1946 Studebaker Tire Fitment Guide

1946 Studebaker vehicles covered here use one tire size: 550-16, and it applies to the Champion. That size mounts on a 16-inch wheel, and the available products include fitments intended for rim widths from 3.25 to 4.00 inches where that range is specified. Because there is only one listed size for the year and make combination here, the basic fitment question is simpler than it is on many later collector vehicles.

The practical takeaway is that most buyers do not need to compare multiple sizes for a 1946 Studebaker Champion. Instead, the important checks are whether the car still has the correct 16-inch wheels, whether the wheel width falls within the tire maker's approved range, and whether you want a blackwall or wide whitewall appearance before making a final selection.

On a 1946 Studebaker, 550-16 is a traditional numeric bias-ply size. The 5.50 refers to the tire's nominal section width in inches, while the 16 identifies the wheel diameter in inches. Unlike modern metric radial sizing, it does not spell out an aspect ratio in the code, and the construction itself is bias-ply rather than radial.

That matters because a 550-16 tire should be judged by period sizing conventions, not by modern passenger-car measurements alone. If you are replacing old tires on a 1946 Studebaker Champion, use the size code as your starting point, then confirm the actual wheel diameter and approved rim-width range so the tire you choose matches both the car's original type of fitment and the wheel it will be mounted on.

Within the 1946 Studebaker coverage here, yes. The Champion uses 550-16, and no alternate size is listed alongside it. That means there is no split within this year-and-make grouping between different body styles or model families in the way buyers sometimes see on larger makes with separate junior and senior chassis.

For a buyer, that simplifies the research process considerably. You still want to verify that your car is in fact a 1946 Studebaker Champion and that it has not been changed to a different wheel setup over the years, but once those basics are confirmed, the remaining choice is mostly about tire brand, sidewall style, and how original you want the finished look to be.

1946 Studebaker tires in 550-16 are available in both blackwall and wide whitewall styles. Blackwall offerings appear from Excelsior and Avon, while wide whitewall options are offered by BFGoodrich and Firestone. All of them remain within the same basic bias-ply fitment, so the visual treatment is the major difference a buyer sees at first glance.

The choice depends on the look you want the car to present. A blackwall tire gives a plainer, more utilitarian appearance that suits a restrained postwar driver, while a wide whitewall typically delivers the stronger period visual statement many restorers expect from a late-1940s American car. If show appearance matters to you, compare the whitewall width and overall look to period photos of similar 1946 Studebaker Champion cars.

Four brands offer tires in the 550-16 size used on 1946 Studebaker vehicles here: Excelsior, Avon, BFGoodrich, and Firestone. Each is offered as a bias-ply tire, but the sidewall presentation differs by product. Excelsior and Avon cover blackwall choices, while BFGoodrich and Firestone provide wide whitewall options for a more formal late-1940s appearance.

That brand spread gives you room to choose for style as much as fitment. A buyer focused on a conservative driving appearance may lean toward a blackwall, while a restoration owner trying to capture a stronger postwar American look will usually spend more time comparing the whitewall options. Since all of them share the same basic 550-16 sizing, brand selection is largely about visual preference and product character within that original-type construction.

For a 1946 Studebaker, the Avon Tourist 550-16 80L and the Firestone 550-16 are both bias-ply tires in the correct size, but they differ in presentation and published markings. The Avon is a blackwall and carries a listed maximum load capacity of 992 pounds, while the Firestone is a wide whitewall with a listed maximum load of 840 pounds at 32 psi. The Firestone also lists a 3.25 to 4.00 inch rim-width range.

That makes the decision less about overall fitment and more about the kind of car you are building. The Avon suits owners who want a simpler blackwall look with its own marked load figure, while the Firestone suits owners chasing a classic whitewall appearance associated with many restored postwar American cars. Compare the wheel width on your car and the visual goal of the finished vehicle before deciding between them.

1946 Studebaker tires in 550-16 are built for 16-inch wheels, and where rim-width guidance is specified, the approved range is 3.25 to 4.00 inches. That range appears on the Excelsior and Firestone products in this fitment. Keeping the wheel within the listed range is important because a vintage tire's shape and footprint depend heavily on correct rim width.

An overly narrow or overly wide wheel can change how the tire sits, which affects both appearance and road manners on a postwar car. Before selecting a tire for a 1946 Studebaker Champion, measure the actual wheel rather than relying on memory or past owner descriptions. That one step helps avoid fitment surprises and is especially useful if the car has been apart for restoration or has mixed spare wheels.

The available 550-16 tires for 1946 Studebaker are bias-ply products, and the setup should be confirmed against the specific tire and wheel combination you plan to use. On many postwar original-type wheels, tube use is part of the normal vintage setup conversation, especially when working with older rims or restoration-grade wheel hardware. The tire itself is only one part of that decision.

The practical approach is to inspect the condition and design of the wheel before mounting anything. If the wheel is an original-style rim, a marque specialist or experienced vintage tire installer can help determine whether tube service is appropriate for your 1946 Studebaker Champion and which valve-stem details should be checked at the same time. That is worth settling before final assembly, not after the car is back on the road.

A 1946 Studebaker should be stored in a cool, dry space away from direct sunlight, electric motors, welders, furnaces, and other ozone sources that can age rubber. Bias-ply tires also tend to develop flat-spotting more readily when a collector car sits in one position for long stretches. Keeping the car on a clean surface and maintaining proper inflation during storage helps protect both the casing and the sidewall.

