1932 Buick Tire Fitment Guide

1932 Buick vehicles use three different tire sizes depending on the series. The 50 Series uses 550-18, the 60 Series uses 6.00-18, and both the 80 Series and 90 Series use 700-18. All of those sizes are bias-ply designs and mount on 18-inch rims, but they are not interchangeable across the full Buick range simply because the overall sizing changes by series.

That means a 1932 Buick owner should identify the series first, then confirm the wheel dimensions on the car before choosing a tire. Rim-width guidance also varies by size where product specifications are available, so the fact that all three use an 18-inch rim does not automatically make every wheel suitable for every tire size.

On a 1932 Buick, 550-18 is a numeric bias-ply size. The 5.50 designation refers to the nominal section width in the period sizing system, and the 18 indicates the tire fits an 18-inch wheel. For 1932 Buick applications, that size belongs to the 50 Series rather than to the larger series cars.

Modern buyers sometimes expect a more detailed code with aspect ratio and construction letter, but prewar numeric sizes are much simpler than later metric or radial markings. If your Buick is a 50 Series, 550-18 is the size family to focus on, and then the next decision becomes sidewall appearance and exact rim-width compatibility for the product you are considering.

No, 1932 Buick models do not all use the same tire size. The 50 Series uses 550-18, the 60 Series uses 6.00-18, and the 80 Series and 90 Series share 700-18. Buick's lineup was tiered by series in 1932, and the tire sizing followed that progression from lighter to more senior cars.

That difference matters because a buyer who only knows the car is a 1932 Buick can still end up looking at the wrong size. If the series badge, body tag, or ownership history is unclear, it is worth confirming the exact model before ordering tires so that the car's proportions, wheel match, and restoration accuracy all stay on the right track.

1932 Buick tires are available in several period-style sidewall treatments depending on size. In 550-18, blackwall, wide whitewall, and double-whitewall options are represented. In 700-18, blackwall, wide whitewall, and double-whitewall choices are also available. Those sidewall differences change the visual presentation of the car even when the basic size and bias-ply construction remain the same.

For a prewar Buick, sidewall choice can shape whether the car reads as more formal, more understated, or more show-oriented. Owners pursuing a very era-conscious restoration often compare period photos, club guidance, and the car's market presentation before deciding between blackwall and whitewall treatments, especially on the senior 80 and 90 Series models.

Several established vintage tire brands cover 1932 Buick applications. In 550-18, available brands include Excelsior, Firestone, and BFGoodrich. In 700-18, Firestone products are available. All listed examples for these Buick sizes use bias-ply construction, which matches the period of the cars.

Brand choice on a 1932 Buick usually comes down to the combination of the correct size, the sidewall look you want, and the product line that best fits the car's presentation. Some owners lean toward a particular historical name for visual or marque-correct reasons, while others prioritize the exact whitewall treatment that best suits their restoration.

For 1932 Buick applications in 700-18, Firestone Balloon and Firestone Classic Bias Ply products share the same size, 18-inch rim diameter, and listed maximum load figure of 1520 pounds at 36 psi. Firestone Balloon examples appear in blackwall, wide whitewall, and double-whitewall versions, with listed weights from 26 to 35 pounds, while the Firestone Classic Bias Ply blackwall example is listed at 29 pounds.

A Buick owner comparing those series is usually deciding between product character and appearance within the same basic fitment rather than choosing between two different sizes. Since the rim-width guidance shown for the 700-18 examples remains 3.75 to 4.00 inches, the practical next step is comparing the exact sidewall treatment and overall presentation you want for an 80 Series or 90 Series car.

Rim-width guidance for 1932 Buick tires varies by size. In 550-18, listed examples fit rims from 3.00 inches to 4.00 inches wide depending on the product, including 3.00, 3.25, and 4.00-inch listings. In 700-18, the listed fitment range is 3.75 to 4.00 inches. All of these tires mount on 18-inch rims, but width still needs to match the individual tire specification.

That is especially important on prewar wheels, where restorations, wheel swaps, or decades of service can leave a car with something other than its original setup. Measuring the actual wheel and matching it to the chosen tire's approved rim width is the safest way to avoid an avoidable mismatch in profile, bead seating, and overall appearance.

1932 Buick tires should be treated as tube-type applications unless the specific tire manufacturer states otherwise. The sizes used here are prewar bias-ply designs in traditional numeric formats, and that style of fitment commonly operates with tubes on original-style wheels. The exact tube pairing should match both the tire size and the wheel being used.

A 1932 Buick owner should confirm tube requirements before final installation rather than assuming every 18-inch vintage tire is handled the same way. Tube condition, flap needs where applicable, and valve-stem fit at the wheel all deserve attention, especially if the car is being returned to the road after long storage or a restoration.

Original 1932 Buick wheels share 18-inch tire diameter across the series covered here, so the rim diameter itself aligns with 550-18, 6.00-18, and 700-18. That does not mean every original Buick wheel is automatically correct for every size, because the series-specific tire widths differ and the listed rim-width guidance also changes by tire size.

A 50 Series owner should stay with the wheel and tire combination appropriate to 550-18, while 80 Series and 90 Series owners should confirm their wheels are suitable for 700-18 dimensions. If a car has replacement wheels, a mixed set, or uncertain restoration history, wheel measurement is a better guide than assumption.

