Packard 645 Series Tires

Packard 645 Series is listed with two tire sizes for 1929: 32X6.75 and 700-20. The 700-20 size uses a 20-inch rim, with listed products built around that wheel diameter. The 32X6.75 size is an antique diameter-by-section code, so its wheel diameter is not stated in the size itself and must be confirmed separately on the car.

That means the first job is not choosing a brand or sidewall style, but identifying which wheel and tire system your Packard 645 Series actually uses. A restorer should confirm the wheel diameter and compare the car against period literature, surviving original wheels, or marque expertise before committing to either size.

On a Packard 645 Series, 32X6.75 is an antique diameter-by-section size. The 32 refers to the tire's approximate overall outside diameter in inches, while 6.75 refers to nominal section width. Unlike a modern metric size or a balloon code such as 700-20, that first number is not the wheel diameter.

That difference matters because many buyers naturally read the 32 as if it were a rim size, which would be incorrect. When a Packard 645 Series carries an antique-format size, inspect the wheel itself and verify the intended fitment before choosing a replacement tire, especially on a car that may have been updated or restored more than once.

A 1929 Packard 645 Series can show both 32X6.75 and 700-20 because the listings cover two different sizing conventions used within the same model year. One is an older antique-style diameter-by-section code, and the other is a numeric balloon bias-ply size on a 20-inch rim. They are not interchangeable names for the same tire.

For a buyer, the practical takeaway is to identify the exact wheel and tire arrangement on the individual Packard 645 Series rather than relying on the model year alone. Looking at the existing wheel diameter, the style of tire presently fitted, and restoration records will usually resolve which size belongs on the car.

Packard 645 Series fitments here are bias-ply types, and the available 700-20 products are bias ply on 20-inch rims. For this kind of period fitment, a tube is required. That is especially true for collector applications using vintage-style wheels and construction rather than modern tubeless passenger-car designs.

When replacing tires on a Packard 645 Series, the tube, flap if required by the wheel design, and wheel condition deserve the same attention as the outer casing. A sound tire mounted on a compromised rim or with the wrong tube arrangement can create trouble long before the tread ever wears out.

Start with the wheel and the car itself. A 1929 Packard 645 Series may use either 32X6.75 or 700-20, and the 700-20 fitment clearly belongs on a 20-inch rim. The 32X6.75 code does not reveal wheel diameter, so the rim must be measured or verified from trusted restoration records.

The most reliable approach is to compare the existing wheels, any surviving original tires or tubes, restoration invoices, and period Packard reference material. If the car has changed hands or been restored decades ago, do not assume the tires on it today automatically represent the correct specification.

Packard 645 Series products in 700-20 are offered in blackwall, wide whitewall, and double-whitewall styles. The listed blackwall choices include both passenger-style and truck-oriented offerings, while the whitewall selections appear in collector passenger-tire lines. That gives the owner room to match the car's presentation and intended use.

For a formal restoration, sidewall style should follow the appearance goal of the specific Packard 645 Series rather than personal preference alone. Cars restored for touring, show presentation, or a more utilitarian look may legitimately point to different sidewall treatments, so compare your choice against period photographs and marque standards.

Packard 645 Series tires in the listed 700-20 size are available from Firestone, BFGoodrich, and Denman. Firestone appears in both passenger-style balloon and truck-tread offerings, BFGoodrich appears in classic bias-ply passenger styles, and Denman appears in a highway truck-oriented pattern. All listed products for this page are bias-ply construction.

Brand selection on a Packard 645 Series should come after the fitment is settled, not before. Once the correct size and application are confirmed, the remaining decision is whether the car needs a period-looking passenger tire with the preferred sidewall treatment or a heavier-duty truck-style casing better suited to a specialty use case.

Packard 645 Series products in 700-20 appear in Firestone Balloon, Silvertown Classic Bias Ply, Highway Classic Truck, and Firestone Classic Truck series. Firestone Balloon and Silvertown Classic Bias Ply are passenger-oriented collector series, while Highway Classic Truck and Firestone Classic Truck are truck-style offerings within the same nominal size. All are bias ply, but they are aimed at different vehicle character and load expectations.

That distinction matters because a Packard 645 Series restored as a luxury passenger automobile will usually call for a different visual and functional result than a commercial or heavy-duty application. The tire series should match the way the car is configured and presented, especially where sidewall style and carcass character influence the finished look.

A Packard 645 Series should be stored in a cool, dry, dark space away from ozone sources such as electric motors, welders, and battery chargers. Keep the tires clean, maintain proper inflation for the tire actually fitted, and avoid letting the car sit for long periods in direct sun. Bias-ply collector tires benefit from steady conditions far more than frequent cosmetic cleaning.