Owners who store a 1946 Studebaker Champion for months at a time should either move the car periodically or support it in a way that reduces prolonged stress on the tires. If you leave the car resting on its tires, rolling it a short distance every few weeks helps change the footprint. A breathable indoor cover and regular pressure checks are more helpful than sealing the car into a damp environment.

On a collector car like a 1946 Studebaker, tire age is usually more important than mileage. Many vintage-car owners start evaluating tires closely at around five to seven years of service, and around ten years is a common point for serious replacement consideration even if tread remains. The DOT date code, along with visible condition, is the best guide to the tire's age.

A lightly driven 1946 Studebaker Champion can trick owners into thinking old tires are still fine because the tread looks fresh. Rubber hardens and ages even when the car is only used for shows, local drives, or parade duty. If the sidewalls show cracking, the ride has become unusually harsh, or the tires' age is unclear, treat replacement as part of routine collector-car stewardship rather than waiting for mileage to accumulate.

Tires on a 1946 Studebaker should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, uneven wear, low pressure, and anything lodged in the tread. On a postwar car that may sit for long periods, even a short local trip deserves a quick visual check because age-related issues often appear before tread wear does.

A more thorough inspection several times a season is smart for a 1946 Studebaker Champion, especially if the car spends months in storage between events. Check the spare as well, and pay attention to valve stems and wheel condition while the car is stationary in the garage. Catching a slow leak or a deteriorating sidewall at home is far better than discovering it after the car has warmed up on the road.

A 1946 Studebaker Champion belongs to an era when bias-ply construction was the expected original-type tire format, and the size used here is 550-16. That makes today's 550-16 bias-ply offerings the right general type for maintaining an authentic postwar look. Original equipment branding could vary by market, dealer supply, and period replacement history, so construction, size, and sidewall appearance are usually the more dependable authenticity markers.

If you are restoring a 1946 Studebaker Champion for accuracy, start with the correct 550-16 size and then compare blackwall versus whitewall presentation to period photos, sales literature, and club guidance. Marque clubs and model-specific judges can help refine what is most appropriate for your car's body style and intended showing level. That approach keeps the restoration grounded in period practice without relying on assumptions about one exact brand.

Correct tire fitment matters on a 1946 Studebaker because judges and knowledgeable enthusiasts often notice tire size, construction type, and sidewall treatment immediately. A 550-16 bias-ply tire aligns with the period and the listed fitment for the Champion, while a visibly modern construction or an out-of-era sidewall look can distract from an otherwise careful restoration. Tires have a strong effect on stance and first impression.

That does not mean every event uses the same standard, but originality-minded judging usually rewards era-appropriate choices. If your goal is serious show presentation, decide early whether your 1946 Studebaker Champion should wear blackwalls or wide whitewalls and verify that choice against the event's style expectations. Marque clubs, judging manuals, and period photography remain the best tie-breakers when two visually plausible options are both available in the correct size.

For a 1946 Studebaker in 550-16, both BFGoodrich and Firestone offer wide whitewall bias-ply tires, so the key similarity is that each supports a strong period-correct visual style. The Firestone is listed with a 2.50-inch whitewall and includes a published maximum load of 840 pounds at 32 psi, while the BFGoodrich is listed as a 2.25-inch whitewall. Both fit within the same basic size family for the Champion.

The visual distinction between a 2.25-inch and 2.50-inch whitewall can matter quite a bit on a late-1940s restoration, especially when the car's trim and paint scheme put the wheel openings in clear view. If authenticity and overall appearance are your priorities, compare the whitewall width to period images of restored 1946 Studebaker Champion cars and then confirm that the wheel itself is suitable for the tire you choose.

A properly selected and properly maintained 550-16 tire for a 1946 Studebaker can be used for normal road driving, but the overall safety picture depends on more than the tire alone. The available products here are bias-ply designs, and one listed option carries an 80L marking, which corresponds to a 75 mph speed ceiling. On a postwar car, the condition of the brakes, steering, suspension, and wheel hardware is often just as important as the tire itself.

For most 1946 Studebaker Champion driving, the car's own age and mechanical character are likely to set the practical pace long before the tire becomes the limiting factor. Sensible inflation, regular inspection, and realistic expectations matter more than chasing modern-car highway behavior from a vintage chassis. If the car will see sustained road speeds, inspect the entire running gear rather than treating the tire as an isolated solution.

Inflation pressure for a 1946 Studebaker should be set with the original vehicle guidance and the tire maker's published limits in mind. Among the listed 550-16 options, the Firestone shows a maximum load of 840 pounds at 32 psi, while the Avon shows a maximum load of 992 pounds. Those figures are product-specific ratings, not a universal instruction to inflate every 550-16 tire on a 1946 Studebaker to the same pressure.

Use the car's factory recommendation as the operating starting point when available, then confirm that your chosen tire's pressure range supports that use. Vintage tires can react noticeably to small pressure changes in ride and steering feel, especially on a light postwar car such as a 1946 Studebaker Champion. Avoid copying a pressure from one brand or product to another without checking the markings and guidance for the exact tire being mounted.

Before taking a 1946 Studebaker on a longer drive, inspect each tire for cracking, cuts, bulges, uneven wear, and stable inflation pressure. Check the valve stems, make sure the spare is usable, and look over the wheel condition while the car is still in the garage. On a collector car that may spend much of its life parked, these simple tire checks can catch age-related issues before heat and distance turn them into roadside problems.

A longer outing in a 1946 Studebaker Champion also calls for a broader mechanical check beyond the tires. Make sure the brakes feel consistent, the steering has no new play, and the car tracks normally on a short local test before committing to distance. Tires are one major part of road readiness, but on a postwar vehicle they should be checked as part of the whole system rather than in isolation.