1963 Imperial Tire Fitment Guide

All 1963 Imperial models use one tire size: 820-15. That size is a bias-ply fitment mounted on a 15-inch rim, and the available products for 820-15 are built for wheel widths from 6.00 to 6.50 inches. Because the full 1963 Imperial range shares the same size, there is no need to sort between different factory tire dimensions by model before starting your search.

That makes the buying decision much simpler than it is on many year-make pages. Once you have confirmed that your car still has the correct 15-inch wheels, the next step is choosing the sidewall appearance that best fits your restoration or driving goal, whether that means blackwall, a narrow whitewall, or a wider whitewall presentation.

On a 1963 Imperial tire, 820-15 is a numeric bias-ply size. The 8.20 portion refers to the nominal section width in inches, and the 15 indicates the wheel diameter in inches. Unlike a modern metric radial code, this format does not include an aspect ratio written into the size, and the construction is bias-ply rather than radial.

That matters because the code describes both era and fitment style at a glance. If you are restoring a 1963 Imperial and want the tire to look and behave like a period American luxury-car tire, understanding the numeric bias-ply format helps you avoid confusing it with later alphanumeric or metric sizing systems that belong to a different automotive era.

Yes. Every 1963 Imperial model uses the same 820-15 tire size, so there is no split between one body style and another at the year-and-make level. The wheel diameter remains 15 inches across the range, and the supported rim width range for the available 820-15 products is 6.00 to 6.50 inches.

That consistency is helpful for owners because it keeps fitment research focused. Instead of comparing multiple sizes, you can concentrate on confirming that the wheels on the car remain true to factory dimensions and then decide which sidewall style best matches the way you want your 1963 Imperial to present, whether as a formal show car or a regularly driven collector car.

1963 Imperial tires in 820-15 are available in blackwall, narrow whitewall, and wide whitewall forms. BFGoodrich offers both blackwall and a 1.00-inch whitewall in this size, Firestone offers blackwall, and US Royal offers a 3.50-inch wide whitewall. All of them retain the correct bias-ply construction for the period, but the visual character changes significantly with sidewall treatment.

Sidewall choice can affect the personality of the car more than many owners expect. A blackwall usually gives a cleaner, more restrained look, while a narrow or wide whitewall can emphasize the formal, upscale styling associated with early-1960s American luxury cars. If originality matters for a judged restoration, compare your choice to period photos and marque-club guidance before finalizing it.

BFGoodrich, Firestone, and US Royal all make 820-15 tires for 1963 Imperial vehicles. Each brand offers a bias-ply tire in the correct 15-inch fitment, and together they cover blackwall, narrow whitewall, and wide whitewall appearances. Load capacity in this size reaches 1920 pounds at 32 psi across the available products.

Brand choice often comes down to the exact look you want and which series best suits the personality of the car. Owners building a period-style luxury car often start by narrowing the search to sidewall appearance first, then compare brand presentation and details within that group rather than treating every 820-15 as visually identical.

BFGoodrich and Firestone both offer 820-15 bias-ply tires for the 1963 Imperial with the same published maximum load capacity of 1920 pounds at 32 psi and the same 15-inch rim diameter with a 6.00 to 6.50 inch rim width range. The key differences here are presentation and construction details within the product line: BFGoodrich is available in both blackwall and 1.00-inch whitewall versions, while Firestone appears as a blackwall option in this fitment. Product weight also differs, with the BFGoodrich versions lighter than the Firestone example.

For most owners, that means the choice is less about major fitment differences and more about visual preference and brand character. If your 1963 Imperial needs a whitewall from this comparison, BFGoodrich is the natural starting point. If you want a blackwall, either brand stays within the correct size and basic load specification, so the final decision can rest on appearance and brand loyalty.

The 820-15 tires used on 1963 Imperial vehicles are built for rims that are 6.00 to 6.50 inches wide, and they mount on a 15-inch wheel. That width range applies across the available products in this size, so the first dimension to verify is not just wheel diameter but also the actual width of the wheel on the car.

That check is especially important on collector cars that may have had wheels swapped over the years. A 15-inch wheel alone is not enough information if the width has changed, so measure the wheel or confirm its specification before selecting a tire. That extra step helps preserve correct profile, sidewall shape, and clearance behavior.

Inner tube status is not marked in the 820-15 size description itself, so tube decisions should be made by the exact tire and wheel combination rather than by size name alone. With a 1963 Imperial, the tire size is straightforward, but whether a tube is appropriate can still depend on the wheel design, wheel condition, and the specific tire’s construction details.

A sound original wheel and a reproduction tire are not always enough by themselves to answer the tube question. Before installation, check the specific sidewall marking and confirm the recommendation with the tire manufacturer or an experienced vintage tire installer. That is the safest way to match the 820-15 tire to the wheel you actually have on the car.

A 1963 Imperial should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can accelerate sidewall aging. Because the car uses bias-ply tires, long stationary periods can encourage temporary flat-spotting more readily than many modern radials. Keeping the tires properly inflated also helps the casing hold its shape during storage.

If the car will sit for an extended season, move it slightly from time to time or support it in a way that reduces long-term static loading. Clean, dry concrete is better than damp ground, and a breathable car cover is better than trapping moisture around the tires. Good storage habits preserve both appearance and ride quality on a luxury collector car like a 1963 Imperial.