A stored 1932 Buick benefits from a cool, dry environment away from direct sunlight, electric motors, furnaces, welders, and other ozone-producing equipment that can age rubber. Bias-ply tires also tend to flat-spot more readily than radials during long stationary periods, so keeping the car clean, properly inflated, and moved occasionally helps reduce stress on the carcass and sidewalls.

Many collectors either roll the car slightly from time to time or use properly placed stands to reduce sustained load during long-term storage. The goal is to protect the tire from environmental aging as much as from mileage, because prewar collector cars often spend far more time parked than they do covering road miles.

Tires on a 1932 Buick are usually evaluated more by age than by mileage. A collector tire should be inspected regularly after about five to seven years of service, and replacement deserves serious consideration as it approaches roughly ten years from its date of manufacture, even if tread wear still looks modest. The DOT date code on the tire is the starting point for that age check.

That timeline matters because a low-use prewar Buick can still have old-looking tires that seem serviceable at a glance. Rubber hardening, internal aging, and sidewall cracking do not always appear in proportion to miles driven, so age-based maintenance is often more realistic than waiting for obvious tread wear to dictate replacement.

Tires on a 1932 Buick should be inspected before every drive and again before any longer outing. Look closely for sidewall cracking, tread separation, cuts, bulges, irregular wear, and pressure loss. On a car using tube-type vintage tire fitment, valve stems and any signs of slow leakage deserve the same attention as the visible tread and sidewalls.

That routine is especially important on a collector Buick that may sit for weeks or months between drives. A quick walk-around is useful, but an occasional hands-on inspection with a pressure gauge gives a much better sense of the tire's true condition before the car is asked to handle sustained road speeds or extended distance.

A 1932 Buick 50 Series would originally have used a bias-ply tire in the 550-18 size family, which matches the standard construction and sizing practice of the early 1930s. The broader 1932 Buick range then stepped upward to 6.00-18 on the 60 Series and 700-18 on the 80 and 90 Series. Original-equipment branding could vary by market and delivery context, so the most dependable starting point is the correct size and period-correct bias-ply construction.

For a restoration, that means focusing first on the proper series-specific size, then choosing a sidewall style that fits the character of the car and the standards of the event where it may be shown. Owners seeking absolute delivery-day accuracy often compare factory literature and Buick marque-club guidance before settling on the final presentation.

Correct tire fitment matters a great deal when a 1932 Buick is judged for authenticity. Judges and knowledgeable enthusiasts often notice whether the size matches the correct series, whether the construction reflects the period, and whether the sidewall style suits the car's era and presentation. A 50 Series wearing a larger senior-series size, for example, can look wrong even to a casual observer.

For event preparation, tire choice is about more than simply filling the wheel opening. Sidewall treatment, stance, and size correctness all shape how authentically the car presents, so owners often verify the expected standard with Buick clubs or the sanctioning body before a serious concours or preservation judging event.

In 1932 Buick 550-18 fitment, Firestone and BFGoodrich offerings differ in sidewall treatment, listed rim width, weight, and published load figures. The Firestone blackwall example is rated at 1125 pounds at 32 psi with a 3.25-inch rim listing and a 19-pound weight, while the Firestone double-whitewall version shares the same load rating with a 23-pound weight. The BFGoodrich 3.00-inch whitewall example is rated at 1000 pounds at 32 psi, fits a 3.00-inch rim, and is listed at 23 pounds.

Those differences matter most when a restoration has a very specific visual goal or when the wheel width on the car points naturally toward one product specification over another. A 1932 Buick 50 Series owner comparing them should think in terms of appearance, wheel match, and the exact product's published characteristics rather than assuming every 550-18 tire is identical.

1932 Buick tires can be suitable for highway use when they are the correct size, in sound condition, properly inflated, and matched to the wheel they are intended to fit. The tires covered here are bias-ply vintage-style products, so they should be driven with the handling expectations appropriate to a prewar car. On a 1932 Buick, the condition of the suspension, steering, brakes, and wheels is often just as important to real-world safety as the tire itself.

That means highway use should be approached with mechanical sympathy rather than modern-car assumptions. If the Buick has been freshly restored or has sat for long periods, a careful inspection and a few shorter shakedown drives are wise before any longer trip, even when the tires themselves are new.

Inflation pressure on a 1932 Buick should be set with the vehicle manufacturer's recommendation in mind while respecting the rating printed for the specific tire. In the available listings, 550-18 examples show load ratings of 1000 to 1125 pounds at 32 psi, while 700-18 examples show 1520 pounds at 36 psi. Those figures are tire ratings, not universal inflation instructions for every 1932 Buick application.

The best practice is to consult the original Buick owner's literature or trusted marque guidance for the car's intended operating pressure, then confirm that your chosen reproduction tire is being used within its published limits. Pressure should never be borrowed from a different size simply because the tires all fit 18-inch wheels.

Before a longer drive in a 1932 Buick, inspect each tire for cracking, cuts, bulges, uneven wear, and pressure loss, and include the spare in that check. On tube-type vintage fitments, valve stems deserve a close look as well. Tires are only one part of the preparation, so wheel fasteners, brake function, steering play, cooling condition, and fluid levels should also be reviewed on a car of this age.

A prewar Buick rewards thoroughness more than haste. Even when the tires look good, an overlooked stem, an underinflated spare, or a wheel that has not been checked since storage can turn a pleasant outing into a preventable roadside problem, so a careful pre-drive routine pays off every time.