Plymouth P27-1, 27-2 & 27-3 Tires

Plymouth P27-1, 27-2 & 27-3 uses 670-15 for the 1955 model year. All listed products for that fitment use a 15-inch rim, and most of the available bias-ply options are intended for rim widths around 4.50 to 5.00 inches, with a few listings extending slightly beyond that range.

That makes selection more straightforward than on many multi-year collector car pages, but the wheel still needs to be checked on the car itself. A Plymouth that has had wheels swapped over the years can look correct at a glance while carrying a different rim width or a non-original tire, so it is worth measuring the wheel and comparing it with the product specifications before choosing a blackwall, narrow whitewall, or wide whitewall version.

On Plymouth P27-1, 27-2 & 27-3, 670-15 is a traditional numeric bias-ply size. The 670 portion is the nominal section width expressed in the older inch-based system with the decimal omitted, and the 15 indicates a 15-inch wheel diameter.

That older sizing convention does not translate directly to modern metric radials, so it should be read as a period bias-ply designation rather than a simple width-and-rim code by modern standards. For a restoration or preservation-minded Plymouth, the important point is to stay with the listed 670-15 fitment and then narrow the choice by sidewall style, rim width compatibility, and the kind of driving the car will actually do.

Plymouth P27-1, 27-2 & 27-3 uses bias-ply tires in the listed 670-15 fitment, and a tube is required. That matches the period construction style represented across the available products for this model group.

Tube fitment matters because a collector car wheel and a bias-ply tire need to be treated as a system, not as separate parts. When replacing tires on a mid-1950s Plymouth, it is wise to inspect the wheel condition, valve stem area, and the inside of the rim at the same time so the tube, flap if required, and tire all work together properly.

A 1955 Plymouth P27-1, 27-2 & 27-3 uses 670-15 in the available fitment range. The wheel should be confirmed as a 15-inch rim, and the rim width should be checked against the tire you are considering, since some products are aimed at 4.50 to 5.00-inch rims while others allow a slightly different width range.

The practical approach is to start at the wheel, not the old sidewall. Collector cars often carry replacement tires of many different ages, and the number molded into an old casing is not always the best guide to what belongs on the car. Once the wheel size is verified, the decision becomes one of sidewall appearance, brand preference, and whether you want a general passenger-car bias-ply or a heavier-duty specialty option.

Plymouth P27-1, 27-2 & 27-3 tire options include blackwall, narrow whitewall, and wide whitewall styles in 670-15. Whitewall widths vary across the available products, with examples ranging from about 1 inch to much broader mid-1950s style whitewalls.

That variety lets the tire support very different presentation goals for the same Plymouth. A blackwall often suits a more understated factory look or a utilitarian build, while a narrow or wide whitewall can shift the car toward a stronger period visual statement. Matching the sidewall treatment to the trim, wheel covers, and overall restoration theme usually matters just as much as choosing the correct numeric size.

Plymouth P27-1, 27-2 & 27-3 tires in 670-15 are offered by Firestone, US Royal, Coker Classic, Universal Vintage Tire, BFGoodrich, Excelsior, Goodyear, Avon, and STA. The available products span several classic bias-ply series, including Firestone Classic Bias Ply, US Royal Classic Bias Ply, Silvertown Classic Bias Ply, Universal Classic Bias Ply, Super Cushion, Custom Super Cushion, Super Cushion Deluxe, Turbospeed Mk4, and Super Transport.

Brand choice on a collector Plymouth often comes down to the look you want, the sidewall style you prefer, and how closely you are trying to echo a mid-1950s tire character. Some buyers prioritize a well-known period brand name, while others focus on a particular whitewall width or a heavier-duty casing style, so it helps to compare the brand, series, and sidewall treatment together rather than shopping by name alone.

Plymouth P27-1, 27-2 & 27-3 has several distinct series available in 670-15, 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, Goodyear Super Cushion, Goodyear Custom Super Cushion, Goodyear Super Cushion Deluxe, Avon Turbospeed Mk4, and STA Super Transport. All are bias-ply constructions, but they differ in brand identity, sidewall treatments, load ratings in some cases, and whether the tire is presented as a general passenger-car style or a more specialized design.

For a Plymouth from 1955, the series choice shapes both appearance and character. A classic passenger-car bias-ply with the right whitewall width is usually the closest visual match for a stock restoration, while a more specialized series such as a transport-oriented tire may suit a different use case. Looking at series names alongside sidewall style and rim-width compatibility will usually narrow the choice faster than comparing tread names alone.

A Plymouth P27-1, 27-2 & 27-3 should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, ozone sources, and petroleum spills. Bias-ply tires on collector cars also benefit from being kept at proper inflation so the casing does not sit underinflated for long periods.

Long stationary periods are hard on any collector tire, so it helps to move the car occasionally or support it in a way that reduces prolonged flat spotting if the car will sit for months. Clean floors, tire covers, and routine pressure checks go a long way on a mid-1950s Plymouth that sees seasonal or occasional driving rather than daily road use.

