1955 Nash Tire Fitment Guide

1955 Nash vehicles use four different tire sizes depending on model: the Ambassador uses 710-15, the Metropolitan uses 520-13, the Rambler uses 640-15, and the Statesman uses 670-15. The Ambassador, Rambler, and Statesman all use 15-inch rims, while the Metropolitan uses a 13-inch rim. Listed rim-width ranges include 5.00 to 5.50 inches for 710-15, 3.50 to 4.00 inches for some 520-13 products, 4.00 to 5.00 inches across the 640-15 offerings, and 4.50 to 6.00 inches across the 670-15 offerings.

The practical takeaway is that a 1955 Nash buyer needs to identify the exact model before doing anything else. Three of the four models share a 15-inch wheel diameter, but they still do not use the same size, so you should not assume any 15-inch Nash tire is interchangeable across the full lineup. Once the model is confirmed, check the actual wheel on the car against the product's rim-width recommendation, especially if the car has had wheels changed during an older restoration.

On a 1955 Nash tire, 710-15 is a numeric bias-ply size. The 710 portion is the older nominal section-width code, and the 15 identifies the wheel diameter in inches. For 1955 Nash applications, that size belongs to the Ambassador and is offered as a bias-ply tire on 15-inch rims, with listed fitment ranges of 5.00 to 5.50 inches in rim width on the products that include width guidance.

That older numbering system does not read like a modern metric radial size, so it helps to think of it as an era-correct format for a mid-1950s full-size American car. If your Ambassador is being restored for authentic appearance, the numeric sidewall code and bias-ply construction are part of the visual character as much as the tread and whitewall treatment. Before choosing among blackwall and whitewall versions, confirm the actual wheel width so the tire matches both the model and the wheel.

No, 1955 Nash models do not all use the same tire size. The Ambassador uses 710-15, the Metropolitan uses 520-13, the Rambler uses 640-15, and the Statesman uses 670-15. Even among the three models that use 15-inch rims, each has its own size rather than sharing one common tire across the range.

That matters because many buyers know only the year and make when they start searching, but a 1955 Nash requires one more step. If you are working from an older registration, inherited car, or partly restored project, confirm the model badge, body size, and existing wheel diameter before selecting a tire. That extra check prevents a very common mistake with independent makes from the 1950s, where compact and full-size cars from the same brand can look related but use different tire fitments.

1955 Nash tires are available in several sidewall styles depending on size. The 710-15 size for the Ambassador is offered in blackwall and wide whitewall versions, 520-13 for the Metropolitan appears in blackwall and narrow whitewall, 640-15 for the Rambler is available in narrow and wide whitewall, and 670-15 for the Statesman comes in blackwall and wide whitewall. All of the listed offerings are bias-ply, which keeps the sidewall profile and overall look consistent with the period.

Sidewall choice changes the visual personality of a 1955 Nash more than many owners expect. Larger Nash sedans often look most at home with a substantial whitewall treatment, while the Metropolitan's smaller proportions can suit a narrower white stripe. Show standards can vary by body style, export market, and restoration philosophy, so if originality is the goal, compare your choice to factory literature or a marque club reference before settling on a blackwall or whitewall style.

Several brands cover the 1955 Nash range, but availability depends on the model's tire size. Ambassador-size 710-15 is offered by BFGoodrich and Firestone, Metropolitan-size 520-13 by Firestone and Premium Sport, Rambler-size 640-15 by BFGoodrich and Firestone, and Statesman-size 670-15 by Firestone, US Royal, Coker Classic, and Universal Vintage Tire. Every listed option for these sizes uses bias-ply construction.

Brand choice on a 1955 Nash is usually less about changing the fitment and more about choosing the look and presentation you want in the correct size. Some brands emphasize classic blackwall or wide-white styling that feels very at home on a 1950s American restoration, while others broaden the choices within a smaller-car application like the Metropolitan. Once you have the right size pinned down, compare the available sidewall treatments and rim-width recommendations before choosing between brands.

For a 1955 Nash Rambler in 640-15, both Firestone and BFGoodrich offer bias-ply tires, but the available sidewall treatments and rim-width ranges differ. BFGoodrich is listed in a wide whitewall version with a 4.00 to 4.50-inch rim-width recommendation and a 1190-pound maximum load at 32 psi. Firestone appears in wide whitewall and narrow whitewall versions, generally paired with a 4.50 to 5.00-inch rim-width recommendation, with most listed at 1190 pounds at 32 psi and one narrow whitewall version at 970 pounds at 32 psi.

