1950 Studebaker Champion Tires

The 1950 Studebaker Champion uses a 640-15 tire size. This is a vintage numeric bias-ply size, and it is the primary fitment for the covered Champion 6 Cyl. configuration on a 15-inch rim.

That means the first step is usually not choosing among several sizes, but selecting the right 640-15 tire style for the car. Blackwall, narrow whitewall, and wide whitewall versions are available, and radial equivalents also exist for buyers considering a construction change. Wheel width, overall tire dimensions, and body or suspension clearance should still be verified before moving away from the original bias-ply format.

The 1950 Studebaker Champion uses a 15-inch rim with its primary 640-15 tire size. That rim diameter is central to both the original bias-ply fitment and any radial-equivalent tire you may be considering.

Rim diameter alone does not settle the whole fitment question, especially on an older car that may have had wheels changed over the years. It is worth confirming the actual wheel width as well, since product specifications and radial-equivalent guidance can vary. A quick wheel check helps avoid choosing a tire that matches the diameter but is not well suited to the wheel or overall vehicle setup.

Yes. The covered 1950 Studebaker Champion 6 Cyl. uses the same 640-15 bias-ply tire size as the core vehicle fitment. That keeps the size question simple and makes tire selection more about construction and appearance than about sorting through multiple primary sizes.

Even with shared fitment, the right choice can still vary depending on how the car is being finished and driven. A wide whitewall creates a more formal period-style look, while a blackwall can suit a simpler presentation. If the car has replacement wheels or suspension changes, it still makes sense to confirm wheel width and clearances before selecting either a bias-ply tire or a radial equivalent.

For the 1950 Studebaker Champion, 640-15 is the primary bias-ply tire size. It reflects the traditional construction used on the car’s original-era fitment and is the main reference point for buyers who want to keep the Champion in its vintage sizing system.

That matters because a bias-ply tire influences both the car’s look and the kind of replacement choices available. Staying with 640-15 keeps the selection in classic bias-ply products, including blackwall and whitewall styles. Moving to a radial means choosing an equivalent size instead, then checking wheel width, tire dimensions, and clearance rather than assuming that matching the 15-inch rim diameter settles the fitment.

Radial equivalents for 640-15 include 175R15, P175/75R15, and P185/70R15. Those represent three different radial sizing approaches: an 80-series metric radial, a 75-series P-metric radial, and a 70-series P-metric radial.

Each of those sizes can be considered as an alternative to the original bias-ply tire, but they should not be treated as automatic replacements. The recommended rim-width range tied to these equivalents is 5 to 6 inches, so the actual wheel should be measured before conversion. Overall tire dimensions and clearance at the fenders and steering components also deserve a close look, especially on an older car with an unknown wheel history.

Start by confirming the wheel diameter and actual wheel width on the car, then compare the radial-equivalent size you are considering against the original 640-15 fitment. For this Champion, radial alternatives include 175R15, P175/75R15, and P185/70R15, with a recommended rim-width range of 5 to 6 inches.

A careful conversion check should also include steering clearance, fender clearance, suspension condition, and the car’s intended road use. Many collector vehicles have had wheels, springs, or ride height changed over time, and those changes can affect radial fitment. The goal is to treat the radial as an equivalent-size alternative that still needs verification, not as a guaranteed one-size swap.

The first consideration is staying with the correct primary size, which is 640-15 for the 1950 Studebaker Champion. From there, the real choices are construction, sidewall appearance, brand, tire series, and whether the wheel width matches the tire’s intended fitment range.

A buyer restoring the car for traditional presentation may focus on a bias-ply tire with the right blackwall or whitewall look, while a more road-use-oriented owner may also compare radial equivalents separately. Product details such as rim-width recommendations, load figures, and tire weight can help narrow the selection. Matching the tire to the car’s visual goal and actual wheel setup usually leads to the best decision.

Tires for the 1950 Studebaker Champion are available in blackwall, narrow whitewall, and wide whitewall styles within the 640-15 size. That gives owners several ways to shape the car’s finished look while remaining within the correct primary tire size.

Sidewall style is often one of the biggest visual decisions on an early-1950s car because it changes the whole presentation without changing the underlying fitment. A blackwall can feel more restrained, while a wide whitewall gives a stronger period-style statement. Since multiple whitewall widths are available, it helps to think about the car’s trim, wheel covers, and restoration direction before choosing a sidewall treatment.

Available 640-15 tires for the 1950 Studebaker Champion come from BFGoodrich, Firestone, Avon, and Excelsior. The assortment includes classic bias-ply offerings across several tire series and sidewall presentations rather than one single version of the size.

That variety makes brand part of the decision, but it should be weighed alongside sidewall style, tire series, and wheel compatibility. Some products focus on blackwall presentation, while others are offered with narrow or wide whitewalls. Reviewing the rim-width specification and load information for the exact tire under consideration is also worthwhile, especially if the car has non-original wheels or will see more regular road use.

A period-style starting point for a 1950 Studebaker Champion is the original-size 640-15 bias-ply tire. That keeps the car in its vintage sizing and construction format, which is usually the most natural foundation for preserving the look and stance associated with an early-1950s Studebaker.

From there, the choice often comes down to blackwall versus whitewall presentation and how formal or understated the finished car should appear. Buyers aiming for exact originality should compare tire details against marque-club guidance, period photography, or other vehicle-specific references. For many restorations, though, staying in the correct size and choosing an era-appropriate sidewall treatment gets very close to the intended visual effect.

Tire construction changes more than ride and handling; it also influences how a restored 1950 Studebaker Champion looks. A 640-15 bias-ply tire maintains the traditional form associated with the car’s original-era fitment, while a radial alternative can alter the visual character even when it stays close in overall size.

That is why restoration-minded owners often begin with the original bias-ply size before looking at other options. Sidewall design plays into the final result as well, especially when choosing between blackwall, narrow whitewall, and wide whitewall versions. For a car being judged closely, construction and sidewall style should be considered together rather than treated as separate cosmetic details.

Yes. Modifications can affect tire fitment on a 1950 Studebaker Champion even when the intended tire size is still 640-15 or a radial equivalent. Changes to wheel width, wheel offset, ride height, springs, or suspension components can all alter the space available around the tire.

That is especially important on older cars that may have changed hands several times and no longer wear their original wheels. A modified setup can influence steering clearance, fender clearance, and how a radial-equivalent size sits on the rim. Measuring the actual wheels and inspecting the car’s current suspension and body clearances helps prevent fitment surprises before new tires go into service.

Before driving a 1950 Studebaker Champion on new tires, inspect the wheels for the correct diameter and sound condition, then confirm lug hardware, valve stems, and inflation pressure. It is also wise to check that the tires clear the fenders and steering components throughout their travel and turning range.

A broader road-use inspection should include wheel bearings, brakes, suspension bushings, shocks, and any signs of looseness in the steering system. On a collector vehicle, those areas can matter just as much as the tires themselves after long storage. A short, careful test drive followed by another pressure and clearance check can reveal issues before regular driving begins.

640-15 tires on a collector 1950 Studebaker Champion should be maintained with regular pressure checks, visual inspections, and careful storage habits. Look for cracking, bulges, cuts, uneven wear, and gradual air loss, since collector cars often spend long periods parked and can age tires without putting many miles on them.

Good maintenance also means keeping the car away from prolonged heat, direct sunlight, standing moisture, and ozone sources such as running electric motors. Driving the car periodically can help avoid long-term flat spotting, but tire condition still matters more than tread depth alone on an older vehicle. Any sign of age-related deterioration deserves attention before the car is taken on the road.