1950 Buick Tire Fitment Guide

1950 Buick vehicles use three tire sizes: 760-15, 800-15, and 820-15. The 40 Special and 50 Super use 760-15, the 70 Roadmaster uses 800-15, and the 79 Series uses 820-15. All three sizes mount on 15-inch wheels, but the listed rim-width ranges differ where product specifications are available. The 760-15 products shown fit 5.50- to 6.00-inch rims, while 800-15 and 820-15 products shown fit 6.00- to 6.50-inch rims.

That means a buyer starting with only “1950 Buick” should identify the exact model before choosing a tire. Buick’s lineup spanned from lighter, more accessible models to larger senior cars, and the tire size followed that hierarchy. Even though the wheel diameter stays at 15 inches throughout, the section width and approved rim-width range are not interchangeable across the whole line. Matching the car to the correct size first will narrow the right product family and sidewall look much faster.

On a 1950 Buick, 760-15 is a numeric bias-ply tire size. The 7.60 figure is the nominal section width expressed in inches, and the 15 is the wheel diameter in inches. This format belongs to the era before modern P-metric sizing became standard, so it does not read like a current radial size with millimeters and an aspect ratio. In the 1950 Buick range, 760-15 applies to the 40 Special and 50 Super.

A buyer seeing 760-15 should think of it as an era-correct postwar American bias-ply size rather than a modern tire code. That matters when comparing products, because appearance details such as narrow or wide whitewalls often shape the final choice as much as the size itself. It also means you should not substitute a larger Buick size simply because the wheel diameter matches. The 760-15 fitment belongs to Buick’s smaller 1950 series cars, so the model identification still leads the process.

No, 1950 Buick models do not all use the same tire size. The 40 Special and 50 Super share 760-15, the 70 Roadmaster uses 800-15, and the 79 Series uses 820-15. Every one of those tires is a 15-inch bias-ply fitment, but Buick scaled the width upward as the cars became larger and more prestigious within the lineup.

That distinction is important for anyone researching by year and make alone. A Special or Super owner can often begin with the shared 760-15 category, while a Roadmaster or 79 Series owner needs the larger model-specific size. Sidewall style is a separate decision from size, so first confirm the series designation on the car, then compare blackwall, narrow whitewall, or wide whitewall offerings within the correct size. That approach avoids mixing senior-car tire sizes into models that did not use them.

1950 Buick tires are available in several sidewall styles depending on size. The 760-15 size is offered in narrow whitewall and wide whitewall versions, 800-15 appears in wide whitewall form, and 820-15 is available as blackwall, narrow whitewall, and wide whitewall. All of these are bias-ply tires, so the visual decision is mainly about how formal or understated you want the finished car to look rather than choosing between different constructions.

For a 1950 Buick, whitewall width can strongly influence the period feel of the car. A wide whitewall usually suits a full postwar Buick restoration, especially on more upscale models, while a blackwall can make a car look more restrained and utilitarian. Narrow whitewalls sit between those two looks. If authenticity matters for judging or historical presentation, it is smart to compare your Buick’s trim level, body style, and intended restoration style with period photos or marque-club guidance before settling on the final sidewall treatment.

Several heritage-oriented brands offer tires for 1950 Buick vehicles, depending on the size. The 760-15 size is available from BFGoodrich, Coker Classic, and Universal Vintage Tire. The 800-15 size appears from Coker Classic, while 820-15 is offered by BFGoodrich, Firestone, and US Royal. All of them are bias-ply products suited to Buick’s 1950-era fitment conventions.

Brand choice on a collector Buick often comes down to the exact look you want within the correct size. Some owners prioritize a familiar legacy name on the sidewall, while others focus more on matching a preferred whitewall width or blackwall appearance. Since brand availability changes by size, a Roadmaster owner will not see the same brand spread as a Special owner. It makes sense to confirm the right Buick model first, then compare brands only within the tire size that belongs on that series.

For a 1950 Buick using 760-15 tires, BFGoodrich and Coker Classic both offer bias-ply fitments with wide whitewall versions carrying a listed load capacity of 1710 pounds at 32 psi and a rim-width range of 5.50 to 6.00 inches. The BFGoodrich line also includes a narrow whitewall option, while the Coker Classic entry shown is a wide whitewall. Listed weights are close as well, with the BFGoodrich examples at 26 pounds and the Coker Classic example at 25 pounds.