That means the decision is usually about matching the wheel you have and the visual style you want on the car. A restorer trying to complement a particular wheel width may find one brand's fitment window more useful, while someone focused on sidewall appearance may prefer Firestone's broader whitewall selection in this size. It is wise to compare the actual wheel width on the Rambler before choosing between them, especially on a car that may have had wheel changes over the decades.

Rim-width guidance varies by tire size on 1955 Nash vehicles. The 710-15 size used on the Ambassador is listed for 5.00 to 5.50-inch rims. The 520-13 size used on the Metropolitan appears with 3.50 to 4.00-inch guidance on products that include it, 640-15 for the Rambler spans 4.00 to 5.00 inches depending on brand and sidewall version, and 670-15 for the Statesman spans 4.50 to 6.00 inches across the listed products.

Those ranges matter because the same nominal tire size can be offered by different brands with slightly different wheel-width windows. When a car has original steel wheels, that often makes the decision straightforward, but many collector cars have had replacements fitted during earlier repairs or custom work. Measuring the wheel before choosing a tire helps avoid mounting a correct size onto a rim that falls outside the recommendation for the specific product you want.

Original 1955 Nash wheels cannot be treated as universal across all tire sizes, because the lineup itself uses both 13-inch and 15-inch rims. The Metropolitan's 520-13 requires a 13-inch wheel, while the Ambassador, Rambler, and Statesman use 15-inch wheels in different widths depending on tire size and product. Matching wheel diameter is the first non-negotiable step before considering any brand or sidewall style.

Among the 15-inch Nash models, you still should not assume every original wheel works equally well with every tire option. The listed rim-width recommendations overlap in some places but are not identical across 640-15, 670-15, and 710-15 products. If the car is wearing its factory-type wheels, confirm the wheel width before moving between brands or whitewall styles, especially on a long-restored car where wheels may have been swapped from another Nash or another period vehicle.

A 1955 Nash should be stored in a cool, dry, dark space with the tires protected from direct sunlight, standing water, and ozone sources such as electric motors, battery chargers, welders, and compressors. Because all of the listed 1955 Nash fitments are bias-ply tires, long static storage can encourage flat-spotting more quickly than many owners expect. Keeping the tires properly inflated and rolling the car periodically helps reduce stress in one contact patch.

Collectors who store a 1955 Nash for a season at a time often use clean concrete, tire cradles, or stands placed correctly under the chassis to reduce prolonged load on the tires. If the car remains on its tires, moving it a short distance every few weeks is helpful. Avoid tire dressings that leave the sidewalls slick or overly glossy, since they can trap grime and make it harder to spot early cracking in a vintage-style bias-ply sidewall.

Tires on a 1955 Nash should be judged more by age and condition than by mileage. Collector cars often cover very few miles, so a tire can look usable in tread depth while still aging out in the casing and sidewall. A sound rule is to evaluate tires closely once they are around five to seven years old and to treat ten years as a serious replacement point, with the DOT date code used to verify age where present.

That age-based approach matters especially on a car that may spend most of its life in a garage and come out only for occasional drives or shows. If the car has sat for long periods, inspect for hardening, sidewall cracks, flat spots that do not round out, and any loss of air retention. Even a low-mile 1955 Nash deserves fresh tires once age becomes the dominant issue, because storage time can be tougher on vintage-style tires than actual road use.

Tires on a 1955 Nash should be inspected before every drive and again before any longer outing at sustained road speed. Look for sidewall cracking, tread separation, cuts, bulges, embedded debris, and uneven wear, then confirm that each tire is holding pressure consistently. Since these are collector-vehicle bias-ply applications, changes in feel, pull, or steering response should be taken seriously instead of dismissed as normal old-car behavior.

A monthly inspection routine is wise even when the car is not being driven. Check the spare as carefully as the road tires, because a decades-old spare may be the weakest tire on the vehicle. If the car has been in storage or has just come out for show season, give special attention to valve stems and bead areas and watch for any visible deformation from sitting in one position for too long.

A 1955 Nash Ambassador would have been fitted in the bias-ply era, and the correct size for the model in this guide is 710-15. That aligns with standard mid-1950s American practice, when bias-ply construction was still the normal original-equipment tire type across the market. Available replacements in that size continue that period construction and include blackwall and wide whitewall versions suited to different restoration styles.

