1956 Packard 5680 & 5688 Series Tires

The 1956 Packard 5680 & 5688 Series uses an 800-15 tire size in bias-ply construction. The covered 8-cylinder sub-model uses that same primary size, so fitment is straightforward at the size level rather than split between multiple original tire sizes.

That means the first step is matching the car to an 800-15 on a 15-inch wheel, then deciding which version best suits the car’s intended use and appearance. Whitewall width, tire construction, and the actual wheel setup on the car matter more than searching for an alternate primary size.

The primary 800-15 fitment for the 1956 Packard 5680 & 5688 Series is built for a 15-inch rim. Available bias-ply products in this size are matched to that rim diameter, and the radial-equivalent listings also stay within the same 15-inch wheel family.

Rim diameter is only part of the check, especially on an older luxury car that may have seen wheel changes over the years. It is worth confirming the actual wheel width on the car, the bead-seat diameter, and any aftermarket wheel change before choosing between a traditional bias-ply tire and a radial alternative.

Yes. The 1956 Packard 5680 & 5688 Series 8 Cyl. uses the same 800-15 bias-ply primary tire size as the core fitment for this vehicle line. There is no separate primary size to sort through for that covered sub-model.

That keeps the decision centered on tire type rather than size differences between trims. Once the 8-cylinder Packard is confirmed, the remaining questions are whether to keep a traditional bias-ply presentation, which whitewall width best matches the car’s look, and whether a radial equivalent is worth evaluating for road use.

For the 1956 Packard 5680 & 5688 Series, 800-15 is the primary bias-ply tire size. That numeric format belongs to the traditional bias-ply sizing system used on many mid-1950s American cars, and it matches the original-era construction type for this Packard fitment.

Keeping the car on an 800-15 bias-ply tire usually appeals to owners who want a more period-style stance and visual character. A radial equivalent can still be considered, but the change should be treated as a construction change rather than simply another version of the same tire, with wheel width and clearance checked first.

Radial equivalents for 800-15 include 225R15 as the 80-series metric radial option, P235/75R15 as the 75-series P-metric radial option, P235/70R15 as the 70-series P-metric radial option, and 800R15 as the bias-look radial equivalent. Each one stays in the 15-inch rim family but represents a different radial sizing convention.

Those choices give a Packard owner several ways to approach a radial conversion, from a more traditional metric radial format to a bias-look radial that keeps a more vintage visual impression. The equivalent listings also point to a 6-8 inch rim width range, but actual wheel dimensions and car clearance still need to be confirmed.

Start by confirming the wheel diameter, wheel width, and the radial equivalent size being considered for the 1956 Packard 5680 & 5688 Series. For the original 800-15 fitment, the available radial alternatives are 225R15, P235/75R15, P235/70R15, and 800R15, with a 6-8 inch recommended rim width range tied to the equivalent listings.

A conversion should also account for the actual condition and setup of the car. Steering clearance, fender room, suspension height, and any previous wheel changes can affect the outcome, even when the replacement remains on a 15-inch rim. That is especially important on a heavy 1950s luxury car with long, low bodywork.

Start with the correct primary size and construction. The 1956 Packard 5680 & 5688 Series uses an 800-15 bias-ply tire, so the basic choice is whether to keep that traditional setup or compare it against a radial equivalent while staying within the proper 15-inch wheel diameter.

After size is settled, focus on the kind of Packard you want to present and drive. Whitewall width, wheel-width compatibility, and the car’s intended use all matter. A restoration-oriented car may lean toward a traditional bias-ply look, while a driver may lead you to study the radial-equivalent options more closely.

The available 800-15 bias-ply products for the 1956 Packard 5680 & 5688 Series use a Wide Whitewall sidewall style. Within that presentation, the visible difference comes from whitewall width rather than a switch between blackwall, redline, or other sidewall treatments.

That makes appearance selection fairly focused. Choosing between a 3.00-inch whitewall and a 2.50-inch whitewall changes the look of the car without changing the primary size or construction. On a large 1956 Packard, that sidewall detail can strongly influence whether the finished car feels more formal, restrained, or visually expansive.

The available 800-15 bias-ply products for the 1956 Packard 5680 & 5688 Series are part of the Coker Classic Bias Ply series. That keeps the product selection concentrated around one traditional-style series rather than spread across several different tread families or brand lines.

With the series staying consistent, comparison becomes simpler. The main differences are the whitewall presentation and the usual fitment checks tied to wheel condition and intended use. That can be helpful for a Packard owner who already knows the car needs a proper 800-15 and wants to narrow the choice without sorting through unrelated series.

A period-style starting point for the 1956 Packard 5680 & 5688 Series is the primary 800-15 bias-ply fitment. That keeps the car in the same vintage sizing and construction family associated with a mid-1950s American luxury automobile, and it preserves the traditional look that many restoration-minded owners want.

The visual decision then becomes more specific: which whitewall width best matches the Packard’s presentation and the owner’s restoration goals. If exact originality matters beyond general period style, the smartest next step is to compare the car against marque references, factory literature, or well-vetted Packard restoration sources.

Yes, correct tire fitment matters because tire size and construction have a major effect on how a 1956 Packard 5680 & 5688 Series sits, looks, and reads visually. An 800-15 bias-ply tire supports the car’s proper vintage character in a way that a modern-looking substitute may not.

Restoration results are shaped by more than sidewall color alone. Wheel diameter, tire profile, whitewall width, and construction all influence the finished appearance, especially on a large Packard with prominent wheel openings and formal body lines. Even a road-driven restoration benefits from starting with the proper fitment before weighing any radial alternative.

Yes. Modifications can affect tire fitment on a 1956 Packard 5680 & 5688 Series even when the selected tire stays in the correct 15-inch family. Wheel-width changes, aftermarket wheels, suspension alterations, brake conversions, or a different ride height can all change how an 800-15 or radial equivalent sits in the car.

That is why an older Packard should be checked as it exists today rather than assumed to match factory wheel and suspension dimensions. Tire-to-fender room, steering clearance, and actual wheel measurements deserve a close look before installation, especially if the car has been restored, modified, or apart for an extended period.

Before road use, inspect the wheels, valve stems, lug hardware, and overall tire seating, then confirm inflation and look over the suspension and steering for obvious looseness or wear. On a 1956 Packard 5680 & 5688 Series, it also makes sense to verify that all four tires match the intended size and construction choice.

A slow first drive is still worthwhile on a collector car, even with new tires installed. Listen for rubbing, feel for pull or vibration, and recheck air pressure after the car has settled into use. That approach helps catch wheel, alignment, or clearance issues before the Packard is asked to cover real miles.

Maintain 800-15 tires on a collector 1956 Packard 5680 & 5688 Series by checking pressure regularly, watching for uneven wear, and inspecting the sidewalls for age-related cracking, cuts, bulges, or signs of air loss. Cars that sit for long periods deserve more attention because time and storage conditions affect tire condition even when mileage stays low.

Storage habits matter almost as much as driving habits on a mid-century collector car. Keeping the Packard away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tires, and a pre-drive inspection should become routine after any extended layup. Older luxury cars are heavy enough that neglected tire condition quickly becomes a real concern.