Plymouth P17 Tires

Plymouth P17 uses 640-15 in the 1949 model year. Every listed tire for Plymouth P17 in this group is built for a 15-inch rim, and the available products are bias-ply designs. Depending on the specific tire, listed rim-width recommendations run from 4.00-4.50 inches or 4.50-5.00 inches, so the wheel itself should be checked against the individual tire specification.

That means the most important fitment steps are confirming that your Plymouth P17 still has 15-inch wheels and checking the rim width before settling on a particular product. After that, the choice becomes a matter of appearance and intended use, since Plymouth P17 tires in this size are available in blackwall, narrow whitewall, and wide whitewall styles.

On Plymouth P17, 640-15 is a traditional numeric bias-ply tire size. The 640 indicates the nominal section width with the decimal omitted, while the 15 is the wheel diameter in inches. In practical terms, it is a period-size code used on late-1940s American passenger cars rather than a modern metric radial designation.

Understanding that code helps keep a Plymouth P17 visually and mechanically in the proper era. When you compare products, treat 640-15 as the core fitment and then look at the individual construction details, sidewall style, and wheel-width recommendation to decide whether the tire suits a driver-quality car, a restoration, or a more formal show presentation.

Plymouth P17 tires in this listing are all bias-ply products in a numeric period size, and a tube is required. That follows the normal fitment practice for this style of collector tire and wheel combination. The tire itself may be the correct size, but tube selection still needs to match the same application and wheel diameter.

When fitting a Plymouth P17, make sure the wheel condition is suitable for tube-type service and that the installer is familiar with vintage tire mounting practices. Tube-related fitment is one of the details that affects long-term reliability on a collector car, especially one that sits for extended periods and is only driven occasionally.

Plymouth P17 tires in 640-15 are available with blackwall, narrow whitewall, and wide whitewall sidewall styles. The listed whitewall choices include 1.00-inch, 2.125-inch, 2.75-inch, and 3.00-inch treatments, depending on brand and series. All of them remain within period-style bias-ply construction for a late-1940s American passenger car.

That gives a Plymouth P17 owner some flexibility in how the car presents. A blackwall tire generally suits a more restrained or utility-minded look, while whitewall widths can push the car toward a more upscale postwar appearance. If originality matters, compare the sidewall treatment on your car with period photos, marque references, and the overall trim level you are trying to represent.

Plymouth P17 tires in the listed 640-15 size are available from BFGoodrich, Firestone, Avon, and Excelsior. Those brands appear across several bias-ply series, including Silvertown Classic Bias Ply, Firestone Classic Bias Ply, Super Safety Crossply, and Excelsior Bias Ply. The brand mix gives Plymouth P17 owners a choice between different visual styles and period-oriented construction families.

Brand choice on a Plymouth P17 often comes down to restoration goals, preferred sidewall appearance, and how closely you want the car to reflect a particular late-1940s presentation. Once the size and rim are confirmed, compare the brand-specific sidewall treatments, load figures where listed, and overall appearance rather than assuming every 640-15 tire will look exactly the same on the car.

Plymouth P17 has listed tire choices in several series: Silvertown Classic Bias Ply, Firestone Classic Bias Ply, Super Safety Crossply, and Excelsior Bias Ply. All are bias-ply offerings for 15-inch fitment, but they differ in branding, sidewall treatments, and in some cases load ratings and wheel-width recommendations. The Avon Super Safety Crossply also appears under a slightly different size notation, 640H15 83H, while remaining a 15-inch bias-ply option for this application.

For a Plymouth P17 owner, the practical difference is less about changing the basic fitment and more about choosing the look and character you want the finished car to have. Compare each series for sidewall style, stated load capacity where shown, and the wheel-width range, then match that against whether the car is being restored for authenticity, local driving, or a more formal show presentation.

A Plymouth P17 should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, ozone sources, and petroleum contamination. Keep the tires inflated to the appropriate operating pressure for the fitted tire and avoid letting the car sit for long periods on underinflated casings. Clean, stable floors are better than dirt or damp surfaces.

For longer-term storage, moving a Plymouth P17 periodically helps prevent flat spotting in bias-ply tires. Many collector owners also reduce stress on the tires by using cradles or by taking some weight off the suspension during extended layups, while still supporting the car correctly. Good storage habits matter as much as tread depth on a low-mileage postwar car.

Tires on a Plymouth P17 should be inspected before every meaningful drive and more thoroughly several times during the season, even if the car covers very few miles. Check inflation, tread wear, sidewall cracking, bead area condition, valve stems, and any signs of impact damage or tube-related air loss. Bias-ply collector tires can age visibly and structurally even when they are not used often.

