1926 Flint Tire Fitment Guide

1926 Flint vehicles use six sizes across three model lines. The 60 Series uses 30X5.77 and 30x5, the 80 Series uses 32X6.20 and 650-20, and the Flint Jr uses 30X5.25 and 5.25-20. All of those sizes are bias-ply fitments, and the listed available products in 650-20 mount on a 20-inch rim with a 3.00- to 5.00-inch rim-width range.

Model identification matters more than anything else on a 1926 Flint because the tire sizes are not shared across the full range. If you are working from an old casing, wheel, or restoration project with mixed parts, confirm whether the car is a 60 Series, 80 Series, or Flint Jr before treating any other 20-inch Flint tire as equivalent.

On a 1926 Flint, 30X5.77 is an antique diameter-by-section size. The first number refers to the tire’s overall diameter in inches, and the second number refers to the nominal section width in inches. On this year Flint, that size belongs to the 60 Series and represents an early bias-ply sizing system used before later numeric and alphanumeric conventions became common.

That matters because a 30X5.77 marking is describing the tire differently from a modern metric size or even a later numeric size like 650-20. When you see this kind of code on a 1926 Flint, focus on preserving the correct era-specific fitment logic and compare it carefully against the wheel and any surviving original tire markings before choosing a replacement path.

For a 1926 Flint, 650-20 is a numeric bias-ply size. The 6.50 figure is the nominal section width in inches, and the 20 is the rim diameter in inches. Within the 1926 Flint range, this size is associated with the 80 Series, and current offerings in that size include Firestone, Denman, and Deka bias-ply tires in both blackwall and wide whitewall styles.

Numeric sizes are more familiar to many collector-car owners because they remained common for years after the earliest diameter-by-section markings. If your 1926 Flint 80 Series is being fitted with 650-20 tires, use the wheel diameter and the tire’s sidewall marking as your starting point, then compare sidewall appearance and rim-width compatibility before making a final selection.

No. The 1926 Flint 60 Series, 80 Series, and Flint Jr each use their own tire sizes, even though all fall within the same year and make. The 60 Series uses 30X5.77 and 30x5, the 80 Series uses 32X6.20 and 650-20, and the Flint Jr uses 30X5.25 and 5.25-20.

That separation is important for restorers because it keeps a simple year-and-make search from being enough on its own. A tire that is correct for a 1926 Flint 80 Series should not automatically be treated as correct for a Flint Jr or 60 Series simply because the cars are close in age and all use 20-inch wheels.

Current sidewall style variety appears in the 1926 Flint 80 Series size 650-20, where blackwall and wide whitewall choices are available. Firestone offers both a blackwall and a 3.75-inch whitewall version in that size, while Denman and Deka appear as blackwall offerings. The other 1926 Flint sizes listed for the 60 Series and Flint Jr do not have active sidewall-style choices shown here.

For a pre-war American car like a 1926 Flint, sidewall style has a strong effect on the finished look of the restoration. Owners pursuing a stricter period appearance often compare whitewall width and overall presentation carefully, while drivers aiming for a simpler service replacement may prefer a blackwall look that still stays within an era-appropriate bias-ply format.

The available brand coverage for 1926 Flint fitments appears in size 650-20, where Firestone, Denman, and Deka all have bias-ply offerings. Firestone is represented in both blackwall and wide whitewall versions, while Denman and Deka are represented in blackwall form. No other 1926 Flint sizes on this page currently show active product choices.

Brand selection matters most if you are fitting a 1926 Flint 80 Series in 650-20, because that is where appearance and series style can be compared directly. If your car is a 60 Series or Flint Jr, the better first move is confirming the exact original-size path for the model before trying to make a brand decision.

For a 1926 Flint using 650-20 tires, Firestone appears in both blackwall and 3.75-inch whitewall versions within its Classic Bias Ply line, while Denman appears as a blackwall Highway-style bias-ply tire. The Firestone listings shown here include a 2120-pound maximum load rating at 60 psi and a 3.00- to 5.00-inch rim-width range, with listed weights of 28 pounds for the blackwall and 33 pounds for the whitewall version. The Denman listing is shown at 32 pounds.

That means the most visible practical difference is appearance, especially if whitewall presentation matters on your 1926 Flint 80 Series. Beyond that, compare the exact rim-width guidance and load information shown on the specific tire you are considering so the visual choice also matches the wheel and intended use of the car.

A specific rim-width range is shown for 1926 Flint tires in size 650-20, where the available Firestone products call for a 3.00- to 5.00-inch rim width on a 20-inch wheel. The other 1926 Flint sizes listed here do not carry a stated rim-width range within the current selection, so the clearest published wheel-width guidance on this page belongs to the 80 Series numeric size.

Rim width should be checked before ordering because a correct nominal tire size can still behave poorly if mounted on the wrong wheel. On a 1926 Flint, especially one that has been restored or reworked over many decades, it is smart to measure the actual wheel and compare it to the specific tire’s stated range instead of relying only on the badge or model name.

All six listed 1926 Flint tire sizes mount on 20-inch wheels, so the rim diameter is shared across the 60 Series, 80 Series, and Flint Jr. That common diameter does not mean every 20-inch Flint tire is interchangeable across the lineup, because the section widths and overall proportions differ by model and by size convention.

Original wheels can often stay part of the equation, but they still need to match the size family intended for your exact model. If you are working with a 1926 Flint that has swapped wheels, worn markings, or mixed restoration parts, verify both wheel width and the model-specific tire size before assuming any 20-inch casing will be a suitable fit.

