1956 Imperial Tire Fitment Guide

All 1956 Imperial vehicles covered here use one tire size: 820-15. That same size fits both the 1956 Imperial C70 and 1956 Imperial C73, and the available products are built for 15-inch rims with a 6.00- to 6.50-inch rim width range. There is no model split at the year-and-make level, so the basic fitment question is simpler than it is on many other collector cars.

That shared fitment means most owners can begin with size confirmation and then move directly to appearance choices such as blackwall, narrow whitewall, or wide whitewall. It is still smart to verify the actual wheel on the car, especially if the car has been restored, modified, or has replacement wheels from another Chrysler product line.

An 820-15 tire on a 1956 Imperial uses the older numeric sizing system common in the 1950s. The 8.20 figure refers to the tire’s nominal section width, while the 15 indicates the wheel diameter in inches. In this application, 820-15 is a bias-ply size, which matches the construction style American luxury cars of the era were built around.

Modern buyers sometimes expect a metric code or a visible aspect ratio, but this older numbering system does not work that way. When you see 820-15 for a 1956 Imperial, think of it as the correct vintage-size language for a full-size mid-1950s car rather than as a direct metric-style measurement code.

Yes. The 1956 Imperial C70 and 1956 Imperial C73 both use 820-15 tires. They also share the same 15-inch rim diameter requirement in the currently available products, so there is no split here where one Imperial model takes a different wheel diameter or a different primary tire size.

That consistency is helpful if you know you have a 1956 Imperial but have not yet narrowed down the exact model. Once the size is confirmed, the next step is usually choosing the sidewall look that best matches your car’s restoration direction, trim level presentation, and how formal or factory-correct you want the finished appearance to be.

1956 Imperial tires in 820-15 are available in blackwall, narrow whitewall, and wide whitewall styles. BFGoodrich offers blackwall and a 1.00-inch whitewall, Firestone offers blackwall, and US Royal offers a 3.50-inch wide whitewall. All of those are bias-ply choices in the correct size for the year and models covered here.

For a mid-1950s American luxury car, sidewall appearance has a major effect on the final look. Blackwalls give a more restrained presentation, while whitewalls are often more in keeping with the era’s upscale styling language. If the car is being restored for judged events, compare the sidewall width on the tire to period photos, original sales literature, and marque-club guidance before making the final call.

Available 820-15 tires for 1956 Imperial vehicles come from BFGoodrich, Firestone, and US Royal. Each brand offers a bias-ply construction in the correct 15-inch size, and the range includes both understated blackwall versions and whitewall styles that better suit the formal look many owners want on an Imperial of this period.

Brand choice on a collector car like a 1956 Imperial often comes down to the visual character you want and whether you are trying to echo a broad American period feel. Once the size is settled, compare the sidewall style, load rating, and any differences in listed rim-width suitability to choose the tire that best matches the car’s intended use and presentation.

BFGoodrich and Firestone both offer 820-15 bias-ply tires for 1956 Imperial vehicles with the same listed maximum load of 1920 pounds at 32 psi and the same 6.00- to 6.50-inch rim width range. The visible difference in the products listed here is mainly sidewall presentation, since BFGoodrich appears in both blackwall and narrow whitewall form, while Firestone is shown in blackwall. Listed weight also differs, with the BFGoodrich versions at 28 or 30 pounds and the Firestone at 33 pounds.

That makes this less a fitment decision than a presentation and preference decision. If you want a blackwall from either brand, both stay within the proper size and load framework for the car. If you want a whitewall in BFGoodrich, that opens another visual option without changing the core 820-15 fitment.

The available 820-15 tires for 1956 Imperial vehicles are specified for 6.00- to 6.50-inch rim widths. They also mount on 15-inch wheels, which aligns with the wheel diameter used by both the C70 and C73 in the fitments covered here. That rim-width range is consistent across the listed products in this size.

Before ordering, measure the wheel actually on the car rather than assuming it is original. A 1956 Imperial may have seen decades of service, wheel swaps, or restoration work, and confirming both the 15-inch diameter and the wheel width helps avoid mounting a correct-size tire onto a wheel that falls outside the recommended width range.

The available 820-15 products for 1956 Imperial vehicles are not marked here with tube-type or tubeless designations in the size field, so tube use should be confirmed against the specific tire’s sidewall marking and the wheel itself. On a collector car from the mid-1950s, tube decisions often depend on both the tire design and the condition and construction of the original-style wheel.

The practical step is to inspect the wheel before mounting and verify the tire’s intended setup with the exact product chosen. If the wheels are original, freshly restored, or have any uncertainty about bead sealing, many owners also consult a restoration specialist familiar with full-size Chrysler luxury cars of the period before final assembly.

Yes, the available 1956 Imperial tire options all use the same 820-15 size and mount on 15-inch wheels. The listed products also share the same recommended rim-width range of 6.00 to 6.50 inches, so there is no split in wheel diameter or basic wheel-width requirement among the current choices in this fitment.

That makes wheel compatibility simpler than on a mixed-size application, but originality still needs to be checked car by car. If your Imperial is wearing replacement wheels, aftermarket rims, or wheels from another model year, confirm width and condition before mounting even though the tire size itself remains the same across the available options.

A 1956 Imperial should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age sidewalls more quickly. Bias-ply tires also tend to develop temporary flat-spotting more readily than radials when a heavy collector car sits in one position for long periods, especially a large luxury car like an Imperial.

