1956 Mercedes-Benz 180 Tires

The 1956 Mercedes-Benz 180 uses two primary tire sizes: 640-13 and 700-13. Both are bias-ply sizes intended for 13-inch rims, and the covered Base & D configuration is associated with both of them rather than just one fixed size.

That makes size confirmation the most important first step before ordering tires. Check the tires currently on the car, confirm the wheel diameter, and make sure the wheel width and overall vehicle setup match the size being considered. Once the correct primary size is established, the next decision is whether to stay with a period-style bias-ply tire or compare one of the available radial equivalents.

The primary tire fitments for a 1956 Mercedes-Benz 180 use a 13-inch rim diameter. Both 640-13 and 700-13 are 13-inch tire sizes, so rim diameter remains consistent even though the car is associated with two different section-width fitments.

Rim diameter alone does not settle the fitment question, because wheel width still matters when choosing between the two sizes or when comparing radial-equivalent options. A car that has been changed over the years may no longer have its original wheel setup, so measuring the wheel and checking the current tire size helps prevent selecting a tire that looks or fits differently than expected.

On a 1956 Mercedes-Benz 180, 640-13 is a numeric bias-ply tire size. The 640 refers to a nominal section width of about 6.40 inches, and the 13 identifies the rim diameter in inches.

This older sizing format does not read the same way as a modern metric radial size, so it helps to interpret it before comparing alternatives. Once the size is understood, the practical choice becomes whether to keep the traditional bias-ply construction for period-style appearance and feel, or evaluate the available radial equivalents while still checking wheel width, clearance, and the car’s current setup.

For a 1956 Mercedes-Benz 180, 640-13 is a primary bias-ply tire size rather than a radial. It uses the older numeric bias-ply format that fits the car’s period and remains relevant for owners who want a traditional construction and appearance.

That distinction matters because a radial equivalent and a primary bias-ply fitment are not the same thing, even when they are close in application. Owners keeping the original-era driving character often stay with bias-ply construction, while owners considering more modern road manners may compare radial alternatives carefully and confirm wheel width, overall dimensions, and clearance before making a change.

For 640-13, radial equivalents include 175R13 as an 80-series metric radial, P175/75R13 as a 75-series P-metric radial, P185/70R13 as a 70-series P-metric radial, and 650R13 as a bias-look radial. For 700-13, the available radial equivalents are 185R13, P185/75R13, and P205/70R13.

These sizes give a 1956 Mercedes-Benz 180 owner several ways to compare profile and sizing conventions without treating any one option as automatic interchangeability. The recommended rim-width range tied to these equivalents is 4 to 6 inches, so the wheel itself should be checked first. After that, compare the tire’s dimensions against available space at the fender, steering, and suspension points.

Start by confirming the car’s actual primary size, either 640-13 or 700-13, and matching any radial alternative to the correct 13-inch wheel setup. The recommended rim-width range for the available equivalents is 4 to 6 inches, which makes wheel-width verification part of the conversion decision.

A careful conversion also means checking the car’s current clearance at the fenders and steering components, especially if ride height, suspension parts, or wheels have been changed over time. Radial alternatives can be useful, but they should be treated as comparison choices rather than automatic substitutions. Matching the tire to the vehicle’s intended appearance and driving use is just as important as matching the numbers.

The first consideration is confirming whether the car should use 640-13 or 700-13, since both primary sizes are associated with the 1956 Mercedes-Benz 180. After that, focus on construction type, wheel dimensions, sidewall appearance, and whether the car is being kept in a period-style bias-ply setup or compared against radial equivalents.

Product differences matter once the size is settled. The available 640-13 and 700-13 choices vary by brand, tire series, rim-width specification, weight, and load capacity, while both use a wide whitewall presentation. A restoration-oriented car may prioritize visual character, while a regularly driven car may put more emphasis on how the chosen construction works with its wheel setup and intended use.

The available products for the 1956 Mercedes-Benz 180 use a wide whitewall sidewall style in both 640-13 and 700-13. That gives the car a distinctly traditional presentation that suits many postwar restoration and preservation projects.

Even with the same general sidewall style, tire choice still depends on getting the correct size and construction for the car. A wide whitewall can complement the Mercedes-Benz 180’s era, but appearance should not be the only factor. Confirm the wheel setup first, then compare the tire series and product specifications so the final choice supports both the look of the car and its planned road use.

The available tire choices for a 1956 Mercedes-Benz 180 come from BFGoodrich and Firestone. BFGoodrich appears in the 640-13 size through the Silvertown Classic Bias Ply line, while Firestone appears in 700-13 through the Firestone Classic Bias Ply series.

Brand alone should not drive the decision, because each offering is tied to a specific primary size and its own product details. Once the correct size has been confirmed on the car, compare the tire series, sidewall treatment, rim-width specification, load capacity, and construction. That approach keeps the selection grounded in fitment and intended appearance rather than in name recognition by itself.

A period-style 1956 Mercedes-Benz 180 usually starts with one of its primary bias-ply sizes, 640-13 or 700-13, on a 13-inch rim. Staying with the correct size family and bias-ply construction preserves the visual proportions and traditional character associated with the car’s mid-1950s presentation.

The exact choice still depends on which size the car is set up to use, since both are associated with this model. Available products also differ by series and load specification, even though both current options use a wide whitewall look. Owners chasing exact originality should compare the tire choice against marque references or restoration records rather than assuming any single modern product is automatically exact.

Tire construction changes more than ride behavior on a restored 1956 Mercedes-Benz 180; it also influences the car’s overall visual impression. A bias-ply tire in 640-13 or 700-13 maintains the traditional construction associated with the model’s era, while a radial equivalent introduces a more modern tire format.

That difference can matter even before the car moves, especially on a restoration where stance and sidewall presentation are part of the finished look. A bias-look radial can soften that visual shift for owners considering radial construction in the 640-13 range. The best choice depends on whether the project leans more toward historical appearance, regular driving, or a balance of both.

Yes, modifications can affect tire fitment on a 1956 Mercedes-Benz 180, even though the primary sizes remain 640-13 and 700-13 on 13-inch rims. Changes to wheel width, wheel offset, suspension height, or body clearance can alter how either tire size sits and moves within the wheel opening.

That matters even more when comparing a radial equivalent, because the tire may differ in shape from a traditional bias-ply. A car with aftermarket wheels or suspension changes should be measured rather than assumed to match stock conditions. Checking steering travel, fender space, and the relationship between tire and wheel helps avoid surprises once the car is back on the road.

Before driving a 1956 Mercedes-Benz 180 on new tires, inspect the wheels for the correct 13-inch diameter, confirm that the selected tire size matches the car’s actual setup, and make sure the tires are inflated appropriately for their use. It also helps to look closely at valve stems, wheel condition, and general mounting quality.

A short test drive should be preceded by a simple clearance check at full steering lock and a visual check around the fenders and suspension. On a collector car, road readiness also depends on the rest of the chassis, so worn steering or suspension parts can affect how a newly installed tire behaves. Rechecking pressure and wheel fasteners after initial use is a sensible final step.

Collector-car tires on a 1956 Mercedes-Benz 180 should be maintained with regular pressure checks, routine visual inspections, and close attention to age-related deterioration. Whether the car uses 640-13 or 700-13, look for cracking, bulges, cuts, uneven wear, and any sign of air loss before normal driving or longer storage intervals.

Storage conditions matter because low-use cars often age their tires long before they wear them out. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps protect the sidewalls and overall tire condition. It also pays to move or drive the car periodically so one spot is not carrying the load for extended periods on the same section of tire.