Imperial Crown Tires

Imperial Crown uses two tire sizes across the 1957 through 1961 span. The 1957, 1958, and 1959 Imperial Crown use 950-14 on 14-inch wheels, while the 1960 and 1961 Imperial Crown use 820-15 on 15-inch wheels. Both sizes are traditional numeric bias-ply sizes rather than modern radial metric designations.

The important takeaway is that year and wheel diameter go together on Imperial Crown. A 1957-1959 car should be checked for its 14-inch wheel setup, while a 1960-1961 car should be checked for 15-inch wheels. If the car has had wheels changed during restoration or customization, verify the stamped wheel size or measure the rim before choosing a tire.

A 950-14 tire on an Imperial Crown is a numeric bias-ply size. The 9.50 portion represents the nominal section width in inches with the decimal omitted, and the 14 means the tire fits a 14-inch rim. Available 950-14 products for Imperial Crown are bias-ply tires intended for 14-inch wheels, with listed rim widths of 6.50 to 7.50 inches.

That size belongs to the 1957 through 1959 Imperial Crown years in this range. If your car is one of those late-1950s models, 950-14 is the correct place to start, but the wheel itself should still be checked if the car has had past tire or wheel changes. Because the available fitments are bias-ply, plan on tube-type installation.

Imperial Crown uses two different rim diameters across these years. The 1957 through 1959 Imperial Crown uses 14-inch wheels with 950-14 tires, and the 1960 through 1961 Imperial Crown uses 15-inch wheels with 820-15 tires. The wheel diameter change happens in 1960.

That change is the single most important fitment checkpoint on this page. A 14-inch tire will not substitute for a 15-inch wheel, and the reverse is equally true. Before settling on sidewall style or brand, confirm whether the car is an early 14-inch Imperial Crown or a later 15-inch Imperial Crown, especially if it has been restored outside factory practice.

The available Imperial Crown tires in both 950-14 and 820-15 are bias-ply products, and tube-type installation is appropriate for these fitments. That applies to the classic bias-ply choices offered for both the 14-inch and 15-inch Imperial Crown sizes. Nothing in this range indicates a modern radial tubeless fitment for these years and sizes.

For a collector car, tube choice matters almost as much as tire choice because the tube, flap if applicable, and wheel condition all work together. If your Imperial Crown is being fitted with new bias-ply tires, inspect the wheels carefully for rust, burrs, and past repairs before mounting. Proper tube installation also helps protect the tire casing on a car that may sit for extended periods.

Start with the model year because Imperial Crown changes size by year in a clean split. The 1957 through 1959 Imperial Crown uses 950-14, while the 1960 and 1961 Imperial Crown uses 820-15. Those sizes also correspond to different wheel diameters, 14 inches for the earlier cars and 15 inches for the later ones.

After matching the year, inspect the actual wheels on the car. Collector cars are often restored over decades, and wheel swaps are common enough that the physical rim should always be checked. Once the size and wheel diameter are confirmed, the remaining decision usually comes down to sidewall style, brand preference, and whether you want a standard road bias-ply or a specialty performance-oriented tire in 820-15.

Imperial Crown tires in this range are available in blackwall, narrow whitewall, and wide whitewall styles. The 950-14 offerings include narrow and wide whitewall choices, while the 820-15 range includes blackwall, narrow whitewall, and multiple wide whitewall variations. That gives later 15-inch Imperial Crown fitment the broadest visual range.

Sidewall style has a major effect on the car’s finished look, particularly on late-1950s and early-1960s American luxury cars. Narrow whitewalls can suit a cleaner transitional appearance, while wider whitewalls deliver a stronger period presence. If originality matters, compare the car’s current presentation with period photos, surviving unrestored examples, or marque references before choosing between blackwall and whitewall treatments.

Imperial Crown tire options here come from BFGoodrich, Firestone, US Royal, Universal Vintage Tire, and Avon. The 950-14 size is represented by BFGoodrich products, while 820-15 adds a much broader mix that includes classic bias-ply road tires along with some specialty performance-oriented offerings. Those brands cover both appearance-focused restoration choices and more specialized period-style applications.

Brand selection usually comes down to the look you want, the sidewall style you prefer, and whether the car is a restoration, touring car, or a more specialized build using the 15-inch size. On an Imperial Crown kept close to stock presentation, many owners start by narrowing the decision to sidewall style first and then choosing among the available brands within the correct year-specific size.

Imperial Crown fitments here include several tire series: Silvertown Classic Bias Ply, Firestone Classic Bias Ply, US Royal Classic Bias Ply, Universal Classic Bias Ply, Turbospeed Mk4, Dirt Track, and Dragster Cheater. The classic bias-ply series are the closest match to a traditional roadgoing collector-car presentation, while Turbospeed Mk4 is a distinct period-style series and Dirt Track and Dragster Cheater are specialty performance-oriented designs in 820-15.

That difference matters because not every tire in the same size serves the same purpose. A restored Imperial Crown intended for street use and correct appearance usually points toward the classic bias-ply lines, while the specialty Firestone racing-style tires fit a far narrower use case. Decide first whether the car is being preserved as a stock luxury car or built with a custom or competition-inspired direction.

An Imperial Crown should be stored on a clean, dry surface away from direct sunlight, ozone sources, and large swings in temperature. Keep the tires properly inflated, move the car occasionally if possible, and avoid long-term storage with the full vehicle weight resting in one position for many months. Bias-ply tires especially benefit from careful storage because they can develop flat spotting more readily than modern radials.

