1963 Pontiac Tire Fitment Guide

1963 Pontiac vehicles use five bias-ply sizes, and they are model-specific rather than universal across the make. The full-size 1963 Pontiac uses 800-14 and 850-14 on 14-inch rims, while the 1963 Pontiac Tempest uses 6.50-15, 600-15, and 670-15 on 15-inch rims. Rim-width guidance varies by size where products define it: 800-14 fits 5.00 to 6.00-inch rims, 850-14 fits 5.50 to 6.00-inch rims, 600-15 spans 4.00 to 5.00 inches depending on product, and 670-15 spans 4.50 to 6.00 inches depending on product.

That means year and make alone are not enough for a confident tire choice on a 1963 Pontiac. Start by confirming whether your car is a full-size Pontiac or a Tempest, then confirm the wheel diameter already on the car before narrowing to the appropriate tire size. If the car has been restored or modified over the years, checking the wheel itself is often faster and more reliable than relying on assumptions.

On a 1963 Pontiac, 800-14 is a period numeric bias-ply size. The 800 indicates the tire's nominal section-width class in the older sizing system, and the 14 identifies the wheel diameter in inches. For the 1963 full-size Pontiac, that means a bias-ply tire intended for a 14-inch rim, with available products covering rim widths from 5.00 to 6.00 inches.

This older numeric format does not read like a modern metric radial size, so it helps to think of it as an era-specific bias-ply code rather than trying to convert it directly by eye. On a 1963 Pontiac, the important takeaway is that 800-14 belongs to the full-size 14-inch tire family. If your car is a Tempest with 15-inch wheels, 800-14 is not the correct starting point.

No, 1963 Pontiac models do not all use the same tire size. The full-size Pontiac line uses 14-inch bias-ply sizes, while the Tempest uses 15-inch bias-ply sizes. Within those model families there is still more than one size choice, so the correct fitment depends on the exact model and wheel diameter rather than the make alone.

That split matters because a full-size Pontiac and a Tempest were built for very different roles in the lineup. Even though both belong to 1963 Pontiac, their tire families are not interchangeable in a practical fitment sense. If you are comparing options for a restoration, identify the model first, then decide which sidewall style and exact size best match the way your car was originally equipped.

1963 Pontiac tires are available in several period-appropriate sidewall treatments depending on size. The 800-14 comes in blackwall, narrow whitewall, and wide whitewall form; 850-14 comes in narrow whitewall and wide whitewall; 600-15 comes in blackwall and wide whitewall; and 670-15 comes in blackwall and wide whitewall. Those choices give both full-size Pontiac and Tempest owners room to match a plainer factory look or a more upscale early-sixties presentation.

Sidewall appearance can change the personality of a 1963 Pontiac almost as much as wheel covers or paint color. Full whitewalls tend to suit a more formal restoration theme, while blackwalls often fit simpler or more performance-oriented presentations. If authenticity matters for judging, compare your intended sidewall style to period photos, sales literature, and marque-club guidance for your exact body style and trim level.

Several well-known brands cover 1963 Pontiac fitments, but the mix varies by size. The 800-14 is available from BFGoodrich and Universal Vintage Tire, the 850-14 from BFGoodrich, the 600-15 from BFGoodrich, and the 670-15 from Firestone, US Royal, Coker Classic, and Universal Vintage Tire. All of these are bias-ply offerings, which is consistent with the period character of a 1963 Pontiac.

Brand choice on a 1963 Pontiac often comes down to the exact size your model uses and the sidewall look you want to achieve. Some sizes offer only one brand family, while others give a broader spread of heritage-style options. Once the size is settled, compare sidewall style, rim-width compatibility, and load details within that size instead of trying to choose a brand first.

For a 1963 Pontiac using 670-15, both Coker Classic and US Royal offer bias-ply wide whitewall tires, but their details differ. The Coker Classic 2.75-inch whitewall carries a 1550-pound maximum load at 32 psi and fits 5.00 to 6.00-inch rims, while the US Royal 2 11/16-inch whitewall carries a 1450-pound maximum load at 32 psi and fits 4.50 to 5.00-inch rims. Their whitewall widths are also slightly different.

