1949 Plymouth P17 Tires

The 1949 Plymouth P17 uses a 640-15 tire size as its primary fitment. That is a vintage numeric bias-ply size on a 15-inch rim, and the covered Deluxe 6 Cyl. sub-model uses the same basic size, so the vehicle does not branch into multiple primary tire sizes within this fitment.

That makes the next step less about choosing between sizes and more about choosing the right version of 640-15 for the car. Owners should still confirm the actual wheel diameter and current setup, especially if the car has had wheels changed over the years or has been modified during an older restoration.

The 1949 Plymouth P17 uses a 15-inch rim with its 640-15 tire fitment. The tire size itself also reflects that wheel diameter, since the final number in 640-15 identifies the rim diameter in inches rather than a modern metric sizing convention.

Wheel diameter should be confirmed before replacing tires, because a collector car may no longer be wearing its expected wheels. It is also worth checking wheel width against the tire being considered, particularly when comparing different product series or looking at a radial-equivalent alternative instead of staying with the original-style bias-ply construction.

On a 1949 Plymouth P17, 640-15 is a numeric bias-ply size. The 640 refers to an approximate 6.40-inch nominal section width, while the 15 identifies the wheel diameter in inches, making it part of the older sizing language common on late-1940s American cars.

Understanding that format helps when comparing modern alternatives, because it does not read like a newer radial size such as 175R15 or P175/75R15. A buyer deciding between period-style bias-ply tires and radial equivalents should use the original 640-15 size as the starting point, then verify wheel width and vehicle clearance before changing construction.

For the 1949 Plymouth P17, 640-15 is a bias-ply tire size. The available primary fitment in this size stays in vintage bias-ply construction, which matches the car’s era and gives the owner access to traditional blackwall and whitewall presentations in several classic series.

That matters because keeping a bias-ply tire preserves the period-style sizing and look, while moving to a radial means stepping into an equivalent-size decision instead of a primary fitment choice. Owners considering that change should confirm wheel width, compare dimensions carefully, and make sure steering and fender clearance remain appropriate for the car’s actual setup.

Radial equivalents for 640-15 include 175R15, P175/75R15, and P185/70R15. Those represent three different radial sizing approaches: an 80-series metric radial, a P-metric 75-series radial, and a P-metric 70-series radial, giving the buyer a useful spread of modern-format alternatives.

Each of those sizes should be treated as an alternative to evaluate rather than an automatic substitute. A 5-6 inch rim width range is associated with these radial equivalents, and the owner should also compare the wheel diameter, actual wheel width, and available clearance before choosing one for a 1949 Plymouth P17.

Start by confirming the car’s actual wheel diameter and wheel width, then compare the radial-equivalent size being considered for the 640-15 fitment. On a 1949 Plymouth P17, suitable radial alternatives exist, but they belong to different sizing systems and should be evaluated against the wheel and vehicle rather than assumed to interchange automatically.

Clearance at the fenders and steering components deserves close attention, especially on a car that may have seen wheel changes or suspension work over the years. The owner should also think about the goal of the car: a restoration-oriented Plymouth often benefits from traditional bias-ply appearance, while a road-driven car may justify a carefully checked radial alternative.

The first consideration is staying with the correct 640-15 size on the proper 15-inch wheel. From there, the decision usually comes down to whether the Plymouth should remain on a traditional bias-ply tire for a period-style presentation or whether a radial equivalent is being considered for a different driving approach.

Within the available 640-15 bias-ply choices, compare sidewall style, brand, tire series, rim-width compatibility, and load figures where they are stated. A car being restored to look at home in the late 1940s may call for one visual approach, while a regularly driven car may push the owner to weigh appearance against practical road-use preferences.

The 1949 Plymouth P17 has 640-15 tire choices in blackwall, narrow whitewall, and wide whitewall styles. That gives the owner a broad appearance range, from a restrained blackwall look to more formal whitewall presentations that suit many postwar American cars and restoration themes.

Sidewall style should be chosen with the car’s intended presentation in mind rather than treated as a purely cosmetic afterthought. Whitewall width has a strong effect on how a late-1940s Plymouth sits visually, so it helps to consider the wheel covers, trim level, and restoration direction before selecting between a blackwall, a narrower stripe, or a broader whitewall.

Available 640-15 tires for the 1949 Plymouth P17 come from BFGoodrich, Firestone, Avon, and Excelsior. Those brands appear across several classic bias-ply series, giving the buyer options in both appearance and product character without stepping outside the correct primary size for the car.

Brand choice should be weighed alongside the details that change how the tire looks and mounts, such as sidewall style and recommended rim-width range. The better comparison is not simply one brand against another, but which 640-15 tire matches the Plymouth’s wheel setup, restoration style, and expected use on the road.

A period-style 1949 Plymouth P17 starts with the original-era 640-15 bias-ply size on a 15-inch rim. Staying in that sizing and construction keeps the car visually anchored in the late 1940s, and the available bias-ply choices give room to shape the final look through blackwall, narrow whitewall, or wide whitewall presentation.

The best visual match depends on how the Plymouth is being restored and how formal or understated the finished car should appear. When exact originality matters, it is wise to compare the tire choice against authoritative Plymouth references, period photos, or marque-club guidance rather than assuming any one sidewall treatment is automatically correct.

Tire construction changes more than ride character on a restored 1949 Plymouth P17; it also changes how the car presents. A 640-15 bias-ply tire preserves the traditional sizing language and visual character associated with a postwar Plymouth, while a radial equivalent introduces a more modern construction even when the dimensions are chosen carefully.

That difference matters most on a car where stance, sidewall shape, and overall period impression are part of the restoration goal. Owners who want a strongly traditional look usually begin with the bias-ply fitment, while those considering a radial should judge the visual tradeoff just as carefully as the practical fitment details.

Yes, modifications can affect tire fitment on a 1949 Plymouth P17 even when the intended size remains 640-15. Changes to wheels, wheel width, ride height, suspension components, or body clearance can alter how much space the tire has and whether a radial-equivalent alternative remains suitable for the car.

That is why a modified Plymouth should be checked as an individual vehicle before new tires are selected. Measuring the actual wheel, confirming the wheel diameter, and inspecting clearance at full steering lock can prevent choosing a tire that matches the cataloged size but does not suit the way the car now sits.

Before driving a 1949 Plymouth P17 on new tires, inspect the wheels for condition and correct diameter, make sure the tires are properly mounted and inflated, and look over the suspension and steering for looseness or wear. A collector car that has spent long periods parked deserves extra attention before returning to regular road use.

It also helps to check for even clearance around the fenders and during steering movement, especially if the car has older repairs or non-original wheels. After the first few drives, recheck inflation and give the tires a visual inspection for any signs of rubbing, unusual wear, or air loss as the setup settles in.

640-15 tires on a collector 1949 Plymouth P17 should be kept at the proper inflation for the tire and inspected regularly for cracking, cuts, bulges, irregular wear, and slow air loss. Because older collector cars may sit for extended periods, maintenance is often as much about storage and periodic inspection as about mileage.

A Plymouth stored away from prolonged heat, direct sunlight, moisture, and ozone sources gives its tires a better chance of aging evenly. It is also smart to look at the tires before any longer drive, since a low-use car can develop issues that are easy to miss when tread wear alone is used as the measure of condition.