If the Packard 645 Series will be parked for an extended time, roll it occasionally or use methods that reduce prolonged flat spotting and casing stress. Owners of large pre-war luxury cars should also monitor wheel and suspension condition, because the vehicle's weight can amplify storage-related issues when the car remains stationary for months.

Tires on a Packard 645 Series should be inspected before every meaningful drive and more thoroughly at regular intervals throughout the season. Look for sidewall cracking, tread separation, impact damage, valve-stem condition, tube-related air loss, and any sign that the tire is shifting on the rim. Bias-ply tires on collector cars deserve closer observation than modern daily-driver tires.

A practical routine is to combine tire inspection with brake, wheel-bearing, and steering checks so the Packard 645 Series is assessed as a whole system. On a car of this age and weight, small tire issues can quickly become larger drivability concerns if they are overlooked between infrequent outings.

Packard 645 Series tires should be replaced when age, cracking, hardening, irregular casing shape, persistent air loss, or structural deterioration appears, even if the tread still looks usable. Collector tires often age out long before they wear out. A tire that appears visually respectable can still be unsuitable for continued road use if the casing has degraded.

That point is especially important on a seldom-driven Packard 645 Series, where mileage can be deceptively low. If the car carries any very old tire of uncertain history, including a period-looking spare, have it evaluated by a specialist before relying on it for touring or even moderate demonstration driving.

Packard 645 Series is associated here with both 32X6.75 and 700-20, which shows that more than one period sizing convention applies to the model year. The currently listed replacement products are all in 700-20 and include passenger-oriented balloon series as well as truck-style bias-ply series. That combination suggests the need to distinguish carefully between restoration correctness and simple dimensional compatibility.

For an authenticity-focused Packard 645 Series restoration, the right answer comes from the individual car's wheel equipment, body configuration, and marque reference material. Original sales literature, judging manuals, and established Packard specialists are the best way to determine which size and appearance belong on a particular automobile.

Correct tire fitment can absolutely affect how a Packard 645 Series is judged and how seriously the restoration is taken. Size, sidewall style, overall stance, and the visual character of the casing all contribute to whether the car looks right for its era. On a major classic, incorrect tires can alter the car's proportions as much as an incorrect wheel finish would.

For owners pursuing formal judging or premium resale presentation, tire choice should be treated as a restoration decision rather than an accessory purchase. Marque clubs, period photography, and established Packard restoration standards are useful references when deciding between blackwall, wide whitewall, and double-whitewall presentations in 700-20.

Packard 645 Series offerings in 700-20 include blackwall, wide whitewall, and double-whitewall styles. Any of those can produce a very different visual result on a late-1920s luxury car, from restrained and formal to more dramatic show presentation. The correct choice depends on how the specific Packard 645 Series is being restored and presented.

A careful restoration should compare the chosen sidewall style against period images, known surviving examples, and the standards used by Packard historians and clubs. Because sidewall width changes the whole stance of the car, this is one area where authenticity and personal taste need to be balanced thoughtfully.

A properly selected and correctly installed tire can be appropriate for limited public-road use on a Packard 645 Series, but safety depends on far more than the size molded into the sidewall. Wheel integrity, tube condition, steering, brakes, suspension, and the overall mechanical state of the car all matter. Bias-ply collector tires also behave differently from modern radials and should be driven with that in mind.

The practical standard is to treat a Packard 645 Series as a carefully maintained historic automobile, not as modern traffic transportation. Speeds should remain conservative, distances reasonable, and pre-drive checks routine, especially if the car is freshly restored or has spent long periods off the road.

Before driving a Packard 645 Series, check tire inflation, visible sidewall condition, wheel fastener security, valve stems, and any signs of tube-related leakage or casing distortion. Also inspect the spare, because an unusable spare offers little help on a touring car. On a large 1929 automobile, tire condition should never be considered in isolation from brakes and steering.

A short walk-around before each outing can prevent the most common trouble. If the Packard 645 Series has sat for weeks or months, add a more thorough inspection that includes wheel bearings, brake operation, and the age condition of every tire on the car, not just the ones carrying the most visible tread.

A Packard 645 Series on vintage-style bias-ply tires should be driven at conservative speeds that respect both the age of the automobile and the handling character of period tire construction. Even when the tire itself is new manufacture, it is still part of a 1929 chassis with braking, steering, and suspension expectations very different from modern cars. Higher speed does not suit the purpose of the car or the tire design.

In practice, a Packard 645 Series is best enjoyed as a touring and show automobile rather than a fast-road machine. Smooth inputs, generous following distance, and road speeds that leave a wide mechanical safety margin are the right approach, particularly on crowned roads, grooved pavement, or in hot-weather touring conditions.