If the Imperial Crown will sit through an off-season, many owners either roll the car periodically or support it in a way that reduces continuous loading on one contact patch. Clean tires with mild soap and water only, not petroleum-based dressings. On a collector car, good storage habits preserve both ride quality and sidewall appearance, which is especially important when whitewalls are part of the car’s visual character.

Tires on an Imperial Crown should be inspected before each meaningful drive and more thoroughly at least several times during the year, even if the car sees limited mileage. Check inflation, sidewall condition, tread surface, valve stems, and any signs of uneven wear or age-related cracking. Collector cars often accumulate age faster than mileage, so visual and hands-on inspection matters more than tread depth alone.

A regular inspection routine helps catch issues before they become expensive or unsafe. On an Imperial Crown with bias-ply tires, also watch for flat spotting after storage and for handling changes that suggest pressure loss or internal tire deterioration. If the car has been sitting for a long period, include a wheel and brake area inspection before putting it back into regular road use.

Imperial Crown tires should be replaced when they show age cracking, hardening, sidewall damage, tread separation, repeated air loss, or any structural concern, even if the tread still looks usable. Collector-car tires often age out before they wear out because the vehicle is driven infrequently. Calendar age, storage conditions, and visible condition are more important than mileage alone.

That matters on a large luxury car like Imperial Crown because weight and highway use place real demands on the tire casing. If the car has older tires from a past restoration, have them evaluated with the same seriousness you would give to brake components or steering parts. Whitewalls can still look attractive long after the structure underneath has reached the end of its useful life.

Imperial Crown uses 950-14 in 1957 through 1959 and 820-15 in 1960 through 1961 within this range. The available replacement products are overwhelmingly classic bias-ply designs, which aligns with the period character of the car. Multiple brand and sidewall choices exist within those sizes, so originality depends not just on size but also on appearance and series selection.

For a restoration, size should be confirmed first and then narrowed by sidewall style and overall presentation. If the goal is strict authenticity, compare the car against period literature, judging standards, or marque-club references to determine whether a blackwall, narrow whitewall, or wider whitewall treatment is most appropriate. Getting the look right can change the visual balance of an Imperial Crown as much as the wheel covers or paint.

Correct tire fitment can absolutely affect the value, presentation, and judging outcome of an Imperial Crown. Judges and knowledgeable buyers notice whether the car sits on the proper size, carries an era-appropriate sidewall treatment, and presents a tire profile consistent with the period. A wrong wheel diameter or an obviously mismatched sidewall style can disrupt the car’s stance immediately.

That does not mean every Imperial Crown needs concours-level tires, but it does mean the tire choice should match the purpose of the car. A touring car can prioritize roadgoing practicality within the correct size, while a show car usually benefits from a closer match to period appearance. Marque clubs and show rules are the best final authority when points judging or top-tier resale presentation matters.

Imperial Crown tire options here include blackwall, narrow whitewall, and wide whitewall styles, with the 820-15 fitment offering the widest range of whitewall variations. Any restoration decision should start with the model year and correct tire size, then move to sidewall style. On a late-1950s to early-1960s American luxury car, sidewall width strongly influences the final period look.

A more formal or restrained restoration may lean toward blackwall or a narrow whitewall, while a stronger luxury presentation may favor a wider whitewall. The right answer depends on how the specific Imperial Crown was equipped and how faithfully the restoration is being executed. Period photos of comparable cars are often the quickest way to judge whether a wide whitewall completes the car or overwhelms it.

A properly fitted, properly mounted tire in the correct Imperial Crown size can be suitable for public-road use when the rest of the car is equally roadworthy. These offerings are bias-ply designs, so they should be treated as collector-car tires intended for vehicles that retain period-style driving characteristics. Safety depends on correct size, sound wheel condition, proper inflation, and the overall mechanical state of the car.

An Imperial Crown is a large, heavy car, so tires should never be viewed in isolation from brakes, steering, suspension, and alignment. Before regular road use, inspect the entire chassis and verify that the car tracks properly and does not pull, wander, or vibrate. A beautiful new whitewall does not compensate for a wheel with damage, an aging tube, or neglected front-end components.

Before driving an Imperial Crown, check tire pressure, visible sidewall condition, tread condition, valve stems, and whether the tires match the wheel diameter fitted to the car. On these years, that means confirming 14-inch wheels with 950-14 tires on 1957-1959 cars or 15-inch wheels with 820-15 tires on 1960-1961 cars. Also inspect for signs of long-term storage such as flat spotting or cracking.

A short pre-drive routine is especially worthwhile on collector cars that are not used every day. Once the tires are checked, look at brake operation, steering feel, and any unusual noises as the car begins moving. If an Imperial Crown has been sitting for months, a gentle low-speed shakedown drive is smarter than immediately taking the car onto fast roads.

An Imperial Crown fitted with period-style bias-ply tires should be driven with the expectations appropriate to a collector car, not a modern sedan on contemporary radials. Even when the car is mechanically healthy and the tires are fresh, bias-ply construction generally calls for more conservative speeds, greater following distance, and smoother steering inputs. The goal is stable, composed motoring rather than modern high-speed capability.

Choose a speed that suits road conditions, tire condition, and the car’s overall setup, and reduce pace further if the car has been in storage or is newly returned to service. Bias-ply tires can follow road grooves more readily and react differently to emergency maneuvers than modern radials. On an Imperial Crown, confident touring comes from preparation and moderation, not from pushing the car beyond its period character.