That makes the decision less about brand prestige and more about matching the tire to the wheel and the visual style you want on the car. If your 1963 Pontiac Tempest has a narrower rim, the US Royal fitment window may align better. If the wheel is wider, the Coker Classic range may be more suitable, and the slightly different whitewall width can also affect the finished look.

Rim-width requirements for 1963 Pontiac tires depend on the size. The 800-14 fits 5.00 to 6.00-inch rims, 850-14 fits 5.50 to 6.00-inch rims, 600-15 spans 4.00 to 5.00 inches depending on the product chosen, and 670-15 spans 4.50 to 6.00 inches depending on product. The 6.50-15 belongs to the Tempest 15-inch family, so its wheel should still be confirmed directly before selecting a tire.

Rim width matters because an otherwise correct tire can look wrong or behave poorly if mounted on a wheel outside its intended range. On a 1963 Pontiac, that is especially important when comparing products within the same size, since the fitment window is not always identical from one tire series to another. Measure the wheel or verify the wheel specification before making the final choice.

Original 1963 Pontiac wheels can be used only with the tire sizes that match their rim diameter and width range. Full-size Pontiac tires in 800-14 and 850-14 require 14-inch wheels, while Tempest tires in 6.50-15, 600-15, and 670-15 require 15-inch wheels. Even within the correct diameter, some sizes call for different rim-width ranges, so the wheel should match both dimensions.

In practical terms, a 14-inch full-size Pontiac wheel is not a substitute for a Tempest 15-inch wheel just because both belong to 1963 Pontiac. If your car has changed hands or gone through older restorations, confirm the wheel diameter stamped on the rim and compare the width against the tire's approved range. That small step helps avoid mounting the right-looking tire on the wrong wheel.

A stored 1963 Pontiac should be kept in a cool, dry, dark space away from direct sunlight, electric motors, welders, furnaces, and other ozone-producing equipment that can accelerate rubber aging. Because 1963 Pontiac fitments here are all bias-ply, long periods of sitting can encourage flat-spotting more readily than many modern radial applications. Clean, dry floors and proper inflation help reduce stress on the tire carcass during storage.

If the car will sit for months, move it periodically or support it in a way that reduces constant load on one spot of the tire, while still following safe lifting practices. A collector car that spends most of its life parked can age its tires long before it wears them out. Good storage habits preserve ride quality, appearance, and the chance of a smoother first drive after layup.

Tires on a 1963 Pontiac usually age out before they wear out, especially on collector cars driven sparingly. A sound rule is to begin close inspection around five to seven years of age and to treat around ten years as the point where replacement deserves serious consideration, regardless of remaining tread. The DOT date code on the tire is the reference point for age, not the date the car was restored.

That timeline matters because a low-mileage 1963 Pontiac can still carry hard, cracked, or internally aged tires that look acceptable at first glance. Bias-ply tires on hobby cars often spend more time parked than driven, so calendar age is more important than odometer readings. If the car's tire age is unclear, checking the sidewall date code is one of the fastest ways to judge whether replacement should move higher on the priority list.

Tires on a 1963 Pontiac should be checked before every drive and inspected more thoroughly before any longer outing. Look for sidewall cracking, tread separation, uneven wear, cuts, bulges, and pressure loss, all of which matter on an older car that may not be used daily. Since these are bias-ply applications, visual condition and inflation consistency are especially important to catch early signs of age-related trouble.

A collector car can sit quietly in the garage and still develop tire problems between drives, so inspection should become part of the normal start-up routine. For a 1963 Pontiac that has been parked for weeks or months, include the spare in the check as well. A few minutes spent on tire inspection can prevent a roadside problem that interrupts an otherwise enjoyable vintage drive.

A 1963 Pontiac Pontiac would have been equipped in the bias-ply era, and the fitment family for the full-size car here is 800-14 or 850-14 on 14-inch rims. That aligns with early-sixties Detroit practice, when bias-ply construction was still the standard factory approach. The exact size and sidewall appearance could vary with body style, trim, market presentation, and how the car was ordered when new.

