1957 Plymouth Tire Fitment Guide

1957 Plymouth vehicles in this guide use two tire sizes: 750-14 and 800-14. Both sizes apply to the full model range covered here, including the 1957 Plymouth Belvedere and the 1957 Plymouth Plaza & Savoy group. Each size mounts on a 14-inch wheel, with available product fitments showing 750-14 on 5.00 to 5.50 inch rims and 800-14 on 5.00 to 6.00 inch rims where rim-width guidance is listed.

That means the first fitment question is not Belvedere versus Savoy or Plaza, but which of the two 14-inch sizes belongs on your particular car as equipped. Checking the tire size already on the car, the wheel width, and any restoration goal for stance or sidewall appearance is the fastest way to narrow the correct choice before moving on to a specific product.

A 750-14 on a 1957 Plymouth is a numeric bias-ply size used in period American tire sizing. The 7.50 designation refers to the tire's nominal width class, while the 14 identifies the wheel diameter in inches. It is not a modern metric radial code, so it should be read as a vintage sizing format intended for a bias-ply tire and a 14-inch wheel.

That matters because a 750-14 should be compared with other vintage-format sizes, not with modern P-metric markings that describe width and aspect ratio differently. When you see 750-14 on a Plymouth from this era, the next useful checks are the tire's approved rim width range, the sidewall style you want, and whether the car is being restored for authenticity or simply kept visually true to the late-1950s period.

The 1957 Plymouth models covered here share the same two tire size options: 750-14 and 800-14. That includes the Belvedere as well as the Plaza & Savoy group, and both sizes are bias-ply 14-inch fitments. Plymouth did not split these models into separate size families within this guide, so the same basic tire menu appears across the full year-and-make range.

Shared size coverage does not mean every surviving car should automatically move between the two without a second look. Older cars often carry replacement wheels or long-ago tire changes, so the smart step is to inspect the actual wheel width and the size already fitted before choosing between 750-14 and 800-14 for your own 1957 Plymouth.

Both 750-14 and 800-14 are correct-format bias-ply choices for 1957 Plymouth vehicles in this guide, and both fit 14-inch wheels. The main difference is size class, not construction type, since neither option shifts you into a radial. Available 750-14 products cover 5.00 to 5.50 inch rim widths, while 800-14 products extend to 5.00 to 6.00 inch rim widths where the published range appears.

Choosing between them comes down to matching the car's existing wheel and preserving the look you want on the car. A Plymouth already set up around the narrower size should stay there unless wheel measurements support a change, while a car using the larger size should keep that size for consistent stance and period character. Treat the current fitted size and wheel width as your best starting point.

1957 Plymouth tires are available with several period-style sidewall treatments. In 750-14, choices include narrow whitewall, wide whitewall, and redline. In 800-14, choices include blackwall, narrow whitewall, and wide whitewall. All of those offerings stay within bias-ply construction, which keeps the overall character appropriate for a late-1950s American car.

Sidewall style changes the car's visual attitude more than many owners expect, especially on a fin-era Plymouth with substantial body side trim and open wheel arches. Wide whitewalls usually deliver the strongest period statement, narrow whitewalls read a bit more restrained, redlines create a sportier custom-era accent, and blackwalls suit a plainer presentation. The right choice depends on how original, upscale, or understated you want the finished car to appear.

Several vintage-focused brands offer tires for 1957 Plymouth vehicles. The 750-14 size includes BFGoodrich, US Royal, and Coker Classic offerings, while 800-14 includes BFGoodrich and Universal Vintage Tire. Every listed option remains in bias-ply construction, which is consistent with the period these Plymouth models came from.

Brand choice usually comes down to the combination of size, sidewall treatment, and published fitment details rather than a simple make-versus-make decision. One brand may offer the whitewall width or redline look you want in 750-14, while another may better match the appearance you need in 800-14. Once the correct size is settled, compare the available sidewall styles and load information within that size.