Tires on a 1963 Imperial should be judged more by age and condition than by mileage, since many collector cars travel relatively few miles each year. A sensible practice is to begin close inspection and evaluation around five to seven years of service and to treat roughly ten years as a serious replacement point, even if tread depth still appears usable. The DOT date code on the tire is the key reference for age.

That approach matters because rubber aging, internal deterioration, and storage history often limit an old luxury car’s tires before tread wear does. A low-mile 1963 Imperial can still have tires that look acceptable at a glance yet are no longer ideal for regular road use. Age, cracking, and ride behavior are usually more meaningful than odometer totals.

Tires on a 1963 Imperial should be inspected before every drive and again before any longer highway outing. Check for sidewall cracking, cuts, bulges, embedded debris, irregular tread wear, and any loss of pressure since the last drive. Because collector cars often sit longer between uses, problems can develop gradually and go unnoticed until the next outing.

A quick inspection routine is especially worthwhile on a heavy, full-size luxury car. Pay attention to how the car has been stored, how old the tires are, and whether the sidewalls still look supple rather than dried out. Catching small issues early helps prevent a short local drive from turning into a roadside problem on a larger trip.

A 1963 Imperial would have been associated with bias-ply construction in period, and the correct size family for the year and make is 820-15. That matches the era’s full-size American luxury-car practice, where 15-inch bias-ply tires were still standard equipment territory. Original-equipment branding could vary by market, dealer arrangement, and production timing, so the safest original-style reference points are size, construction, and sidewall treatment rather than assuming one universal brand.

For a restoration, that means getting the basic architecture right first. An 820-15 bias-ply tire with the right sidewall appearance will usually matter more to authenticity than chasing an unverified brand claim. If your car is being restored for marque judging, compare against factory literature, period photography, and Imperial club resources for body-style and market-specific confirmation.

Yes, correct tire fitment matters on a shown 1963 Imperial because size, construction type, and sidewall appearance all influence how authentic the car looks. A bias-ply 820-15 is appropriate to the period, while a visibly different modern-format tire can change the stance and visual language of the car even before a judge examines finer details. Whitewall width can also affect whether the presentation feels true to an early-1960s American luxury car.

The practical takeaway is to match the tire not only to the wheel but also to the restoration target. A local cruise-night car may allow more flexibility, while concours or marque-specific judging can be much stricter about construction and sidewall style. Before committing, check the event’s standards and compare your choice to known period examples of 1963 Imperial presentation.

BFGoodrich and US Royal both offer 820-15 bias-ply tires for the 1963 Imperial with the same published load capacity of 1920 pounds at 32 psi and the same 15-inch fitment for 6.00 to 6.50 inch rims. The major distinction is visual: BFGoodrich appears in blackwall and 1.00-inch whitewall versions, while US Royal is offered here as a 3.50-inch wide whitewall. Product weight also differs slightly between them.

That makes this comparison especially relevant to restoration work. If you are aiming for a more restrained factory-style look, the BFGoodrich whitewall may suit the car better; if you want a stronger luxury-era visual statement, the US Royal wide whitewall is the more dramatic choice. Either way, both remain within the correct 820-15 bias-ply format for a 1963 Imperial.

1963 Imperial tires in 820-15 can be suitable for highway driving when they are new, correctly installed, properly inflated, and used within their intended construction limits. The available 820-15 products here are bias-ply tires, so the driving feel will be true to the period rather than identical to a modern radial-equipped car. On a full-size early-1960s luxury car, the overall mechanical condition of the suspension, steering, and brakes is just as important as the tire itself.

Highway suitability depends on the whole car being ready for that use. Before extended travel, make sure the tires are age-appropriate, free from visible damage, and holding pressure consistently, then pair that with a broader mechanical inspection. A 1963 Imperial can be a satisfying road car, but safe highway use comes from a well-sorted vehicle, not from tire size alone.

The available 820-15 tires for a 1963 Imperial carry a maximum load capacity of 1920 pounds at 32 psi. That figure is the tire’s load-and-pressure rating, not automatically the everyday operating pressure your car should use in service. Factory recommendations for a 1963 Imperial may differ depending on the vehicle’s weight distribution and ride target.

The best practice is to start with the vehicle manufacturer’s original inflation recommendation for the car and compare it with the tire manufacturer’s guidance for the exact 820-15 product being installed. Avoid assuming that every collector tire in the same size should run at the same pressure in every situation. Proper inflation should support load, ride quality, and even wear together.

Before taking a 1963 Imperial on a longer drive, inspect each tire for cracking, weathering, bulges, cuts, punctures, and uneven tread wear, and confirm that all four are holding their intended pressure. Check the spare as well, since a spare that has aged out is not much help on the road. Because the car is a large, heavy luxury vehicle, even small tire issues can become more noticeable once speed and distance increase.

Treat tire inspection as one part of a larger pre-trip routine that also includes brakes, steering, cooling, and fluid checks. A tire that looks acceptable in the garage may reveal age or storage-related issues once the car is driven at sustained speed. Spending a few minutes on a full pre-drive walkaround can make a long Imperial trip far more predictable and enjoyable.