1956 Standard Eight Tires

The 1956 Standard Eight is associated with two tire sizes: 520-13 in bias-ply construction and 145R13 in radial construction. Both are tied to the same vehicle and both use a 13-inch rim, so the fitment question is less about wheel diameter and more about which tire construction and style direction suits the car.

A 520-13 choice keeps the vintage numeric bias-ply format, while 145R13 moves into a Euro-metric radial format. The better option depends on the wheels actually on the car, the appearance you want, and whether the Standard Eight has remained stock or has been altered over the years.

The 1956 Standard Eight uses a 13-inch rim with both of its associated tire sizes, 520-13 and 145R13. That common rim diameter simplifies the basic wheel-size question, since the decision is not between different rim diameters but between different tire constructions and sizing systems.

Rim diameter is only the first check. Wheel width still matters, especially if the car has replacement wheels or if you are considering a radial equivalent for the 520-13 size. Looking at the actual wheel on the car before selecting a tire helps avoid clearance and compatibility surprises.

The 1956 Standard Eight Base is associated with the same two fitment paths as the model core: 520-13 in bias-ply construction and 145R13 in radial construction. There is no separate tire-size split within the covered Base sub-model that changes the basic 13-inch wheel fitment direction.

That means the selection process centers on construction, appearance, and the wheel setup on the specific car. A Base model kept in a restoration-oriented style may lean toward 520-13, while a driver-oriented setup may lead you toward 145R13 or one of the radial equivalents tied to the bias-ply size.

520-13 is a bias-ply tire size for the 1956 Standard Eight. It uses a vintage numeric sizing format that suits the era of the car and is offered in bias-ply products with blackwall, narrow whitewall, and wide whitewall presentations.

Choosing 520-13 usually means the owner is prioritizing a traditional look and an older-style tire format. If the goal is to keep that visual character while exploring other constructions, the radial-equivalent sizes tied to 520-13 should be reviewed carefully against wheel width, overall dimensions, and clearance on the car.

Radial equivalents for 520-13 include 155R13, P155/75R13, and P155/70R13. Those cover three different radial sizing approaches: an 80-series metric radial, a 75-series P-metric radial, and a 70-series P-metric radial, each offering a useful comparison to the original bias-ply size.

A recommended rim-width range of 4 to 5 inches applies to these equivalent radial paths. Even though they are recognized equivalents, they still need to be checked against the wheel and vehicle setup, especially if the Standard Eight has non-original wheels, altered ride height, or tight fender and steering clearance.

That decision depends on how the 1956 Standard Eight will be used and how closely you want it to reflect a period-style presentation. The bias-ply path is 520-13, while the radial path includes 145R13 and radial equivalents associated with 520-13 such as 155R13, P155/75R13, and P155/70R13.

Bias-ply and radial choices can change the car's visual character and how the setup feels on the road. Matching the tire to the wheel width and checking clearance matters before making the switch, particularly on an older vehicle that may have had wheel, suspension, or alignment changes over time.

Start with the fitment direction: 520-13 if you want the vintage numeric bias-ply size, or 145R13 if you want a radial already associated with the car. From there, compare the wheel setup, intended use, and whether appearance or radial construction is the higher priority.

Product differences also matter. In this fitment range, choices vary by brand, tire series, sidewall style, rim-width specification, and load figures where they are stated. A collector car aimed at period style may point one way, while a regularly driven Standard Eight may lead you toward a different construction and sidewall treatment.

The 1956 Standard Eight has sidewall choices that include blackwall, narrow whitewall, and wide whitewall, depending on the size and product line you choose. Blackwall options appear in both the radial 145R13 selection and some 520-13 bias-ply choices, while whitewall treatments are available within 520-13 bias-ply tires.

Sidewall style changes the look of the car more quickly than almost any other tire detail. A blackwall setup gives a simpler presentation, while narrow or wide whitewalls create a stronger vintage appearance. It is worth deciding on the visual direction first, then narrowing the search to the correct size and construction.

Tires for the 1956 Standard Eight are available from Michelin, Firestone, and Premium Sport. Michelin appears in the 145R13 radial category, Firestone covers both 145R13 radial and 520-13 bias-ply applications, and Premium Sport is represented in 520-13 bias-ply whitewall options.

Brand alone is not the only comparison point. It makes more sense to look at how each brand's offerings line up with the size you need, whether the tire is radial or bias-ply, the sidewall treatment you want, and whether the wheel on the car matches the tire's stated rim-width requirements.

For a period-style 1956 Standard Eight, the 520-13 bias-ply size is the natural starting point because it preserves the vintage numeric sizing format and the traditional construction associated with an older small car. That size is also where the broadest appearance range shows up, including blackwall, narrow whitewall, and wide whitewall choices.

The right visual result depends on how the car is being restored and what era-specific look you want to emphasize. If exact originality matters beyond general period style, marque-specific references and restoration documentation are worth checking before selecting a brand or whitewall treatment for the finished car.

Tire construction changes more than ride character on a restored 1956 Standard Eight; it also changes the overall presentation. A 520-13 bias-ply tire keeps the older size format and a more traditional look, while a 145R13 radial introduces a later-style metric designation even when the tire remains visually restrained in blackwall form.

That difference matters on a small 1950s car because the tire is a visible part of the finished stance and character. Owners aiming for a restoration-oriented appearance often start by deciding whether the car should look firmly of its era or simply use a size and construction that support easier modern road use.

Yes, modifications can affect tire fitment on a 1956 Standard Eight even when the correct size family is being considered. Aftermarket wheels, different wheel widths, suspension changes, ride-height changes, and body or brake alterations can all change how a 520-13, 145R13, or a radial equivalent sits on the car.

A modified car should be checked at the wheel and on the vehicle, not just by reading the sidewall size. Steering travel, inner clearance, outer fender clearance, and the actual width of the rim all deserve attention before finalizing a tire choice, especially when moving away from the original bias-ply format.

Before driving a 1956 Standard Eight on new tires, inspect the wheels, valve stems, lug hardware, and general clearance at full steering travel. It also makes sense to confirm that the tire size, construction, and wheel dimensions are working together properly so the new tires are not being asked to compensate for a mismatch elsewhere.

The rest of the road-use check should include inflation pressure, signs of rubbing, and a look at the suspension and steering components on a car of this age. A short initial drive followed by a second inspection can reveal contact marks, uneven seating, or other issues that are easier to correct early.

Tires on a collector 1956 Standard Eight should be kept clean, properly inflated, and inspected regularly for cracking, bulges, cuts, uneven wear, and slow air loss. Because collector cars often spend long periods parked, visual condition can deteriorate before significant tread wear ever appears.

Storage conditions matter just as much as mileage. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tire over time, and occasional checks of the contact patch and sidewalls are worthwhile. A low-use car still benefits from routine inspection before each meaningful road outing.