Plymouth P29-1, 29-2 & 29-3 Tires

Plymouth P29-1, 29-2 & 29-3 uses two listed tire sizes for 1956: 670-15 and 710-15. Both are numeric bias-ply sizes built for 15-inch rims. Products in 670-15 are commonly paired with wheel widths around 4.50 to 5.00 inches, while 710-15 products are commonly paired with wheel widths around 5.00 to 5.50 inches. Both sizes are available in blackwall, narrow whitewall, and wide whitewall forms depending on brand and series.

The practical difference is that 710-15 is the wider tire, so the correct choice depends on the exact wheel and the way the specific Plymouth P29-1, 29-2 & 29-3 was equipped. Check the existing tire size, measure the wheel width if needed, and compare against period literature for the exact car. That approach is more reliable than selecting by year alone, because both sizes appear within the same 1956 model family.

On Plymouth P29-1, 29-2 & 29-3, the size 670-15 uses the older numeric bias-ply format. The 670 portion indicates a nominal section width of about 6.70 inches, and the 15 indicates the rim diameter in inches. The available tires in this size are all bias-ply products for 15-inch rims, with many built around rim widths in the 4.50 to 5.00 inch range.

That matters because 670-15 is not interchangeable with every 15-inch wheel in the model family. The wheel width and the car’s original specification still need to line up with the tire size. On a restoration, 670-15 often suits the narrower fitment within the 1956 Plymouth P29-1, 29-2 & 29-3 range, and it also gives the buyer room to choose among blackwall, narrow whitewall, and several wide-whitewall looks.

A 1956 Plymouth P29-1, 29-2 & 29-3 has two tire sizes listed because the model family used more than one configuration within the same year. Both 670-15 and 710-15 fit 15-inch rims, so the split is not a wheel-diameter change. It is more consistent with differences in trim, equipment, wheel width, or intended presentation within the P29-1, 29-2 & 29-3 group.

That means the correct tire cannot be chosen by year alone. Compare the existing wheel width, the size stamped or molded on any surviving tire, and the appearance you are trying to preserve. A car with narrower wheels should stay with the narrower tire range, while a car set up for the wider size should keep that relationship so the stance, steering feel, and sidewall proportions remain appropriate to the car.

The listed Plymouth P29-1, 29-2 & 29-3 tires are all bias-ply products in older numeric sizes, and the appropriate guidance for these fitments is that a tube is required. That applies to both 670-15 and 710-15. The available product families here are traditional collector-car bias-ply tires rather than modern radial tubeless replacements.

Tube fitment matters because the tube, flap practice where applicable, wheel condition, and valve-stem setup all affect how the finished assembly performs on a low-use collector car. When a 1956 Plymouth is being returned to road service after years of storage, the wheel should be checked for rust, pitting, and bead-seat damage before mounting new tires. A clean, correctly prepared wheel helps the tire and tube perform as intended.

The best way to confirm the correct tire size for a 1956 Plymouth P29-1, 29-2 & 29-3 is to match three things: the wheel diameter, the wheel width, and the size history already associated with the car. Within this model group, the two listed options are 670-15 and 710-15, both for 15-inch rims. The narrower size commonly aligns with 4.50 to 5.00 inch wheel widths, while the wider size commonly aligns with 5.00 to 5.50 inch wheel widths.

Start with the wheel that is actually on the car, because wheels are sometimes changed over the decades. Then compare that measurement with original owner material, build information, or guidance from Plymouth restorers familiar with the specific body style and trim. If the car is being restored for judging, sidewall treatment matters too, since blackwall, narrow whitewall, and wide whitewall options can all change the appearance even when the base tire size is correct.

Plymouth P29-1, 29-2 & 29-3 tires are available in blackwall, narrow whitewall, and wide whitewall styles across the listed 670-15 and 710-15 sizes. The wide-whitewall offerings vary by brand and can range from modest widths to the fuller 1950s-style presentation that many restorers want. Blackwalls are also available in both sizes for a plainer or more utilitarian look.