Published fitment guidance for 1957 Plymouth tires shows that 750-14 products are intended for 5.00 to 5.50 inch rim widths. For 800-14, the listed range extends from 5.00 to 6.00 inches on the products that include a rim-width specification. Both sizes use a 14-inch rim diameter, so width is the dimension that needs the closer check once the wheel diameter is confirmed.

That distinction matters on older cars because replacement wheels are common, even when the wheel still looks factory at a glance. Measuring the wheel and matching it to the chosen tire's approved range helps preserve proper shape and footprint. If your car sits near the upper or lower limit of a published range, compare the exact product's recommendation rather than assuming every tire in that size behaves the same way.

The available 1957 Plymouth tire listings do not show tube-type or tubeless markings in the size descriptions, so tube use should be confirmed from the specific tire's sidewall marking and the wheel itself. Both 750-14 and 800-14 are offered as vintage-style bias-ply products, and with cars of this age the wheel condition is just as important as the tire construction when deciding on tube use.

Older original wheels may have corrosion, surface damage, or design details that affect whether a tubeless setup is appropriate in practice. If you are trying to keep original wheels in service, inspect the bead seats, valve stem area, and overall wheel condition before final assembly. Matching the tire to a sound wheel and confirming tube guidance on the exact product will prevent avoidable installation issues.

Both tire sizes listed for 1957 Plymouth vehicles use a 14-inch rim diameter, so original 14-inch wheels can often accept either 750-14 or 800-14 from a diameter standpoint. Rim width is the key second check. The published range for 750-14 runs from 5.00 to 5.50 inches, while 800-14 products reach 5.00 to 6.00 inches where width guidance is listed.

That means a 14-inch Plymouth wheel is only part of the answer; the wheel's width must still suit the tire you choose. A car wearing replacement wheels from another Mopar or a later service wheel may still be 14 inches across yet differ in width enough to influence the correct tire size. Verify the actual wheel before assuming both sizes are equally suitable on the car.

A 1957 Plymouth should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, welders, furnaces, and other ozone-producing equipment. Bias-ply tires are especially prone to temporary flat-spotting when a collector car sits in one position for long periods. Keeping the tires properly inflated and moving the car occasionally helps reduce casing stress during storage.

Long-term storage habits affect both appearance and drivability on a fin-era Plymouth that may only come out for shows or fair-weather drives. If the car will sit for months, some owners use stands to reduce load on the tires, but that should be done carefully and with proper support points. Even when stored indoors, inspect the sidewalls and tread before returning the car to regular use.

Tires on a 1957 Plymouth should be judged more by age and condition than by miles traveled. Collector cars often see limited annual use, so the tire can age out long before the tread appears worn. A sensible practice is to begin evaluating tires closely once they are around five to seven years old and to treat the ten-year mark as a serious replacement consideration, regardless of remaining tread.

The tire's date code, sidewall condition, pressure retention, and any signs of cracking or hardening matter more than odometer readings on a hobby car. A Plymouth that spends most of its life indoors may still carry old tires that look acceptable at first glance but are no longer a wise road choice. Age-based replacement thinking is especially important before highway travel or event driving.

Tires on a 1957 Plymouth should be inspected before every drive and again before any extended outing. Look for sidewall cracking, tread wear, bulges, cuts, weathering, and any sign that the tire is losing pressure between uses. On an older collector car, valve stems and the condition of the spare deserve the same attention as the four tires on the ground.

Short local trips often hide problems that become much more obvious once the car is driven farther or at sustained road speed. A quick walk-around before each outing can catch underinflation, visual damage, or age-related deterioration early. That simple habit is one of the easiest ways to keep a 1957 Plymouth dependable for occasional cruising, shows, and weekend drives.

A 1957 Plymouth Belvedere would have been a bias-ply car when new, which aligns with the 750-14 and 800-14 bias-ply sizes offered here for the 1957 Plymouth range. Both sizes are period-format 14-inch fitments, and sidewall treatments such as whitewalls were entirely at home on upscale late-1950s American cars. No original-equipment brand should be assumed solely from modern reproduction availability.

