1966 Studebaker Wagons Tires

The 1966 Studebaker Wagons are associated with two primary tire sizes: 7.35-15 and 775-15. Both are bias-ply sizes built for 15-inch rims, and both are tied to the Base wagon configuration rather than one single universal modern metric size.

That means the first step is confirming which wheel and tire setup is actually on the car now. Many collector vehicles have had wheel changes over time, so the safest approach is to verify the rim diameter and present fitment before choosing a replacement tire, sidewall style, or a radial equivalent related to 775-15.

The tire sizes associated with the 1966 Studebaker Wagons both use a 15-inch rim diameter. That applies to 7.35-15 and 775-15, so the core fitment question is not rim diameter variation but which of those two bias-ply sizes matches the wagon’s actual setup.

Rim diameter is only one part of the fitment picture on a vintage wagon. It is also worth checking the wheel width and making sure the car still has the expected wheel package, especially if it has been stored for years or changed hands several times since its original service life.

A 775-15 is a numeric bias-ply tire size. The 775 refers to the tire’s nominal section width designation, and the 15 identifies the rim diameter in inches, so it is a traditional 15-inch bias-ply fitment for the 1966 Studebaker Wagons.

Understanding that format helps when comparing it with modern-looking radial alternatives, because the equivalent sizes use different naming systems such as 195R15 or P205/75R15. Even though the numbering style changes, the important next step is still checking wheel compatibility and the overall stance and clearance you want from the wagon.

On the 1966 Studebaker Wagons, 775-15 is a primary bias-ply tire size. The available products in that size are bias-ply tires, which makes it the traditional construction choice for buyers who want to stay close to the wagon’s period-style fitment and appearance.

That does not prevent a radial-equivalent comparison, but it does separate the original-style size from a construction change. Anyone considering that change should think about wheel width, the wagon’s current ride height and suspension condition, and whether preserving a more traditional look matters as much as the construction itself.

Radial equivalents for 775-15 include 195R15 as an 80-series metric radial, P205/75R15 as a 75-series P-metric radial, P215/70R15 as a 70-series P-metric radial, and 670R15 as a bias-look radial. These are alternatives to the original bias-ply sizing convention, not additional primary Studebaker factory fitments.

Each equivalent uses the same basic 15-inch wheel diameter family, but they are not interchangeable by assumption alone. The recommended rim-width range tied to those equivalents is 5-7 inches, and the wagon should also be checked for clearance, wheel fit, and the overall look you want before converting from bias-ply construction.

A 670R15 bias-look radial is available as a radial equivalent for the 775-15 size used on the 1966 Studebaker Wagons. That makes it a useful option for buyers who want radial construction while keeping a more traditional visual presentation than a modern P-metric tire usually provides.

Even with that appearance advantage, a bias-look radial should still be treated as an alternative rather than an automatic substitute. Checking the wheel width, overall fit on the car, and any suspension or steering-clearance issues is still important, especially on a wagon that may no longer sit on its original wheels.

Start with the basics: confirm that 775-15 is the size on your wagon and that the wheel is a 15-inch setup suited to the tire you are considering. From there, the main differences are construction consistency, rim-width specification, load rating, tire series, and the sidewall style that best suits the car’s purpose.

A restoration-minded owner may focus first on visual character, while a driver may spend more time comparing the available product specifications and whether a radial equivalent is worth considering. It also helps to look at the wagon as it sits today, since wheel changes or stance changes can influence which version of the size makes the most sense.

In 775-15, the 1966 Studebaker Wagons have access to a wide range of sidewall styles. Available choices include blackwall, narrow whitewall, redline, goldline, blue dot, and raised white letter blue streak styling, giving the wagon a very different personality depending on the tire selected.

That sidewall choice is often as important visually as the size itself on a collector car. A plain blackwall keeps the presentation understated, while whitewall, redline, or goldline treatments add more visual emphasis, so the right choice usually comes down to the wagon’s trim, restoration theme, and how authentic or custom the finished look should feel.

The available 775-15 tires for the 1966 Studebaker Wagons come from BFGoodrich, Firestone, and Goodyear. Those brands appear across several bias-ply series, including Silvertown Classic Bias Ply, Firestone Classic Bias Ply, Power Cushion, Speedway Blue Streak, and Power Cushion H.P.

Brand alone is only part of the decision on a vehicle like this. It makes more sense to compare the brand together with sidewall treatment, series character, rim-width specification, and the overall look you want, since each of those factors can shape whether the finished wagon looks understated, sporty, or more restoration-oriented.

For a period-style 1966 Studebaker Wagons, the natural starting point is one of the original-style bias-ply sizes associated with the model, either 7.35-15 or 775-15 depending on the wheel setup. Within 775-15, there are several bias-ply series and sidewall treatments that preserve a traditional vintage presentation.

The best appearance choice depends on how closely the wagon is being restored and what visual statement you want from the sidewall. If exact originality matters at a show level, it is wise to compare the tire choice against marque references, period photos, or other vehicle-specific historical material before settling on a brand or stripe treatment.

Tire construction can change the overall visual character of a restored 1966 Studebaker Wagons even when the wheel diameter stays the same. A traditional bias-ply tire preserves the older sizing language and period-style presentation, while a radial alternative may look more modern unless a bias-look radial is chosen.

That difference matters on a long-roof 1960s wagon because the tire is such a visible part of the car’s stance. Owners balancing restoration appearance with road use often compare standard bias-ply options first, then look at the 670R15 bias-look radial if they want a radial construction without moving as far away from the vintage visual theme.

Yes, modifications can affect tire fitment on a 1966 Studebaker Wagons even when the tire size itself is correct on paper. Aftermarket wheels, altered wheel width, suspension changes, lowering, or body repairs can all change the space available for a 7.35-15, 775-15, or a radial-equivalent alternative.

That is why a modified wagon should be checked as it sits rather than judged only by the original size reference. Steering clearance, fender clearance, and the actual wheel dimensions all matter, especially if the car has been rebuilt over time and no longer uses the same wheel and suspension combination it once carried.

Before putting a 1966 Studebaker Wagons back on the road with new tires, inspect the wheels, valve stems, and overall wheel condition, then confirm proper inflation and make sure the tires are seated correctly. It is also smart to look over suspension and steering components so the new tires are not being asked to compensate for worn hardware.

A short test drive should be followed by another visual check for any signs of rubbing, unusual wear, or air loss. On a collector wagon that may have spent long periods parked, the surrounding systems matter almost as much as the tires themselves, so roadworthiness should be judged as a complete package.

775-15 tires on a collector 1966 Studebaker Wagons should be kept at the proper pressure, inspected regularly for cuts, bulges, sidewall cracking, and uneven tread wear, and checked for air loss even during long storage periods. Collector cars often age their tires by time and environment as much as by mileage.

Storage habits matter on a low-use wagon. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, and it is a good idea to inspect them before every meaningful drive rather than assuming low mileage means they are automatically road-ready.