Keeping the tires properly inflated, rolling the car periodically, and avoiding long static loads on one contact patch all help preserve shape and ride quality. For longer storage periods, many owners either move the car occasionally or support it in a way that reduces continuous load, while still keeping the suspension and tires in a stable, safe state.

Tires on a 1956 Imperial should be judged more by age and condition than by mileage, since collector cars often cover very few miles but spend long periods parked. A good rule is to begin evaluating tires closely once they reach the five- to seven-year range and to consider replacement around ten years regardless of tread depth. The DOT date code on the tire helps establish the actual age.

A big mid-century luxury car can still feel stable on old-looking tires right up until age-related cracking, hardening, or internal deterioration becomes a problem. If the car is driven regularly, used on highways, or prepared for touring events, age matters at least as much as tread wear when deciding whether it is time to replace the set.

Tires on a 1956 Imperial should be inspected before every drive and again before any longer trip. Look closely for sidewall cracking, tread separation, bulges, cuts, irregular wear, and pressure loss. On an older collector car, it is also wise to inspect valve stems and the wheel condition at the same time, since tire and wheel health work together.

A short pre-drive check matters because these cars are often used intermittently rather than daily, which means problems can develop quietly while the car sits. If the Imperial has been in storage for weeks or months, add a close visual inspection of the spare as well, because the spare may be just as old as the tires on the car and just as important on a longer outing.

A 1956 Imperial C70 would have been built in the bias-ply era, and the available fitment here reflects that with the 820-15 bias-ply size. That aligns with what buyers expect on a full-size American luxury car from the mid-1950s, when bias-ply construction was standard equipment across the market. No original-equipment brand should be assumed without checking factory literature or marque-specific references.

For a faithful restoration, the main concerns are usually the correct size, proper bias-ply construction, and a sidewall style that matches how the car would have been presented in its market and trim context. If the car is headed for judged competition, compare the tire against period photography and consult Imperial and Chrysler marque specialists for event-specific originality guidance.

Yes, correct tire fitment matters on a shown 1956 Imperial because judges and knowledgeable enthusiasts notice size, construction type, and sidewall appearance immediately. On a car from this era, an incorrect overall look can stand out even if the tire physically fits the wheel. A blackwall, narrow whitewall, or wide whitewall can each change the car’s presentation in a meaningful way.

For event preparation, think beyond simple fit and focus on whether the tire complements the car’s year-correct character. Marque clubs, factory photos, and period brochures can help determine whether a restrained or more dramatic whitewall treatment is the better choice for your particular Imperial, especially if the goal is authenticity rather than general collector use.

BFGoodrich and US Royal both offer 820-15 bias-ply tires for the 1956 Imperial with the same listed maximum load capacity of 1920 pounds at 32 psi and the same 6.00- to 6.50-inch rim width range. The biggest distinction in the listed offerings is sidewall treatment: BFGoodrich appears with a 1.00-inch whitewall option, while US Royal is offered with a 3.50-inch wide whitewall. Their listed weights also differ, with BFGoodrich at 30 pounds in the whitewall version and US Royal at 29 pounds.

For restoration work, that difference is mostly visual rather than dimensional. A narrower whitewall creates a more restrained look, while a wide whitewall gives the car a stronger mid-1950s luxury presence. If you are matching a specific period photo, showroom look, or judging standard, the sidewall width may matter as much as the size itself.

A properly sized, properly mounted, and properly maintained 820-15 tire can be suitable for normal road use on a 1956 Imperial, but the tire should always be treated as part of a broader vintage-vehicle system. The available products here are bias-ply designs, and no speed rating is shown in the size markings provided. On a large mid-1950s luxury car, braking, steering feel, suspension condition, and overall mechanical health are often just as important as the tire itself at highway speeds.

The safest approach is to use fresh tires in the correct size, maintain pressure carefully, and drive the car within the limits of its era. A 1956 Imperial was engineered in a different motoring environment than a modern sedan, so smooth inputs, longer stopping distances, and a conservative pace matter even when the tires themselves are new and correctly fitted.

The available 820-15 tires for 1956 Imperial vehicles list a maximum load capacity of 1920 pounds at 32 psi. That figure is the tire’s stated maximum load-and-pressure pairing, not automatically the same as the carmaker’s recommended operating pressure for every driving condition. Factory pressure guidance for the car should be checked in the owner’s manual or period service literature whenever possible.

Use the vehicle recommendation as your baseline and the tire maker’s pressure information as your upper reference for that tire’s rated capacity. Do not transfer pressure assumptions from another size or another collector car, because ride, wear, and handling on a heavy luxury model like a 1956 Imperial can change noticeably with only a few pounds of pressure difference.

Before a longer drive in a 1956 Imperial, inspect each tire for cracking, cuts, bulges, uneven wear, and proper inflation, and make sure the spare is usable as well. Check valve stems, wheel condition, and whether the car has held pressure consistently since the last outing. Because this is a heavy 1950s luxury car, tire condition should be evaluated alongside brakes, steering, cooling, belts, hoses, and fluid levels.

A calm, methodical pre-trip routine is especially important on collector cars that may spend more time parked than driven. Even when the 820-15 tires are the correct size and in good shape, a longer tour asks more of the whole car, so tire inspection should be one part of a complete road-readiness check rather than the only item on the list.