The practical difference is less about fitment and more about visual presentation within the correct 760-15 size. If you want a slimmer white stripe on a 40 Special or 50 Super, BFGoodrich gives you that look, while both brands cover the broader whitewall appearance many Buick restorations favor. Since the wheel fit and load figures are similar on the comparable wide whitewall versions, the choice usually comes down to brand preference and the exact period look you want on the car.

Rim-width guidance for 1950 Buick tires varies by size. The 760-15 products shown fit 5.50- to 6.00-inch rims, while both 800-15 and 820-15 products shown fit 6.00- to 6.50-inch rims. All three tire sizes use a 15-inch rim diameter, but the approved wheel width broadens as the tire size moves upward into Buick’s larger model lines.

That makes wheel measurement worthwhile before final selection, especially on a car that may have had wheels swapped during past restoration work. A 15-inch Buick wheel is only part of the story; the width still needs to suit the specific tire size. If your car is a Special or Super, the smaller width range for 760-15 matters. If it is a Roadmaster or 79 Series, the larger 800-15 or 820-15 fitments should be matched to wheels that fall within their wider approved range.

Original 1950 Buick wheels across this lineup share a 15-inch tire diameter, so the diameter itself is common to all three Buick tire sizes. That does not make the sizes interchangeable across every wheel, though, because the listed rim-width ranges differ. The 760-15 size is paired with 5.50- to 6.00-inch rims in the products shown, while 800-15 and 820-15 are paired with 6.00- to 6.50-inch rims.

In practice, a buyer should treat wheel diameter compatibility and wheel width compatibility as two separate checks. A Roadmaster or 79 Series owner should not assume a wheel from a Special is the right match simply because both are 15-inch wheels, and the reverse is also true. If the car’s wheel history is uncertain, measuring the wheel and comparing it with the intended tire’s approved range is the safest next step before mounting a new set.

A 1950 Buick should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing sources that can age the rubber. Tires should be kept clean and properly inflated, and the car should either be moved periodically or supported in a way that reduces long-term static loading. Because 1950 Buick fitments here are all bias-ply, flat-spotting during long stationary periods is a more familiar storage issue than many modern-car owners expect.

Collector cars often spend more time parked than driven, so storage habits matter as much as mileage. If your Buick sits for months at a time, a quick roll forward and backward every few weeks can help reduce set-in flat spots. When the car returns to the road, give the tires time to warm and round out before judging ride quality. Proper storage will also help preserve whitewalls, which can discolor more quickly if they sit against dirt, damp concrete, or strong sunlight.

Tire life on a 1950 Buick is usually better judged by age and condition than by miles alone, because many collector cars see limited annual use. A good rule is to evaluate tires closely once they reach the five- to seven-year range and to consider replacement as they approach about ten years from the DOT date code, even if tread wear is still modest. That guidance applies especially well to classic bias-ply tires that may age out before they wear out.

A low-mileage Buick can still have old, hardened tires that look acceptable at a glance but are no longer ideal for dependable road use. Sidewall cracking, changes in ride quality, recurring pressure loss, or visible distortion are stronger warning signs than tread depth on a hobby car. When in doubt, think of the tire as a time-sensitive component rather than a mileage-only component. The age check is simple, and it is one of the smartest maintenance habits for any infrequently driven 1950 Buick.

Tires on a 1950 Buick should be inspected before every drive, and again more carefully before any extended outing. Look for sidewall cracking, cuts, bulges, uneven tread wear, and signs of pressure loss. Since these are classic bias-ply sizes often used on collector cars, it is also wise to inspect the spare and to pay close attention to valve stems during routine checks.

Frequent inspection matters because a hobby Buick may sit long enough for small problems to develop unnoticed between drives. A short local cruise can reveal ride or handling changes, but a longer trip gives less room for error once the car is already on the road. Build the tire check into a broader pre-drive routine that includes fluid levels, brake feel, and lighting. On an older car, catching a tire issue early is usually easier and less disruptive than dealing with it after the drive begins.

A 1950 Buick 40 Special would have been fitted in the bias-ply era, and the size associated with the model here is 760-15. That aligns with Buick’s place in the early postwar American market, when bias-ply construction was standard equipment across domestic passenger cars. Original-equipment branding could vary by supplier and market practice, so the more reliable restoration anchor points are the correct size, period-correct construction, and an appropriate sidewall presentation for the car’s intended look.