Choosing the right sidewall is as much about authenticity and stance as it is about fitment. A whitewall can dramatically change the visual character of a 1956 Plymouth, especially on cars restored to a showroom-era appearance, while blackwalls suit more understated builds. Match the sidewall width to period photos, original sales material, or the exact trim level so the finished car looks coherent rather than merely wearing the correct size.

The listed brands for Plymouth P29-1, 29-2 & 29-3 tires include Firestone, US Royal, Coker Classic, Universal Vintage Tire, BFGoodrich, Excelsior, Avon, Goodyear, and STA. Those brands appear across the two 1956 sizes, although the exact mix differs between 670-15 and 710-15. Several also offer more than one sidewall treatment or series within the same base size.

Brand choice usually comes down to the visual style you want, the series you prefer, and whether you are matching a period-correct tread family for a restoration. Some buyers choose by sidewall width first and brand second, while others want a particular marque-name look for show presentation. It is worth comparing the available series within the correct size so the finished tire complements both the car’s era and the intended use.

Plymouth P29-1, 29-2 & 29-3 tires appear in several named series, including Firestone Classic Bias Ply, US Royal Classic Bias Ply, Coker Classic Bias Ply, Universal Classic Bias Ply, Silvertown Classic Bias Ply, Excelsior Bias Ply, Turbospeed Mk4, Super Cushion, Custom Super Cushion, Super Cushion Deluxe, and Super Transport. Most are traditional passenger-car bias-ply offerings, while Super Transport reflects a military-and-truck family rather than a standard passenger presentation.

That distinction matters when selecting a tire for the character of the car. A mainstream classic bias-ply series is usually the natural match for a restored 1956 Plymouth passenger car, while a transport or truck-oriented series may suit only a very specific use case. Comparing series helps you balance tread look, sidewall treatment, and period feel without changing the base size that the wheel and application call for.

A Plymouth P29-1, 29-2 & 29-3 should be stored clean, dry, and out of direct sunlight, with the tires kept away from ozone sources such as electric motors, welders, and battery chargers. Proper inflation matters even when the car is parked, because underinflated bias-ply tires can develop flat spotting or sidewall stress more readily during long periods of inactivity. If the car will sit for months, moving it occasionally helps distribute the load.

Collectors who store a 1956 Plymouth for winter or between show seasons often benefit from using tire cradles or slightly reducing sustained point loading by rolling the car periodically. A clean floor, moderate temperatures, and a covered but ventilated space all help preserve the rubber and the cosmetic finish of whitewalls. If the car is stored with show-level wide whitewalls, keep them clean and shielded from staining products and standing moisture.

Tires on a Plymouth P29-1, 29-2 & 29-3 should be inspected before every meaningful drive and again after long storage periods. On a low-mileage collector car, age, inflation loss, sidewall cracking, bead condition, and tube-related issues can matter more than tread wear. That is especially true with bias-ply tires, where storage history and wheel condition influence serviceability just as much as visible rubber depth.

A useful routine is to check inflation, look for bulges or separations, inspect the tread and sidewalls closely, and make sure the valve stems and wheel hardware remain sound. If the Plymouth sees only occasional outings, plan a more thorough inspection at least seasonally. Cars that have been parked for years should have the tires and wheels evaluated carefully before road use, because old collector tires can look presentable long after they have become unwise to trust.

Tires on a Plymouth P29-1, 29-2 & 29-3 should be replaced when age, cracking, hardening, bulging, repeated air loss, or any sign of casing deterioration appears, even if the tread still looks deep. Collector-car tires often age out before they wear out, particularly on cars that spend more time parked than driven. Tubes, valve components, and wheel condition should be considered at the same time, since a fresh tire mounted over aging support parts can still create trouble.

A 1956 Plymouth that drives only to local shows can tempt owners to stretch service life too far, but time is as important as mileage. If the car has sat for years or the tires’ age is unclear, replacement is often the prudent step. The same caution applies to any long-stored collector tire: appearance alone is not a reliable measure of serviceability, and age-related deterioration can exist even when tread depth remains generous.

Plymouth P29-1, 29-2 & 29-3 is associated here with two original-style numeric bias-ply sizes for 1956: 670-15 and 710-15. The available replacement families include several period-style bias-ply series from Firestone, US Royal, BFGoodrich, Goodyear, Universal, Coker Classic, and others. Because more than one size appears within the same model group, original fitment depended on the specific configuration rather than the Plymouth nameplate alone.