For a factory-minded restoration, the key points are matching the model-specific size, preserving bias-ply construction, and choosing a sidewall treatment that suits the car's trim level and presentation. Original-equipment branding could vary by market and production practice, so it is smart to verify finer details through factory literature, period photography, or a Nash marque specialist. That extra step matters most if the car is headed for judged events rather than casual touring.

Correct tire fitment matters on a 1955 Nash because judges and knowledgeable enthusiasts often notice whether the size, construction type, and sidewall style match the car's era and model. A Metropolitan wearing a larger 15-inch Nash tire size, or a full-size Nash wearing the wrong numeric size, would stand out immediately. The same is true if the sidewall treatment looks out of character for the vehicle's intended presentation.

For show use, tire choice should support the story the car is telling. A preservation-minded car may call for a more restrained appearance, while a restored mid-1950s American sedan may look most natural with an appropriate whitewall. Event standards can differ, so owners aiming at concours-level judging should compare their choice against period advertising, club judging sheets, and model-specific references rather than relying on general 1950s styling assumptions alone.

For a 1955 Nash Statesman in 670-15, Firestone and Coker Classic both offer bias-ply fitments, but the listed details are not identical. Firestone appears as a blackwall with a 1450-pound maximum load at 32 psi and a 4.50 to 5.00-inch rim-width recommendation. Coker Classic appears as a wide whitewall with a 1550-pound maximum load at 32 psi and a broader 5.00 to 6.00-inch rim-width recommendation.

That difference gives a restorer two distinct paths without leaving the correct size. A blackwall Firestone can suit a plainer or more understated presentation, while the Coker Classic wide whitewall delivers a dressier 1950s look and may better match a wider wheel within its stated range. Since both are bias-ply tires, the choice is less about changing the car's period character and more about visual finish and wheel-width compatibility.

A properly selected, properly maintained tire in the correct 1955 Nash size can be used for normal road driving, but these applications are all bias-ply and should be treated with the manners and expectations of the period. Bias-ply tires typically track and respond differently than modern radials, and the car's own steering, braking, and suspension condition will often shape confidence more than the tire alone. Matching the correct size to the correct model is part of making the car behave as intended.

Highway use should be approached with the whole vehicle in mind, especially on a 1955 Nash that may still have vintage-style brakes and chassis tuning. A tire in excellent condition cannot compensate for worn kingpins, tired shocks, or poor alignment. Before any sustained highway trip, make sure the tires are the proper model-specific size, the pressures are set correctly, and the car feels stable at local-road speeds before moving up to longer, faster runs.

Inflation pressure on 1955 Nash tires should follow the vehicle's factory recommendation first and the tire manufacturer's rated pressure guidance second, rather than using one pressure for every size in the lineup. The listed maximum load figures are tied to specific products: 710-15 products show 1550 pounds at 32 psi, 520-13 examples include 770 pounds at 32 psi and 1100 pounds at 60 psi, 640-15 examples include 1190 pounds at 32 psi and 970 pounds at 32 psi, and 670-15 examples include 1450 pounds at 32 psi and 1550 pounds at 32 psi.

Those figures are not a blanket instruction to inflate every tire to the same pressure or to the sidewall maximum. A light Metropolitan and a larger Ambassador do not place the same demands on their tires, and even within one size there can be variation between products. Use the correct specification for your model, then confirm that the tire's own stated rating aligns with that use. If the car's manual and the tire's markings appear far apart, consult the tire maker or a knowledgeable vintage-tire specialist before driving.

Before taking a 1955 Nash on a longer drive, inspect each tire for cracks, weathering, cuts, exposed cords, bulges, and uneven wear, then verify cold pressure and make sure the spare is usable. Confirm that the tire size on the car matches the model, since a 1955 Nash lineup uses four different sizes and a mismatch can affect clearance and handling. A quick look at the valve stems, wheel condition, and any signs of bead leakage is also worthwhile.

That tire check should happen alongside a broader vintage-car once-over that includes brakes, steering play, fluid levels, and basic lighting. A collector car can feel fine on a short neighborhood run and still reveal problems once heat builds during a longer trip. If the Nash has been sitting, take it on a shorter shakedown drive first and pay attention to vibration, pull, and how quickly the tires round out after the first few miles.