For a restoration, that means beginning with 760-15 bias-ply fitment and then deciding whether your Buick should wear a narrow or wide whitewall based on the style you are recreating. Owners aiming for high-level authenticity often compare surviving factory photos, sales literature, and marque-club guidance before locking in the final sidewall treatment. That extra step is worthwhile because a 1950 Buick can look meaningfully different with the wrong whitewall proportion, even when the base tire size itself is correct.

Correct tire fitment matters quite a bit when showing a 1950 Buick, especially at events that emphasize authenticity. Judges and knowledgeable enthusiasts tend to notice whether the car carries the proper size for its model, whether the construction matches the era, and whether the sidewall style suits the way the car would have appeared in period. On a 1950 Buick, using the larger 800-15 or 820-15 sizes on a Special or Super would stand out just as much as an obviously modern-looking sidewall treatment.

Even outside formal judging, tires strongly shape the stance and visual balance of a postwar Buick. A carefully restored car can lose some of its period character if the tire proportions or whitewall look are off. Owners preparing for concours or marque-specific events should compare their chosen size and sidewall style against the standards used by that club or judging body. Event rules can differ, but accuracy in size, construction, and sidewall appearance is almost always part of the conversation.

For a 1950 Buick using 820-15 tires, the available difference is mainly visual rather than dimensional. BFGoodrich and Firestone offer blackwall versions, BFGoodrich offers a narrow whitewall version, and US Royal offers a wide whitewall version. The examples shown share the same 15-inch rim diameter, the same 6.00- to 6.50-inch rim-width range, and the same listed load capacity of 1920 pounds at 32 psi where that figure is provided.

That means the choice is about the character you want the senior Buick to project. A blackwall gives a more restrained, utilitarian look, while a wide whitewall emphasizes the formal luxury image many owners associate with Buick’s upper-end 1950 models. A narrow whitewall lands between those extremes. For a historically convincing restoration, the right answer often comes from period photographs, showroom literature, and the expectations of the judging group or Buick club you follow.

The 1950 Buick tires listed here are classic bias-ply designs, and they can be suitable for normal road use when they are the correct size, in good condition, properly mounted, and correctly inflated. No speed ratings are shown on these sizes, so the focus should stay on overall condition, load suitability, and the realities of a 1950 automobile. A postwar Buick’s brakes, steering feel, suspension condition, and general chassis setup are often as important to highway confidence as the tires themselves.

For a longer or faster drive, think in terms of the whole car rather than the tire alone. Bias-ply behavior is different from that of a modern radial, with more sensitivity to road crown and grooves and a different steering feel at speed. Drivers accustomed only to modern cars should expect that character and give the Buick time to communicate how it wants to be driven. Safe highway use starts with a sound mechanical car and fresh, correctly sized tires that match its original design assumptions.

Where pressure figures are listed, the 760-15 products shown carry a maximum load of 1710 pounds at 32 psi, the 800-15 products shown carry 1800 pounds at 32 psi, and the 820-15 products shown carry 1920 pounds at 32 psi. Those are tire load-and-pressure ratings, not blanket vehicle pressure recommendations for every 1950 Buick. Factory operating pressures for ride and handling should still be checked against Buick literature or trusted marque references for the exact model.

The key point is not to transfer one size’s number onto another simply because all three are 15-inch tires. Buick used different sizes across the lineup, and each one has its own rated relationship between pressure and load. Start with the model-specific guidance for the car, then compare that with the tire’s own limits and specifications. That approach preserves ride quality, keeps the contact patch working as intended, and avoids overinflating a vintage bias-ply tire just because a larger Buick size carries a higher rating.

Before a longer drive in a 1950 Buick, inspect every tire for cracking, cuts, bulges, unusual wear, and proper inflation. Check the valve stems, verify that the spare is usable, and make sure the tire size on the car matches the Buick model you are driving. Since these are bias-ply applications on a collector vehicle, a visual check should be paired with a short rolling assessment for any pull, thump, or flat-spot sensation after the car has been sitting.

Tires are only one part of a sensible pre-trip check on a seventy-plus-year-old Buick. Brakes, coolant, belts, charging system, and steering components deserve the same attention before a sustained drive. If the Buick has recently come out of storage, a few local miles can reveal problems before you commit to highway distance. Taking that extra time helps separate a pleasant vintage touring experience from the kind of preventable roadside interruption that starts with something simple being overlooked.