A regular inspection routine is especially important on a Plymouth P17 because collector cars spend more time parked than commuting. Catching a pressure loss, casing defect, or wheel issue early is far easier than dealing with damage on the road. If the car develops vibration, wander, or a change in steering feel, inspect the tires and wheels before driving farther.

Tires on a Plymouth P17 should be replaced when age, cracking, hardening, impact damage, uneven wear, or prolonged storage history makes the casing questionable, even if the tread still looks usable. Collector tires often age out before they wear out. Any tire with visible structural deterioration, chronic air loss, or signs of internal separation belongs on the replacement list immediately.

That is particularly true for a Plymouth P17 that sees occasional use, because low annual mileage can hide age-related deterioration. Tread depth alone is not a reliable guide on a collector car. If there is any doubt about the condition of an older set, have the tires and wheels evaluated by a shop familiar with vintage bias-ply applications before putting the car back into regular road service.

Plymouth P17 is listed here with one period tire size, 640-15, on 15-inch wheels. The available replacement choices include several bias-ply series rather than a single original-equipment specification, with blackwall and whitewall variations both represented. That means the size itself is the clearest fixed point, while the exact brand and sidewall treatment should be matched to the individual car’s restoration goal.

If you are restoring a Plymouth P17 for accuracy, start with the 640-15 size and then compare surviving evidence from your car with period literature and marque-club references. Sidewall style can change the visual character of a postwar Plymouth significantly, so the right answer may depend on how your specific car was delivered or how you intend it to be judged.

Correct tire fitment can absolutely affect how a Plymouth P17 is judged and how seriously the restoration is taken. On a postwar American car, the right size, proper bias-ply construction, and an era-appropriate sidewall treatment all contribute to authenticity. Even when the wheel diameter is correct, a visibly modern-looking replacement can change the car’s stance and overall impression.

For a Plymouth P17 headed to judged events, tire selection should be treated as part of the restoration rather than as a purely maintenance item. Marque clubs, period photos, and judging standards are useful references for deciding whether blackwall, narrow whitewall, or a wider whitewall is most appropriate for the presentation you want the car to carry.

Plymouth P17 tires in the correct 640-15 size are offered in blackwall, narrow whitewall, and wide whitewall styles. All of those treatments are period-style choices within the late-1940s passenger-car world, but the most accurate look for a specific Plymouth P17 depends on how that car was equipped and how formal or upscale the finished restoration is meant to appear.

A restoration-minded Plymouth P17 owner should choose sidewall style with the same care given to paint or trim details. Blackwall usually creates a more restrained appearance, while whitewalls make a stronger postwar styling statement. If authenticity matters more than personal preference, compare your intended tire style with original photographs, trim level cues, and club guidance for the exact presentation you want.

A correctly fitted, properly maintained bias-ply tire can be appropriate for driving a Plymouth P17 on public roads, provided the rest of the car is in sound mechanical condition. The listed Plymouth P17 tires are period-style bias-ply designs for 15-inch fitment, so they suit the character of the car. Safe use depends on correct inflation, proper wheel condition, sound tubes, and the absence of age-related deterioration.

The real-world implication is that a Plymouth P17 should be driven within the limits of a late-1940s car on vintage-style tires, not as though it were on modern radials. Before regular road use, make sure the steering, brakes, suspension, and alignment are also sorted. Tire safety on a collector car is always tied to the total condition of the vehicle.

Before driving a Plymouth P17, check tire pressure, visible sidewall condition, tread condition, valve stems, wheel hardware, and any sign that a tube-type tire has lost air since the last outing. Look for cuts, bulges, weather checking, or uneven wear that could point to an alignment or suspension problem. On a bias-ply car, even small changes in inflation or casing condition can noticeably affect how the car tracks.

A short pre-drive walkaround goes a long way with a Plymouth P17 because collector cars often sit for stretches between uses. If the car has been parked for a while, also pay attention to any flat spotting during the first miles and to any pull, shimmy, or vibration. Those signs should be investigated before the drive becomes a longer trip.

A Plymouth P17 fitted with period-style bias-ply tires should be driven at moderate, sensible speeds that respect the design of both the car and the tires. Even with a correct new-production collector tire, the handling and braking behavior of a 1949 Plymouth P17 remain very different from a modern car on radial tires. Road speed should always be matched to tire condition, inflation, load, road surface, and the overall state of the chassis.

In practice, that means treating a Plymouth P17 as a vintage road car rather than a high-speed cruiser. Leave a generous margin for braking and steering response, and avoid sustained fast running if the car has older components or any unanswered tire-condition questions. Conservative speed is one of the simplest ways to preserve both safety and the long-term health of a collector Plymouth.