are especially prone to temporary flat-spotting during long static storage.

For longer layups, many collectors either roll the car occasionally or support it in a way that reduces sustained load without leaving the suspension hanging incorrectly. Storage habits matter as much as mileage on a low-use pre-war car. Good storage helps preserve sidewall appearance, keeps the tires rounder in service, and reduces the chance that a beautifully restored 1926 Stutz develops age-related cracking before the tread is truly worn.

Tires on a 1926 Stutz usually age out before they wear out, because collector vehicles often see limited annual mileage. A sensible rule is to inspect them closely once they reach the five- to seven-year range and to treat the ten-year point as a serious replacement consideration regardless of remaining tread depth. The DOT date code, where present on the tire, is the starting point for judging age.

Age matters more than miles because rubber hardens, casing materials fatigue, and old tires can look acceptable long after their service life has become questionable. A Stutz used mainly for tours, shows, and fair-weather outings still needs an age-based replacement mindset. If the car's restoration dates back many years, check the actual manufacturing date rather than relying on memory of when the car was completed.

Tires on a 1926 Stutz should be inspected before every drive and again before any longer outing or tour. Look for sidewall cracking, tread separation, cuts, bulges, uneven wear, and any loss of pressure. Because a pre-war car may use older wheel designs and period-style bias-ply fitments, it is also wise to examine valve stems, the spare, and any tube-related service items during routine checks.

Frequent inspection is especially important on a collector car that may sit for long stretches between outings. Problems often appear during storage rather than during active use, and they are easier to catch in the garage than on the roadside. Make tire inspection part of the broader pre-drive routine for a 1926 Stutz, alongside fluid checks, brake evaluation, and a quick look at steering and suspension hardware.

A 1926 Stutz 8 Cyl. would have originally used bias-ply tires, because that was the standard construction for American cars of the period. The sizes associated here with the model are 32X6.20 and 650-20, both of which fit the pre-war, 20-inch-rim context of a high-end Stutz. No original-equipment brand should be assumed from present-day replacement offerings alone.

For a restoration, the most accurate path is to confirm which of those two size designations belongs to your specific car, especially if it has a known body style, wheel history, or surviving original components. Market-specific variations, later wheel swaps, and restoration-era substitutions can all complicate the picture. Stutz club resources, period sales material, and unrestored-car references are the best places to confirm exact original fitment expectations.

Correct tire fitment matters a great deal when showing a 1926 Stutz, especially in venues that judge authenticity closely. Size designation, bias-ply construction, overall sidewall appearance, and the visual profile of the tire all influence whether the car reads as period-correct. On a pre-war American luxury-performance car, an obviously mismatched size or a sidewall treatment out of character with the restoration can stand out immediately.

That does not mean every event uses the same standard, but serious judging often pays attention to tires because they shape stance as much as any other visible chassis component. If your goal is formal competition, verify the expected size and sidewall style before mounting tires. A marque club or event rulebook can tell you whether a blackwall, a whitewall, or a specific size convention is the better match for your class.

For the 1926 Stutz in 650-20, the Firestone Classic Bias Ply line is available as both a Blackwall and a 3.75-inch Wide Whitewall. Both versions are bias-ply tires for 20-inch rims, both are listed with a 2120-pound maximum load at 60 psi, and both fit a 3.00 to 5.00 inch rim-width range. The blackwall is listed at 28 pounds, while the wide whitewall is 33 pounds.

That means the real distinction is visual character rather than a change in basic fitment class. A blackwall typically supports a more restrained, technical, or sporting presentation, while a wide whitewall pushes the car toward a more formal luxury look. On a 1926 Stutz, that appearance decision can significantly affect how the restoration is perceived, so period photos and club guidance are worth reviewing before you choose between the two.

The listed 1926 Stutz tires are bias-ply products, and no speed ratings are shown in the available size markings here. That does not automatically make them unsuitable for road use, but it does place the emphasis on proper size selection, sound condition, correct inflation, and realistic operation within the limits of a pre-war automobile. On a 1926 Stutz, the age and design of the car's brakes, steering, and suspension are often more limiting factors than pure tire capability at ordinary touring speeds.

Highway use should be approached with the mindset appropriate to a vintage Stutz rather than a modern car. A well-prepared example on fresh, properly fitted bias-ply tires can be enjoyable on public roads, but sustained high-speed running, emergency-lane-change expectations, and modern traffic pacing should be judged conservatively. If the car is newly restored or newly acquired, shorter shake-down drives are the best way to evaluate it before any extended trip.

Inflation pressure for a 1926 Stutz should begin with the vehicle's original guidance and then be cross-checked against the tire's own load-and-pressure limits. In the listed 650-20 Firestone products, the maximum load is 2120 pounds at 60 psi. That figure is a rated maximum for the tire, not a blanket instruction to run every 1926 Stutz tire at 60 psi under all conditions.

The right working pressure depends on the vehicle's weight distribution, the way the car is equipped, and the tire manufacturer's recommendations for that specific product. Pre-war cars can be sensitive to inflation because pressure affects steering effort, ride quality, and tread wear quite noticeably. Use the factory literature as your baseline where available, then confirm that your chosen tire's rated limits are respected rather than transferring one product's number to every size or brand.

Before taking a 1926 Stutz on a longer drive, inspect every tire for cracking, cuts, bulges, abnormal wear, and stable air pressure. Check the valve stems, confirm the spare is usable, and make sure the wheel hardware and rim condition are sound. Because this is a pre-war car on bias-ply tires, it is also wise to look for any signs that the car has sat long enough to develop flat-spotting or sidewall age damage.

Tires are only one part of the pre-trip checklist, but they are among the most visible and easiest to evaluate before leaving. A longer outing in a 1926 Stutz should also include a broader mechanical review of brakes, steering, cooling, and fuel delivery. Catching a tire issue in the garage is far easier than solving it on the roadside, especially when the car uses specialized vintage sizes and pre-war wheel hardware.