1938 Oldsmobile Tire Fitment Guide

1938 Oldsmobile vehicles use two different tire sizes depending on model. The 1938 Oldsmobile 6 Cyl. uses 650-16, while the 1938 Oldsmobile 8 Cyl. uses 700-16. Both are bias-ply sizes and both mount on 16-inch wheels. Where rim-width guidance is available, 650-16 products are approved for 4.50- to 5.00-inch rims, and 700-16 products are approved for 4.50- to 5.50-inch rims.

That means year and make alone are not enough to choose a tire for a 1938 Oldsmobile. You need to confirm whether the car is a six-cylinder or eight-cylinder model first, then match the size to the wheel on the car. After that, the choice usually comes down to brand and whether you want a blackwall or wide whitewall appearance.

On a 1938 Oldsmobile, 650-16 is a numeric bias-ply tire size. The 6.50 figure refers to the nominal section width, and the 16 indicates the wheel diameter in inches. This size belongs to the 1938 Oldsmobile 6 Cyl. models rather than the eight-cylinder cars, and it is offered in both blackwall and wide whitewall versions from several vintage-style brands.

A modern buyer should read 650-16 as a prewar sizing convention, not as a direct one-to-one metric equivalent. If you own a six-cylinder 1938 Oldsmobile and your car still uses original-style 16-inch wheels, this is the size family to focus on. From there, you can narrow your choice by appearance and by the rim-width range approved for the specific tire you are considering.

No, 1938 Oldsmobile models do not all use the same tire size. Six-cylinder cars use 650-16, while eight-cylinder cars use 700-16. Both sizes are bias-ply and both fit 16-inch rims, but they are not interchangeable as a general rule simply because the wheel diameter is the same.

The practical takeaway is that model identification matters before you compare brands or sidewall styles. If the car has been altered over the years, confirm the wheel width and the size already fitted before replacing anything. That extra step helps avoid ordering a tire meant for the other engine-series car in the 1938 Oldsmobile lineup.

1938 Oldsmobile tires are available in both blackwall and wide whitewall styles, depending on the size and brand you choose. In 650-16, blackwall and wide whitewall options are offered by brands including BFGoodrich, Coker Classic, Firestone, and Garfield. In 700-16, blackwall and wide whitewall choices are also available, with brands including Lester, Avon, BFGoodrich, and Firestone.

Sidewall style affects the visual character of a prewar Oldsmobile as much as the tire size itself. Blackwalls suit a simpler, more restrained presentation, while wide whitewalls create the more formal period look many collectors want on late-1930s American cars. If authenticity matters for a particular restoration, compare your car's trim level, period photos, and event standards before making the final choice.

Several brands offer tires for 1938 Oldsmobile vehicles. The 650-16 size is available from BFGoodrich, Coker Classic, Firestone, and Garfield. The 700-16 size is available from Lester, Avon, BFGoodrich, and Firestone. All of the listed options for these sizes are bias-ply tires aimed at vintage applications rather than modern replacement radials.

Brand choice usually comes down to the combination of size, sidewall style, and the look you want on the car. Some buyers choose a familiar historic American name for presentation value, while others focus on a specific tread or sidewall treatment. Once the correct size is established, comparing the brands within that size is the best way to narrow the selection for your 1938 Oldsmobile.

For a 1938 Oldsmobile, BFGoodrich and Firestone both offer bias-ply options in sizes used by the year's model range, but the details differ by size and sidewall treatment. In 650-16, both brands offer tires with a 1580-pound maximum load at 32 psi and approved 4.50- to 5.00-inch rim widths, with Firestone listed as a blackwall and BFGoodrich offered in a 3.75-inch whitewall version. In 700-16, BFGoodrich is listed at 1900 pounds at 36 psi with a 4.50- to 5.50-inch rim range, while Firestone appears as a 4.00-inch whitewall rated at 1800 pounds at 36 psi on the same rim-width range.

That makes the comparison less about broad brand claims and more about the exact product configuration. One may suit a blackwall presentation, while another better matches a whitewall restoration theme. Before choosing between them, match the brand to the correct tire size for your model and then compare the sidewall look, approved rim width, and published load-and-pressure specification for that exact tire.

1938 Oldsmobile tires fit 16-inch rims, but the approved rim-width range depends on the tire size. For 650-16, products are listed for 4.50- to 5.00-inch rim widths. For 700-16, products are listed for 4.50- to 5.50-inch rim widths. Those ranges apply to the tire itself, not automatically to every wheel that may have been installed on a car over the years.

If your 1938 Oldsmobile still wears original-style wheels, that range is a useful starting point. If the wheels have ever been changed, measure and verify before selecting a tire. Matching the tire to the actual wheel width helps preserve the intended profile and reduces the chance of fitment problems that come from mounting a vintage-size tire on an unsuitable rim.

Both 1938 Oldsmobile tire sizes mount on 16-inch wheels, so the rim diameter is shared across the six-cylinder and eight-cylinder fitments. That said, the approved rim-width ranges are not identical. The 650-16 size is tied to a 4.50- to 5.00-inch range where listed, while 700-16 extends to 4.50- to 5.50-inch rims.

A shared 16-inch diameter does not automatically make the two sizes interchangeable across all original wheels. If you are evaluating a wheel swap or correcting a previous owner's changes, confirm the wheel width before assuming either size is suitable. Keeping the six-cylinder and eight-cylinder cars on their proper size is usually the cleaner route for fitment and appearance.

A 1938 Oldsmobile should be stored in a cool, dry, dark space with the tires protected from direct sunlight, electric motors, welders, furnaces, and other ozone sources that age rubber. Keep the tires properly inflated during storage and move the car periodically so the same section of tread is not carrying the load for months at a time. Bias-ply tires are especially prone to temporary flat-spotting after long stationary periods.