For a faithful restoration, start with the correct full-size Pontiac model family and confirm whether your car should wear blackwalls, a narrow whitewall, or a wider whitewall. Original brand fitment can vary by production source and period supply, so marque clubs, factory literature, and survivor cars are the best tie-breakers when authenticity matters. The key first step is staying within the correct 14-inch bias-ply family for the full-size 1963 Pontiac.

Correct tire fitment does matter when showing a 1963 Pontiac, especially in judged classes focused on authenticity. Size, construction type, wheel diameter, and sidewall style all affect how accurate the car appears. A Tempest wearing a full-size Pontiac 14-inch tire family, or a full-size Pontiac wearing the wrong sidewall treatment for its presentation, can stand out immediately to experienced judges and marque enthusiasts.

The closer your 1963 Pontiac is to factory-correct appearance, the more important these details become. Even when the tire fits physically, an incorrect width impression or sidewall look can undermine a careful restoration. Before a concours-level restoration is finalized, compare your intended tire choice with period photos, original sales material, and the standards used by the event or Pontiac club where the car will be shown.

In 800-14 for a 1963 Pontiac, BFGoodrich and Universal Vintage Tire both offer bias-ply options, but the sidewall and spec detail are not the same. BFGoodrich covers blackwall, narrow whitewall, and wide whitewall versions, and its products show a 1620-pound maximum load at 32 psi with a 5.00 to 6.00-inch rim-width range. Universal Vintage Tire offers a wide whitewall bias-ply version in the same size for buyers focused on that classic appearance.

That gives a full-size 1963 Pontiac owner two different paths within the same size code. If the goal is broad choice in sidewall style with clearly stated load and rim-width guidance, BFGoodrich brings more variation inside 800-14. If the goal is specifically a wide whitewall visual treatment, Universal keeps the decision simple while staying within the proper full-size Pontiac bias-ply size family.

1963 Pontiac tires can be suitable for highway driving when they are the correct size, properly inflated, in sound condition, and used within the limits of their construction. All of the fitments here are bias-ply tires, and no speed ratings are marked in the available size details, so safe road use depends heavily on tire condition and on the overall mechanical state of the car. On an early-sixties Pontiac, brakes, steering, suspension, and alignment are often just as important as the tire itself.

That means a well-sorted 1963 Pontiac on fresh, correctly fitted bias-ply tires can be enjoyable on normal roads, but it should still be driven with realistic expectations for a vintage chassis. Bias-ply behavior differs from modern radial behavior, particularly in tracking and steering feel. Before sustained highway use, make sure the car drives straight, holds pressure consistently, and shows no signs of age-related cracking or separation.

Inflation pressure on a 1963 Pontiac should start with the factory recommendation for the car itself, then be checked against the tire's own rating information. Several available sizes show maximum-load figures at 32 psi: 800-14 at 1620 pounds, 850-14 at 1740 pounds, 600-15 at 1150 pounds, 670-15 at 1450 pounds in some versions, and 670-15 at 1550 pounds in the Coker Classic version. Those figures are load-rating references, not universal operating pressures for every 1963 Pontiac application.

The practical approach is to use the owner's manual or marque reference as the baseline for your specific model, then confirm the tire maker's guidance for the exact product on the car. Do not transfer a pressure assumption from a Tempest size to a full-size Pontiac size, or from one 670-15 product to another, just because the size code looks similar. Correct inflation affects ride, wear, and stability on any vintage Pontiac.

Before a longer drive in a 1963 Pontiac, inspect all four tires and the spare for cracking, cuts, bulges, irregular wear, and stable air pressure. Confirm that the tire size matches the model, since full-size Pontiac and Tempest applications are not the same. On an older bias-ply-equipped car, it also pays to check wheel condition, valve stems, and whether any tire shows signs of long-term storage fatigue after sitting.

Tires are only one part of the pre-drive routine on a vintage Pontiac, but they are one of the easiest places to catch trouble before it becomes a breakdown. Pair the tire check with a quick review of brakes, steering, cooling, and fluid levels, especially if the car has not been exercised recently. A calm, methodical inspection is usually far more valuable than assuming a low-mileage collector car is automatically road-ready.