For a restoration, the most important first step is matching the construction type, size, and sidewall character that suit your exact car and the way it is being judged or presented. If the car has a known ownership history, original paperwork, or surviving period photos, use those clues along with marque-club advice to decide whether 750-14 or 800-14 best reflects how your Belvedere was originally equipped.

Correct tire fitment matters on a 1957 Plymouth because judges and knowledgeable enthusiasts notice size, construction, and sidewall presentation quickly on a car from this era. A period-format bias-ply tire supports the visual character the car was designed around, while an obviously different sidewall treatment or size can change the car's stance and appearance. Whitewall width can also influence how authentic the finished restoration looks.

That does not mean every event uses identical standards, but it does mean tire choice should be intentional rather than incidental. A Plymouth built for concours-level originality may need a different visual treatment than one restored as a clean driver or period custom. Event rules, marque clubs, and factory literature are the right places to confirm whether a specific whitewall or redline style suits your restoration goal.

Within the 750-14 size for the 1957 Plymouth, BFGoodrich and US Royal both offer bias-ply tires for 14-inch wheels with published rim-width ranges of 5.00 to 5.50 inches. BFGoodrich narrow whitewall examples list a maximum load of 1580 pounds at 32 psi, while US Royal examples list 1500 pounds at 32 psi. US Royal also appears in both narrow whitewall and redline forms, while BFGoodrich appears in narrow whitewall in the listings here.

The practical difference is less about basic fitment and more about sidewall presentation and the published load figure attached to the specific tire. If your goal is a certain visual style, the brand may be chosen by the sidewall you want rather than by size alone. Compare the exact 750-14 product you are considering instead of assuming every tire in that size has the same appearance or published specifications.

The 1957 Plymouth tires listed here are bias-ply products, and no explicit speed ratings are shown in the available size markings. A properly selected, properly inflated, and age-sound bias-ply tire can serve normal collector-car road use well, but its behavior will remain true to vintage construction rather than modern radial expectations. On a 1957 Plymouth, the condition of the car's brakes, steering, suspension, and alignment is often just as important to highway confidence as the tire itself.

Highway use should be approached with a realistic understanding of the entire vehicle, not only the sidewall. A well-sorted Plymouth driven within the limits of its age and setup is a very different proposition than a long-stored car returning to the road on old tires. Before regular highway driving, confirm the tire age, inspect for deterioration, and make sure the rest of the chassis is equally ready for sustained speed.

Available load-and-pressure figures for 1957 Plymouth tires show 750-14 products listed at up to 1500 pounds at 32 psi or 1580 pounds at 32 psi, depending on the tire, while 800-14 products shown here list up to 1620 pounds at 32 psi where load data appears. Those figures are tire ratings, not automatic vehicle settings. The factory-recommended pressure for the car should still come from Plymouth literature for the exact model and use case.

The key point is not to transfer one pressure assumption from one size or product to another. A reproduction bias-ply tire's load table gives useful limits, while the car's own recommended setting governs how it should typically be run in service. Start by matching the exact tire size on the car, then verify the product's published rating and compare it with the owner's manual or a trusted Plymouth service reference.

Before a longer drive in a 1957 Plymouth, inspect all five tires for cracking, cuts, bulges, uneven wear, and proper inflation, and do the same for the spare. Confirm that the valve stems are sound and that the wheels show no obvious damage at the bead or lug area. Because these cars are often driven infrequently, age and storage effects can matter as much as visible tread condition.

A tire check should be part of a broader pre-trip inspection that also covers brakes, steering, suspension, wheel bearings, fluids, and lighting. On an older Plymouth, a car that feels fine on short neighborhood loops may reveal problems only after heat and mileage build on a longer route. Spending a few extra minutes before departure is far easier than dealing with a roadside problem in a vintage car.