If the car will sit for an extended season, many collectors also place it on tire cradles or stands to reduce stress on the casing. The goal is to preserve the tire's shape and sidewalls, not just the tread. A little attention during storage helps a prewar Oldsmobile feel smoother and more predictable when it returns to the road.

Tires on a 1938 Oldsmobile should be judged by age and condition more than by mileage, since many collector cars accumulate very few miles each year. A sensible rule is to begin close inspection around the five- to seven-year point and to treat about ten years as the stage where replacement deserves serious consideration, even if tread remains. The date code on the tire helps establish age.

That matters because rubber hardens and the casing ages even when the car is stored indoors and driven sparingly. A prewar Oldsmobile may seem fine on short local runs while the tires are quietly aging out. Watching the calendar as closely as the tread depth is one of the best ways to avoid surprises on a collector vehicle.

Tires on a 1938 Oldsmobile deserve a visual inspection before every drive and a more thorough check before any longer outing. Look for sidewall cracking, weathering, tread separation, bulges, embedded objects, irregular wear, and slow pressure loss. Because these are vintage-style bias-ply applications, valve stems and the overall bead area also deserve regular attention.

Frequent checks are especially important on a car that may sit for stretches and then be asked to cover more miles in a single day than it usually does in a month. A quick inspection takes only a few minutes and helps you catch age-related issues early. That routine is part of responsible stewardship for any 1938 Oldsmobile driven on public roads.

A 1938 Oldsmobile 6 Cyl. would have been fitted with a bias-ply tire when new, because that was the standard construction for American passenger cars in the late 1930s. The size associated with the 6 Cyl. model group is 650-16, mounted on a 16-inch wheel. Original-equipment brand could vary by market and supply, so the most dependable guide for a specific restoration is the car's surviving evidence and period Oldsmobile reference material.

For a restoration-minded owner, the important pieces are the correct size, correct bias-ply construction, and a sidewall style that suits the car's intended presentation. If the car will be judged, consult an Oldsmobile marque specialist or club source for market- and series-specific expectations. That helps keep the finished car visually convincing as well as mechanically appropriate.

Correct tire fitment matters on a 1938 Oldsmobile because show judging often looks at size, construction type, and sidewall appearance along with overall authenticity. A six-cylinder car wearing 700-16 tires or an eight-cylinder car wearing 650-16 tires can look visibly off, even before anyone studies the details. On a prewar American car, the difference between blackwall and wide whitewall presentation can also change the car's period character substantially.

The right tire does more than fill the wheel opening; it supports the stance and restoration story of the entire car. If you are building for formal judging, check the standards used by the event or the relevant Oldsmobile club before finalizing the tires. Event-specific expectations can be stricter than general enthusiast practice, especially on visible items like whitewall width and construction style.

For the 1938 Oldsmobile 6 Cyl., BFGoodrich and Firestone both offer 650-16 bias-ply tires with the same published maximum load of 1580 pounds at 32 psi and the same listed 4.50- to 5.00-inch approved rim-width range. The visible difference in the products shown here is the sidewall treatment: Firestone appears as a blackwall option, while BFGoodrich is offered as a 3.75-inch whitewall version. Their listed weights also differ slightly.

That makes the choice primarily a restoration and appearance decision rather than a basic fitment one. If your goal is a simpler, more understated prewar look, the blackwall presentation may suit the car better. If you want a more formal late-1930s American visual treatment, the whitewall version may better support that style while keeping the correct size and bias-ply construction.

1938 Oldsmobile tires can be suitable for highway use when they are the correct size, in sound condition, and used within the limits shown for the specific product. The listed 700-16 Avon tire carries an L speed rating, which corresponds to 75 mph. Other products in these sizes do not show a speed letter here, so the individual tire's sidewall marking should guide your expectations. On a prewar Oldsmobile, the car's brakes, steering, suspension, and overall mechanical condition are just as important as the tire itself.

Highway driving in a 1938 Oldsmobile should always be approached with the vehicle's era in mind. Even when a tire's rated capability appears adequate, long-distance comfort and control depend on the whole car being properly sorted. If you plan to use the car regularly beyond local roads, inspect the tires carefully and match your cruising speed to both the tire's published rating and the car's broader mechanical realities.

Inflation pressure for 1938 Oldsmobile tires should start with the vehicle's original factory recommendation, then be checked against the tire maker's published load-and-pressure information for the exact tire you are using. Among the products shown here, some 650-16 tires list 1580 pounds at 32 psi. In 700-16, examples include 1800 pounds at 36 psi and 1900 pounds at 36 psi, while another product lists 1,874 pounds without the same pressure format.

Those figures are tire ratings, not a universal setting for every 1938 Oldsmobile. Do not transfer a pressure from one size to the other or assume every brand within a size should be inflated the same way. The safest approach is to confirm the exact tire, then balance the vehicle recommendation with the tire maker's specifications so the car carries its load properly without guessing.

Before a longer drive in a 1938 Oldsmobile, inspect each tire for cracking, cuts, bulges, uneven wear, and signs of age-related hardening. Verify inflation pressure, check valve stems, and make sure the spare is usable and properly inflated as well. If the car has sat for a while, pay attention to any flat-spotting or vibration during the first miles and recheck the tires once they have warmed up.

Tires are only one part of the preparation on a car of this age, but they are one of the most visible and easiest places to start. A prewar Oldsmobile also deserves a broader mechanical check covering brakes, steering, cooling, and fluids before an extended outing. Starting with the tires gives you a solid first pass on roadworthiness and helps reveal whether the rest of the car is ready too.