For a restoration, the best reference is the exact car’s original paperwork, sales literature, or guidance from Plymouth marque specialists who know the trim and body distinctions. That helps narrow not only the correct base size but also the most believable sidewall treatment and series style. Getting those details right can change the stance and visual balance of the car as much as the wheel covers, paint, or ride height.

Correct tire fitment can absolutely affect the value and judging outcome of a Plymouth P29-1, 29-2 & 29-3. Judges and experienced buyers notice whether the size, sidewall style, and overall profile suit the year and character of the car. On a 1956 Plymouth, the difference between the right narrow or wide whitewall treatment and the wrong one can change the look immediately, even when the wheel diameter is correct.

The practical takeaway is that tires should be treated as a visible restoration component, not merely a maintenance item. Choosing between 670-15 and 710-15, and then selecting the appropriate blackwall, narrow whitewall, or wide whitewall version, should follow the same careful standard as upholstery or exterior trim. Marque clubs, period brochures, and surviving original cars are the best references when authenticity and show presentation matter.

Plymouth P29-1, 29-2 & 29-3 tires are available in blackwall, narrow whitewall, and wide whitewall styles, all of which can be relevant to a 1956 restoration depending on the specific presentation being recreated. The decade strongly favored whitewall styling on many American passenger cars, but the exact width varied by trim level, owner preference, and the look being targeted. Blackwall options remain useful for a simpler or more restrained period appearance.

The most accurate choice comes from matching the sidewall style to the exact Plymouth’s original sales image, trim level, and surviving evidence. Wide whitewalls create the fullest mid-1950s visual impact, while narrow whitewalls can suit a later-period replacement look within the same era. If the car is being judged, the sidewall width should be selected with the same care as hubcaps and paint accents, because it has a large effect on authenticity.

Properly fitted new bias-ply tires in the correct size can be suitable for driving a Plymouth P29-1, 29-2 & 29-3 on public roads when the rest of the car is equally roadworthy. The key conditions are correct sizing, sound wheels, proper tube installation, and a chassis, brake, and steering system that has been inspected and sorted. A 1956 Plymouth on authentic bias-ply tires will not behave like a modern radial-equipped car, but that does not make it unusable.

The practical issue is matching expectations to period equipment. Bias-ply tires tend to follow road contours more, steer differently at low speed, and reward conservative driving habits. Before regular road use, make sure the suspension, alignment, and braking system are in proper condition so the tires are not asked to compensate for other problems. A well-prepared car can be enjoyed confidently, but it should always be driven with the manners of a mid-1950s automobile in mind.

Before driving a Plymouth P29-1, 29-2 & 29-3, check the tire inflation, sidewall condition, tread condition, wheel hardware, and valve stems, then confirm that the car is wearing either 670-15 or 710-15 on 15-inch wheels as appropriate to its setup. On a collector car with bias-ply tires, it is also wise to look for flat spotting from storage and any sign that the tire has shifted on the rim or developed a bulge.

A short, careful evaluation drive after storage is often better than immediately heading into traffic. Listen for vibration, feel for pull in the steering, and verify that the brakes apply evenly. If the car has recently received new tires, recheck pressures and wheel fasteners after the first few outings. Those simple habits help a 1956 Plymouth feel settled and predictable, especially when the car sees occasional rather than daily use.

A Plymouth P29-1, 29-2 & 29-3 on original-style bias-ply tires should be driven at moderate speeds that suit both the tire construction and the condition of the car as a whole. Even when the tires are new, a 1956 Plymouth remains a period automobile with period steering, braking, and suspension behavior. The appropriate pace is one that leaves generous room for stopping, lane changes, road crown, and heat buildup during longer runs.

In real use, that means avoiding the temptation to drive the car as if it were on modern touring radials. Build speed gradually, especially after long storage, and pay attention to how the car tracks and reacts over pavement changes. If the Plymouth will be driven farther than local cruise or show distances, pause periodically to inspect the tires and overall running condition. Conservative speed is part of preserving both safety and the car itself.