A 1926 Flint should be stored clean, dry, and away from direct sunlight, electric motors, furnaces, welders, and other ozone sources that accelerate sidewall aging. Because every listed 1926 Flint fitment is bias-ply, long static periods can encourage temporary flat-spotting and make old casings feel harsher on the first miles after storage. Tire pressure should be checked during storage rather than forgotten until the next outing.

Collectors who leave a 1926 Flint parked for long stretches usually benefit from moving the car periodically or taking weight off the tires with properly placed stands when appropriate for the chassis. Good storage habits preserve appearance and reduce stress on century-old wheels, suspension parts, and valve hardware as much as they help the tire itself.

On a 1926 Flint, tire age matters more than mileage because collector cars often see light seasonal use. A sensible rule is to evaluate tires closely once they are around five to seven years old and to treat ten years as a serious replacement point even if tread remains. Date codes and visible condition together give a better picture than odometer distance on a pre-war car.

That approach is especially important on a 1926 Flint because many owners drive infrequently and may assume a nice-looking tire is still serviceable. Sidewall cracking, hardening, loss of pressure, or age beyond the comfortable window should move replacement higher on the list, even if the car is used mostly for local shows, tours, and occasional fair-weather drives.

Tires on a 1926 Flint should be inspected before every drive and again before any longer outing. Check sidewalls for cracking, cuts, bulges, and weathering, and look at tread for uneven wear or signs of separation. Pressure should be verified regularly because a lightly used pre-war car can sit long enough for a marginal tire or valve to lose air between drives.

A brief walk-around catches many of the issues that matter most on an older collector car. If your 1926 Flint has spent years in storage or has old wheels and hardware, include the spare in that inspection routine and look closely at valve stems, bead areas, and any signs that the tire has shifted or deteriorated since the last time the car was on the road.

A 1926 Flint 60 Series would have been fitted in the bias-ply era, and the listed model-specific sizes for that car are 30X5.77 and 30x5. Those antique diameter-by-section sizes are consistent with mid-1920s practice, when bias-ply construction was the standard form across American passenger cars. The exact original tire brand could vary by market, dealer, and surviving historical evidence, so size and construction are the first authenticity markers to get right.

For restoration work, that means the strongest starting point is matching the correct 60 Series size family before worrying about finer appearance details. If the car is being judged, consult Flint or Durant-related marque resources and period literature to confirm whether your particular body style or market version leaned toward one of the two listed 60 Series sizes.

Correct tire fitment matters a great deal when a 1926 Flint is judged for originality. On a pre-war car, judges and knowledgeable enthusiasts often notice whether the size convention, construction type, and sidewall treatment look appropriate for the year and model. A 60 Series, 80 Series, or Flint Jr wearing another model’s size can stand out just as quickly as a visibly modern-looking casing.

That does not mean every event uses identical standards, but it does mean tire choice is part of the car’s visual and historical presentation. Owners preparing a 1926 Flint for higher-level showing should compare the exact model-specific size, check whitewall style carefully where applicable, and use marque-club guidance to align with the judging expectations of the event.

The 1926 Flint lineup uses both antique diameter-by-section sizes such as 30X5.77, 32X6.20, and 30X5.25, and numeric sizes such as 650-20 and 5.25-20. Antique sizes express overall diameter and nominal section width, while numeric sizes express nominal section width and rim diameter. Both belong to the bias-ply world of the 1920s, but they describe the tire in different ways and are tied to specific Flint models.

For authenticity, the distinction matters because the marking style itself is part of the period look and fitment logic. If you are restoring a 1926 Flint, do not treat an antique size and a numeric size as interchangeable just because they share a 20-inch wheel diameter; the correct choice should follow the model and the historical sizing path used for that car.

1926 Flint tires can be suitable for road use when they are the correct size, in sound condition, and matched to appropriate wheels, but highway expectations should stay realistic for a pre-war bias-ply car. The listed available 650-20 products do not show modern speed-letter markings here, so safe use depends heavily on tire condition and on the limitations of the vehicle itself. On a 1926 automobile, braking, steering, suspension design, and overall road manners usually deserve as much attention as the tire.

That means a healthy 1926 Flint can be enjoyed on public roads, but it should be driven within the comfort zone of the car rather than to modern interstate-car standards. Before any sustained-speed use, make sure the tires are fresh enough, evenly inflated, and free of age-related damage, and make sure the rest of the chassis is equally ready for the trip.

Inflation pressure on a 1926 Flint should follow the tire maker’s rating for the exact product and the vehicle guidance for the specific model. In the available 650-20 listings, Firestone shows a maximum load of 2120 pounds at 60 psi, which is a tire rating rather than a universal instruction to run every 1926 Flint at that pressure. The other listed Flint sizes on this page do not carry a shared pressure figure that should be transferred across the board.

Use the manufacturer’s information for the exact tire you choose, then compare it with period vehicle recommendations and the way the car is actually used. On an older Flint, the right pressure balance affects ride quality, steering feel, and tread shape, so it is worth confirming the correct setting for your model and tire instead of assuming one number fits all six sizes.

Before a longer drive in a 1926 Flint, inspect each tire for cracking, cuts, bulges, exposed cord, and uneven wear, then confirm that all tires are holding the intended pressure. Look at the spare as well, because on a pre-war tour the spare may be as important as the four tires on the ground. Wheel fasteners, valve hardware, and the general condition of the wheel itself deserve attention along with the tire.

A longer outing also calls for a broader mechanical check that matches the age of the car. Even if the tires look good, make sure the Flint’s brakes, steering, cooling system, and wheel bearings are ready for sustained use, since dependable touring in a 1926 vehicle always depends on the entire chassis working together rather than the tire alone.