1956 Ford Zephyr Tires

The 1956 Ford Zephyr uses two recognized tire sizes: 640-13 in bias-ply form and 175R13 in radial form. Both are 13-inch fitments, so the choice is not about changing wheel diameter as much as deciding which construction and sizing system matches the car's present setup and the owner's goals.

A buyer should first confirm which tire style is already on the car and whether the wheels are suitable for that setup. A Zephyr being restored with a traditional look may stay with 640-13, while a car already running radial-style sizing may point toward 175R13 or another approved radial equivalent after checking wheel width and clearance.

The tire sizes associated with the 1956 Ford Zephyr use a 13-inch rim diameter. That applies to both the 640-13 bias-ply size and the 175R13 radial size, which keeps the wheel diameter consistent even though the tire constructions and sizing formats differ.

Rim diameter is only part of the fitment picture, especially on a collector car that may have had wheels changed over the years. Verifying the actual wheel width on the car is important before choosing a replacement, particularly if moving from the original-style bias-ply size to a radial equivalent that may call for a broader approved rim-width range.

The 1956 Ford Zephyr Eotta follows the same fitment pattern as the model core, with 640-13 bias-ply and 175R13 radial sizes both associated with the sub-model. That means the basic tire decision remains the same: traditional numeric bias-ply sizing or a radial-format alternative on the same 13-inch rim diameter.

That shared fitment makes sub-model selection fairly simple, but it does not remove the need to inspect the car itself. Older Zephyrs may have replacement wheels, suspension work, or long-standing tire substitutions, so checking the actual wheel width and the tire currently on the car helps prevent choosing a size path that does not match the existing setup.

On the 1956 Ford Zephyr, 640-13 is a bias-ply tire size. It uses the older numeric sizing convention common to period applications, and it is the traditional fitment path for owners who want the car to retain a more vintage tire profile and presentation.

That matters because a bias-ply tire is not the same thing as a modern radial, even when both fit the same wheel diameter. Anyone replacing 640-13 tires should decide early whether the goal is to preserve the original-style construction or move to one of the available radial equivalents, then verify wheel width, clearance, and overall setup before making the change.

Radial equivalents for 640-13 include 175R13, P175/75R13, P185/70R13, and 650R13. In that group, 175R13 is the 80-series metric radial option, P175/75R13 is the 75-series P-metric choice, P185/70R13 is the 70-series P-metric alternative, and 650R13 is the bias-look radial.

Those sizes give the Zephyr owner several ways to approach a radial conversion without changing the 13-inch rim diameter. Even so, an equivalent should be treated as an alternative rather than an automatic substitute, so the actual wheel width, tire-to-fender clearance, and the car's intended appearance should all be checked before settling on one radial size.

Start by confirming the current wheel diameter and width, then compare the radial size being considered against the Zephyr's existing space around the fenders, steering, and suspension. For a 640-13 conversion path, the recognized radial alternatives include 175R13, P175/75R13, P185/70R13, and the 650R13 bias-look radial.

Construction changes can also affect the car's visual character, so the decision is not only mechanical. A carefully restored Zephyr may call for the traditional look of a bias-ply tire, while a road-use car may be better served by a radial-style setup, provided the wheels, clearances, and general chassis condition are checked before the new tires go into service.

The first priority is staying with the correct 640-13 size if the Zephyr is being kept in its traditional bias-ply fitment. From there, the meaningful differences are construction style, sidewall presentation, tire series, rim-width compatibility, and whether the tire supports the car's intended use as a restoration piece or a regularly driven collector vehicle.

The available 640-13 product choice here is a BFGoodrich bias-ply in the Silvertown Classic Bias Ply series with a 2.25 inch wide whitewall. That makes appearance especially important, but wheel width still needs attention, since the tire is built around a 4.00 to 4.50 inch rim-width range rather than every 13-inch wheel that might happen to be on the car.

The sidewall style shown in the available 640-13 Zephyr tire offering is a wide whitewall, specifically a 2.25 inch whitewall. That gives the 1956 Ford Zephyr a distinctly period-style appearance and is often the most visually important difference for buyers who are trying to complement the car's mid-1950s character.

Sidewall choice should still be balanced against the actual tire size and construction on the car. A wide whitewall may be the right visual direction for a restoration-oriented Zephyr, but the owner should make sure the car is staying with the 640-13 bias-ply setup rather than a radial alternative, since appearance and construction decisions are closely tied on this application.

BFGoodrich is represented among the available tire choices for the 1956 Ford Zephyr in the 640-13 size. That offering is a bias-ply tire in the Silvertown Classic Bias Ply series, aimed at buyers who want a traditional vintage-size replacement rather than a modern-looking radial presentation.

Brand matters, but it should come after size, construction, and wheel compatibility in the selection process. On a car like the Zephyr, the more important question is whether the tire supports the intended look and fitment path, so a buyer should match the brand option to the correct 13-inch size family and inspect the wheel setup before finalizing the choice.

For a period-style 1956 Ford Zephyr, the 640-13 bias-ply size is the natural starting point because it preserves the older numeric sizing format and traditional construction associated with the car's era. It also aligns with the available bias-ply product offering aimed at vintage appearance rather than a modern radial look.

That does not automatically make every 640-13 presentation historically exact for every restored Zephyr. Owners pursuing strict originality should compare tire details against period photos, marque-club knowledge, and other vehicle-specific references, while buyers focused on the right general mid-1950s appearance can use the correct size and construction as the most important foundation.

Tire construction has a major effect on how a restored 1956 Ford Zephyr presents. A 640-13 bias-ply setup gives the car a more traditional visual character, while a 175R13 or other radial equivalent tends to move the appearance toward a later replacement style even when the wheel diameter remains 13 inches.

That visual difference is often as important as the mechanical choice on a restoration-oriented car. Buyers who want the Zephyr to read as convincingly mid-1950s usually start with the proper bias-ply size family and then choose sidewall treatment carefully, while owners building a driver may accept a radial-style look in exchange for a different road-use approach.

Yes, modifications can change tire fitment on a 1956 Ford Zephyr even when the nominal tire size seems correct. Aftermarket wheels, different wheel widths, suspension changes, lowering, brake upgrades, or body repairs can all alter the space available for a 640-13 bias-ply tire or a 175R13-style radial alternative.

A classic car should be inspected as it sits rather than assumed to match stock dimensions. Measuring the actual wheel diameter and width, checking lock-to-lock steering clearance, and looking at fender and suspension space are smart steps before mounting new tires, especially if the car is moving from a long-used bias-ply setup to one of the available radial equivalents.

Before driving a 1956 Ford Zephyr on new tires, inspect the wheels for correct diameter and sound condition, confirm that each tire is seated properly, and make sure there is no rubbing at the fenders, suspension, or steering components. Tire pressure, valve condition, and basic alignment symptoms also deserve attention before the first road test.

A short, careful initial drive is the best way to confirm that the setup behaves normally. Listen for contact, watch for pulling or vibration, and recheck pressure after the car has been driven, since collector vehicles often return to the road after long periods of storage and may reveal wheel, brake, or suspension issues once new tires are installed.

640-13 tires on a collector 1956 Ford Zephyr should be maintained with regular pressure checks, visual inspections for cracking, bulges, cuts, and uneven wear, and periodic checks for slow air loss. Cars that sit for extended periods need extra attention because age and storage conditions can affect tire condition long before tread wear becomes significant.

Storage habits make a real difference on low-use classics. Keeping the Zephyr away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, and rolling the car occasionally can reduce prolonged static loading. Any sign of sidewall deterioration or persistent pressure loss should be evaluated before the car is taken on regular road use.