1956 Studebaker Tire Fitment Guide

1956 Studebaker vehicles use four bias-ply tire sizes across the range: 640-15, 670-15, 710-15, and 7.10-15/6. The 640-15 size fits Flight Hawk and Champion applications, 670-15 fits Power Hawk and Commander plus Sky Hawk and President, 710-15 fits certain Classic and Golden Hawk-related applications, and 7.10-15/6 is used on certain Classic and Golden Hawk-related applications. All of these sizes mount on 15-inch rims.

Model identification matters more than year and make alone on a 1956 Studebaker because the tire size is tied to the specific car family. Where product specifications are published, rim-width ranges differ by size and even by brand, so it is smart to confirm both the exact model and the actual wheel width before settling on a tire.

A 640-15 marking on a 1956 Studebaker tire is a numeric bias-ply size. The 6.40 figure refers to the tire's nominal section width in inches, expressed without a decimal in the code, and the 15 identifies the wheel diameter in inches. On this Studebaker application, that size belongs to Flight Hawk and Champion models.

That matters because a 640-15 is not simply a styling variation of the larger Studebaker sizes used elsewhere in 1956. If your car is a Champion-based application, staying with the proper 640-15 size keeps the proportions and intended fitment in line with that model family instead of substituting a larger senior-car size.

No, 1956 Studebaker models do not all use the same tire size. The lineup is split among 640-15, 670-15, 710-15, and 7.10-15/6 applications, with different model groupings assigned to each. Even though every size here fits a 15-inch wheel, the width designation and model application change across the range.

That is why a buyer should identify the exact model family before getting focused on brand or whitewall width. A Champion or Flight Hawk owner should not assume the same tire used on a President, Commander, or Golden Hawk is correct simply because all of them are 1956 Studebakers with 15-inch wheels.

The right choice depends first on which 1956 Studebaker model application you have, because both sizes appear only on certain Classic and Golden Hawk-related fitments rather than across the entire lineup. Both are bias-ply 15-inch sizes, so the decision is not about switching from bias-ply to radial. It is about matching the size code and application that belongs to your specific car.

Once the model is confirmed, the follow-up decision is usually about how closely you want to mirror the period appearance of the car, including sidewall presentation where products exist. Owners pursuing a highly accurate restoration should stay with the exact size their application uses, while drivers sorting out a car with mixed parts should verify the wheel and existing tire markings before choosing between the two.

1956 Studebaker tires are available in several period-appropriate sidewall styles depending on size. The 710-15 offerings include blackwall and wide whitewall choices, 640-15 includes wide whitewall and narrow whitewall choices, and 670-15 includes blackwall and wide whitewall choices. Those differences let owners tailor the visual finish to the character of the specific car.

A broad whitewall generally suits the mid-1950s American look many restorers want on senior sedans and upscale hardtops, while blackwalls can be a better visual fit for plainer trim levels or a more restrained presentation. The best choice is the one that matches the car's market position, trim intent, and the level of originality you want to preserve.

Several brands cover 1956 Studebaker tire sizes. The 710-15 size is available from BFGoodrich and Firestone, 640-15 is available from BFGoodrich and Firestone, and 670-15 is available from Firestone, US Royal, Coker Classic, and Universal Vintage Tire. All listed offerings for these sizes are bias-ply products.

That variety gives Studebaker owners room to choose a tire that matches the look they want without moving away from the proper construction type for the era. Once the correct size is established, comparing brands often comes down to sidewall style, published rim-width compatibility, and whether you want a visual presentation that leans more formal, sporty, or understated.

Published rim-width ranges for 1956 Studebaker tires vary by size and by some brands within the same size. The listed 710-15 tires fit 5.00 to 5.50-inch rims, 640-15 tires fit either 4.00 to 4.50-inch or 4.50 to 5.00-inch rims depending on the product, and 670-15 tires fit either 4.50 to 5.00-inch or 5.00 to 6.00-inch rims depending on the product. Every size here uses a 15-inch rim diameter.

That means wheel width should be checked before ordering even when the model and tire size are correct. A size may be right for the car, but one brand's version can call for a slightly different rim-width range than another, especially in 640-15 and 670-15 where the published fitment windows are not identical across all products.

Original 1956 Studebaker wheels can only be shared across tire sizes to the extent that all listed tires use a 15-inch rim diameter. That confirms diameter compatibility, but it does not automatically make every 15-inch Studebaker wheel suitable for every tire size in the lineup. Published rim-width ranges differ among 640-15, 670-15, and 710-15 products.

A car that originally used a narrower Champion-family wheel should not be assumed to accept a larger senior-car tire just because the bead seat diameter matches. The practical move is to verify your wheel width and your model application together, then compare that wheel to the approved range for the exact tire you are considering.

A 1956 Studebaker should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, furnaces, and other ozone-producing equipment that can accelerate sidewall aging. Keeping the car on a clean surface, maintaining inflation, and rolling it occasionally helps reduce flat-spotting and stress on the casing. Bias-ply tires are especially prone to taking a temporary set when a collector car sits for long periods.

