1956 Buick Tire Fitment Guide

1956 Buick vehicles use three tire sizes: 710-15, 760-15, and 800-15. The 40 Special can use 710-15 or 760-15, the 50 Super uses 760-15, the 60 Century uses 760-15, and the 70 Roadmaster uses 800-15. All three sizes mount on 15-inch rims, but the listed rim-width ranges differ by size: 710-15 fits 5.00 to 5.50-inch rims, 760-15 fits 5.50 to 6.00-inch rims, and 800-15 fits 6.00 to 6.50-inch rims.

That means year and make alone are not enough for a correct choice on a 1956 Buick. You need to identify the model first, then confirm the wheel width before settling on a tire size. The Special deserves extra attention because it appears with two different sizes, while the Roadmaster stands alone with the largest size in the range.

On a 1956 Buick, 710-15 is a numeric bias-ply tire size. The 710 portion is the older nominal section-width code, and the 15 indicates a 15-inch rim diameter. For 1956 Buick applications, that size appears on the 40 Special and is offered in both blackwall and wide whitewall versions from brands such as BFGoodrich and Firestone.

A modern buyer should read 710-15 as an era-correct 1950s sizing system rather than as a direct metric measurement. It is not interchangeable by name with the larger Buick sizes simply because the rim diameter matches. On a Special, the important next step is confirming whether your car belongs with 710-15 or the larger 760-15 before choosing a sidewall style.

No, 1956 Buick models do not all use the same tire size. The 50 Super and 60 Century share 760-15, the 70 Roadmaster uses 800-15, and the 40 Special is the only series that appears with either 710-15 or 760-15. Every one of those sizes fits a 15-inch rim, but the tire width and approved rim-width range change from one size to another.

That variation reflects Buick’s stepped model lineup in 1956, from the more accessible Special up to the larger Roadmaster. A buyer comparing tires across the full year should treat the model badge as the first filter, not the second. Once the model is confirmed, the remaining choices come down to sidewall appearance and the details of the specific product you want to run.

For a 1956 Buick, that choice only applies to the 40 Special, because the Super and Century use 760-15 and the Roadmaster uses 800-15. Both 710-15 and 760-15 are bias-ply 15-inch sizes, so the issue is not bias-versus-radial construction here. The real question is which size belongs on your Special’s wheels and fits the car’s intended factory-style presentation.

A 710-15 Special should stay with 710-15 if the goal is correct size relationship and appearance, while a 760-15 Special should use 760-15 for the same reason. Since both are period-style bias-ply tires, the deciding factors are model-specific fitment, wheel width, and the whitewall or blackwall look you want. Checking the tire currently on the car and the wheel width is the cleanest way to avoid a mismatch.

1956 Buick tires are available in several sidewall styles depending on size. The 710-15 offerings include blackwall and wide whitewall choices, the 760-15 size includes narrow whitewall and wide whitewall versions, and the 800-15 Roadmaster size is available in wide whitewall form. That spread matches what many buyers expect for a mid-1950s American car, when whitewalls were a strong part of the overall look.

Wide whitewalls are usually the most visually aligned with an upscale 1956 Buick restoration, especially on Super, Century, and Roadmaster models. Blackwalls can still make sense for a more restrained presentation, and narrow whitewalls offer a different period flavor within the 760-15 size. Sidewall style does not change the basic fitment, but it can change the character of the car dramatically once mounted.

Several brands cover the 1956 Buick range. In 710-15, options include BFGoodrich and Firestone; in 760-15, choices include BFGoodrich, Coker Classic, and Universal Vintage Tire; and in 800-15, the listed offerings are from Coker Classic. All of them are bias-ply products in the sizes used across the 1956 Buick lineup.

Brand choice matters most after you have settled the correct size for your model. At that point, buyers usually compare the available sidewall treatment and any differences in listed load capacity, rim-width range, and overall presentation within the size they need. Sticking with the proper size first keeps the brand decision focused on product character rather than on correcting a fitment error later.

1956 Buick tire rim-width requirements vary by size. The 710-15 size is listed for 5.00 to 5.50-inch rims, 760-15 is listed for 5.50 to 6.00-inch rims, and 800-15 is listed for 6.00 to 6.50-inch rims. All three mount on 15-inch wheels, but the approved wheel width increases as the tire size steps up through the Buick range.

That is why a matching 15-inch wheel diameter alone is not enough to confirm a setup on a 1956 Buick. A Roadmaster tire should not be assumed correct for a Special wheel simply because both use 15-inch rims. Measuring or confirming the actual wheel width before mounting helps preserve proper tire shape, appearance, and fit on the car.

Original 1956 Buick wheels can share the same 15-inch rim diameter across the lineup, but that does not mean every original wheel is appropriate for every size. The three Buick sizes use different listed rim-width ranges, from 5.00 to 5.50 inches for 710-15, 5.50 to 6.00 inches for 760-15, and 6.00 to 6.50 inches for 800-15. Diameter compatibility is common here, while width compatibility still needs to be checked.

For a buyer working with original wheels, the practical takeaway is simple: confirm the wheel width before trying another Buick size from the same year. That matters most when moving between Special, Super/Century, and Roadmaster applications. Keeping the tire within its listed wheel-width range is the safest way to maintain the intended profile and avoid a combination that looks or fits incorrectly.

A stored 1956 Buick should be kept in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age rubber. Bias-ply tires, which are the sizes used across the 1956 Buick range, can develop flat spotting more readily when a car sits in one position for long periods. Clean floors, stable temperatures, and proper inflation all help reduce stress on the tires during storage.