Tires on a Plymouth P27-1, 27-2 & 27-3 should be inspected before each drive and more thoroughly several times a year. On a low-use collector car, that inspection should include air pressure, sidewall condition, tread surface, valve stems, and any signs of tube or rim issues such as uneven wear or unexplained pressure loss.

Collector cars often age their tires by time rather than mileage, so a Plymouth that looks fresh can still develop sidewall cracking, bead issues, or internal deterioration. A regular inspection routine also helps catch alignment or suspension problems early, since bias-ply tires can reveal wear patterns that point to mechanical issues well before the car sees many miles.

Tires on a Plymouth P27-1, 27-2 & 27-3 should be replaced when age, cracking, hardening, impact damage, casing distortion, repeated air loss, or other structural concerns appear, even if the tread still looks usable. Collector tires frequently reach the end of their safe service life long before the tread is worn out.

That is especially important on cars driven infrequently, because age-related deterioration can be easy to miss until the tire is under load at speed. If the Plymouth has old tires of uncertain age, a specialist inspection is worthwhile before regular road use, and any tube-equipped assembly should be evaluated as a complete unit rather than assuming the visible tread tells the whole story.

Plymouth P27-1, 27-2 & 27-3 is represented here with 670-15 bias-ply fitment for 1955, and the available products include period-style passenger-car bias-ply series from several brands. Those include blackwall, narrow whitewall, and wide whitewall versions, which reflects the kinds of visual treatments buyers associate with mid-1950s American cars.

For a precise factory-correct restoration, the tire size is only part of the answer. Sidewall width, brand preference, and the exact appearance expected for the specific car should be checked against period photos, showroom literature, surviving original examples, or Plymouth marque references. That extra research helps separate a generally correct tire from one that is correct for a judged restoration.

Correct tire fitment can absolutely affect how a Plymouth P27-1, 27-2 & 27-3 is judged and how convincingly it presents. Size, construction type, sidewall treatment, and overall stance all contribute to whether the car looks authentically mid-1950s or appears over-restored, under-restored, or simply mismatched.

On a car from this era, whitewall width can be just as noticeable as wheel covers or paint details, so tire choice has a strong visual impact. Buyers and judges often read the tire as part of the car’s story, which is why many restorers compare brand style, sidewall width, and wheel width carefully and then check their decisions against marque clubs or restoration standards for the specific Plymouth.

Plymouth P27-1, 27-2 & 27-3 tires are available in blackwall, narrow whitewall, and wide whitewall form, so more than one period-appropriate look exists within the 670-15 size. Mid-1950s American cars commonly appeared with whitewalls, but blackwalls also belong within the era depending on the car’s presentation and intended restoration style.

The most convincing choice comes from matching the tire to the exact tone of the build rather than assuming every restored Plymouth should wear the widest whitewall available. A carefully preserved driver may look right on blackwalls or narrower whites, while a more formal restoration may call for a broader whitewall treatment. Period brochures, photographs, and marque guidance are the best tie-breakers when several visually correct options are available.

A properly fitted, properly inflated, sound-condition bias-ply tire can be used for public-road driving in a Plymouth P27-1, 27-2 & 27-3 within the normal expectations of a mid-1950s collector car. These tires should be understood as period-style constructions, so their handling feel, tracking, and braking response differ from modern radial-equipped cars.

Safe road use depends on the entire vehicle, not just the tire itself. Before regular driving, the Plymouth should have its wheels, tubes, brakes, steering, suspension, and alignment checked so the tire is working with a mechanically sound chassis. A car set up correctly on bias-ply tires can be enjoyable on modern roads, but it should still be driven with the manners and margins appropriate to its era.

Before driving a Plymouth P27-1, 27-2 & 27-3, check tire inflation, visible sidewall condition, tread condition, wheel fasteners, and any sign of damage or air loss around the tube-type assembly. It is also wise to confirm that the tires are correctly matched as 670-15 on proper 15-inch wheels and that no wheel has been substituted with a non-matching size.

A short pre-drive routine matters on collector cars because they may sit for weeks and then go straight to road speed. Looking for flat spotting, cracks, loose trim that could contact the tire, and any unusual pull or vibration in the first few miles helps catch a problem early. On a bias-ply Plymouth, small setup issues often show themselves quickly through steering feel or uneven tracking.

A Plymouth P27-1, 27-2 & 27-3 on period-style bias-ply tires should be driven at prudent speeds that respect both the tire construction and the capabilities of a 1955 chassis. Even when the tire is new, the car will not respond like a modern vehicle on radial tires, especially in braking zones, crosswinds, or abrupt lane changes.

The sensible approach is to build speed gradually, keep extra distance in traffic, and treat touring pace as more important than highway urgency. Steering condition, alignment, inflation pressure, road crown, and load in the car all influence how comfortable the Plymouth feels at speed, so the appropriate pace is the one at which the car remains settled, predictable, and mechanically happy.