If the car will be parked for a full season or longer, many owners use tire cradles or place the vehicle on stands while still supporting the suspension appropriately. Even on a well-kept Studebaker, storage conditions often affect tire life more than mileage does, so the environment around the car matters just as much as the tread that remains on it.

Tires on a 1956 Studebaker should be judged more by age and condition than by miles traveled. A good collector-car rule is to begin evaluating tires closely once they are about five to seven years old and to treat roughly ten years as the point where replacement deserves serious consideration, even if the tread still looks usable. The DOT date code on the tire is the best starting point for age.

That approach is important because many restored Studebakers accumulate very low annual mileage, which can hide age-related hardening, cracking, and internal degradation. A lightly driven weekend car with old bias-ply tires may need replacement sooner than an owner expects simply because calendar age, storage history, and heat cycles have more influence than odometer use.

Tires on a 1956 Studebaker should be inspected before every drive and again before any extended outing. Look for sidewall cracking, cuts, bulges, irregular tread wear, and any sign that the tire is losing pressure between uses. The valve stems should also be checked closely, especially on a collector car that may sit for weeks between drives.

A quick pre-drive inspection is one of the easiest ways to avoid roadside trouble in an older car. On a Studebaker that spends time in storage, small issues can develop quietly, so catching pressure loss, weather-checking, or a damaged stem early is much safer than discovering it after the car has been brought back up to highway speed.

A 1956 Studebaker Classic would have been fitted with bias-ply tires, as that was still standard American passenger-car practice in the mid-1950s. Within the Classic applications covered here, the sizes shown are 7.10-15/6 and 710-15, both on 15-inch rims. That places the car firmly in the era when construction type, sidewall style, and exact size code all mattered to an authentic appearance.

Owners restoring a Classic for authenticity should confirm the exact body and model application before choosing between those two sizes, especially if the car has had wheels or running gear changed over the years. For show-level accuracy by market or trim, Studebaker marque clubs and factory literature are still the best way to verify the exact original presentation your specific car carried when new.

Correct tire fitment matters on a shown 1956 Studebaker because judges and knowledgeable enthusiasts often notice whether the car carries the right size family, the right construction type for the era, and an appropriate sidewall treatment. A Champion-based car wearing a larger senior-car size, or a 1950s Studebaker wearing a sidewall style that clashes with its original character, can stand out for the wrong reasons.

The closer the event is to concours-level authenticity, the more closely those details tend to be scrutinized. Owners should match the tire size to the exact model group first, then choose a blackwall, narrow whitewall, or wide whitewall presentation that aligns with the car's intended look and the standards of the event or club they plan to enter.

For a 1956 Studebaker, Firestone and BFGoodrich overlap in the 640-15 and 710-15 sizes, but they are not identical in presentation. In 710-15, both brands offer bias-ply tires with the same listed 1550-pound load at 32 psi, while BFGoodrich includes blackwall and wide whitewall options and Firestone includes blackwall in the listed products. In 640-15, both brands offer wide whitewall choices, and Firestone also includes a narrow whitewall version with a lower listed load figure than its wider-whitewall counterparts.

That makes the comparison less about broad mechanical differences and more about sidewall appearance, model application, and the published rim-width range for the exact tire. A restoration focused on a particular visual style may lead you one way, while a buyer working around an existing wheel width may prefer the product whose approved range better matches the wheel already on the car.

Properly maintained 1956 Studebaker tires can be suitable for normal road use when they are the correct size, in sound condition, and matched to the wheel they are designed for. The listed products here are bias-ply tires, so their handling feel will be true to the period rather than modern-radial in character. On a mid-1950s Studebaker, overall roadworthiness also depends heavily on brakes, steering, suspension condition, alignment, and how long the car has been sitting.

The practical takeaway is to think of the tires as one part of the system rather than the only safety variable. A fresh set of correctly fitted tires helps, but highway confidence in a 1956 Studebaker also comes from a thorough mechanical inspection, stable tracking, proper inflation, and realistic speed expectations for a collector car of this era.

The listed 1956 Studebaker tire products include rated load figures at 32 psi: 710-15 examples are shown at 1550 pounds at 32 psi, 640-15 examples at 1190 pounds at 32 psi or 970 pounds at 32 psi depending on the tire, and 670-15 examples at 1450 or 1550 pounds at 32 psi where load data is published. Those figures identify the tire's rated capacity point, not automatically the carmaker's recommended running pressure.

For actual use, start with the vehicle's original manual or factory guidance for the specific model, then compare that with the tire maker's recommendations for the reproduction tire you choose. Pressure should never be copied from one Studebaker size to another just because the cars share the same year or a 15-inch rim diameter.

Before taking a 1956 Studebaker on a longer drive, inspect each tire for cracking, cuts, bulges, embedded debris, and uneven wear, and make sure all four are holding pressure consistently. Check the valve stems, examine the spare, and confirm that the tire size on the car actually matches the model application you intend to run. A wheel-and-tire mismatch is worth correcting before any highway trip.

That tire inspection should be part of a broader old-car pre-drive routine that includes brakes, steering play, fluid levels, cooling system condition, and lights. Studebakers are durable cars when sorted, but age affects rubber, seals, and mechanical systems across the whole vehicle, so a careful once-over before departure is time well spent.