If the car will sit for months, move it periodically or support it in a way that reduces continuous load on one contact patch. Tire covers can help in bright spaces, and a quick pressure check before and during storage is worthwhile. Good storage habits preserve both the appearance and road manners of a collector Buick, even if the car is only driven occasionally.

Tires on a 1956 Buick should be judged more by age and condition than by mileage. Collector cars often wear little tread, yet the rubber still ages, so a five-to-seven-year inspection mindset is sensible and replacement becomes a serious consideration as tires approach about ten years old. The DOT date code on the tire is the starting point for understanding age, even if the car has been driven sparingly.

A low-mile Buick that spends much of its time parked can still need tires sooner than an owner expects. Sidewall cracking, hardening, repeated air loss, and changes in ride feel matter more than an odometer reading on a hobby car. Age-based replacement planning is especially important on a 1950s bias-ply application because visual appearance alone does not always tell the whole story.

Tires on a 1956 Buick should be inspected before every drive, with a more thorough check before longer outings or touring events. Look for visible cracking, tread wear, cuts, bulges, embedded debris, and signs that the tire is losing pressure between drives. Since many collector cars sit for stretches, the inspection should also include checking for flat spotting and age-related sidewall changes.

A longer trip is the wrong time to discover a weak valve stem, an aging spare, or a tire that has begun to separate after years of light use. Building a pre-drive walkaround into your routine takes only a few minutes and catches most problems early. On an older Buick, that habit is just as important as checking fluids and brakes before heading onto modern roads.

A 1956 Buick 40 Special would have been a bias-ply tire car when new, which aligns with the 710-15 and 760-15 bias-ply sizes associated with that series. Mid-1950s American production Buicks were built in the bias-ply era, so construction type is straightforward even when exact market, body style, or wheel specification details vary. The remaining question for a Special is confirming which of the two listed sizes belongs on your particular car.

For restoration work, staying with the correct bias-ply construction preserves the period look and the way the tire fills the wheel opening. Sidewall treatment matters too, especially on a 1950s Buick where whitewalls were a major styling cue. If you are preparing for marque judging, use the car’s body-series details and consult Buick club resources to confirm the exact original presentation expected for your car.

Correct tire fitment does matter when showing a 1956 Buick, especially in judged restoration settings. Size, construction type, and sidewall style all affect whether the car looks right for its series and era. A Roadmaster on the wrong size, a Special wearing a size associated with another wheel-width range, or a sidewall treatment that clashes with the intended presentation can all stand out immediately.

Even outside formal concours judging, tire choice shapes the first impression of a 1956 Buick because the whitewall and overall tire proportion are such visible parts of 1950s styling. Choosing the proper size for the model and a sidewall look that fits the car’s intended finish level makes the restoration feel coherent. Event-specific rules can vary, so Buick marque clubs remain the best source for final judging expectations.

For the 1956 Buick 40 Special in 710-15, BFGoodrich and Firestone both offer bias-ply fitments, but their listed configurations differ. BFGoodrich appears in blackwall and wide whitewall versions, while Firestone is listed in blackwall form. Load rating is the same at 1550 pounds at 32 psi where specified, and the listed rim-width range is the same 5.00 to 5.50 inches, though product weights vary slightly by version.

That makes the comparison less about core fitment and more about presentation and brand preference within the correct size. If you want a wide whitewall in 710-15, BFGoodrich provides that route, while a more restrained blackwall look can be had from either brand. Because the basic application details align, the visible styling choice is likely to drive the decision more than the small spec differences.

1956 Buick tires can be suitable for highway use when they are the correct size, in good condition, and properly inflated, but all listed fitments here are bias-ply rather than modern radial designs. No speed rating letters are shown for these Buick sizes, so the emphasis should be on condition, pressure, age, and matching the tire to the correct wheel. On a 1956 Buick, the car’s brakes, steering, suspension, and overall mechanical state are often just as important to road confidence as the tires themselves.

Bias-ply tires deliver the authentic driving character expected of the period, but owners should remember they feel different from modern radial tires on crowned roads, grooves, and quick lane changes. A properly sorted Buick can still be enjoyable on today’s highways, provided the driver respects the age and design of the whole vehicle. Before sustained high-speed driving, inspect the tires carefully and make sure the rest of the chassis is equally ready.

For 1956 Buick tires, the tire listings show maximum load figures at 32 psi for some sizes: 710-15 is listed at 1550 pounds at 32 psi, 760-15 at 1710 pounds at 32 psi, and 800-15 at 1800 pounds at 32 psi. Those figures describe the tire’s rated load relationship at that pressure, not necessarily the exact running pressure Buick specified for every model. Factory recommendations should come from the owner’s manual or other Buick reference material for your specific series.

The practical approach is to treat the tire maker’s listed pressure and load figures as tire-capacity information, then set operating pressure according to the vehicle’s intended specification and how the car is actually used. Do not transfer a pressure assumption from one Buick size to another just because they all fit 15-inch rims. Getting this right affects ride quality, tread wear, and how authentically the car behaves on the road.

Before a longer drive in a 1956 Buick, inspect each tire for cracks, cuts, bulges, uneven wear, and any sign of impact damage. Confirm cold pressure, make sure the tires are holding air consistently, and check the spare as carefully as the four on the car. Because 1956 Buick applications here are all bias-ply, it is also wise to watch for storage flat spots if the car has been sitting.

A tire check should be part of a broader pre-trip routine that includes brakes, steering, suspension, wheel bearings, and fluid levels on a vehicle of this age. Long drives place more heat and continuous load into old-car systems than short local outings do. Catching a weak spare, a weathered sidewall, or a slowly leaking tire before departure can save a roadside interruption and protect the rest of the trip.