1950 Mercedes-Benz 170 Tires

The 1950 Mercedes-Benz 170 uses more than one tire size, so the correct fitment depends on the exact sub-model. The 170 D, Da & Db and the 170 V, Va & Vb use 550-16 bias-ply tires on 16-inch rims. The 170 S & Sb uses 15-inch fitments, with both 640-15 bias-ply and 175R15 radial sizes appearing in that application.

That means tire selection starts with identifying whether the car is a D-series, V-series, or S-series 170, then confirming whether it has 15-inch or 16-inch wheels. Many collector cars have had wheel or tire changes over time, so it is worth checking the wheels currently on the car before choosing a replacement tire by size alone.

The 1950 Mercedes-Benz 170 appears with two rim diameters depending on the sub-model and tire size. The 550-16 fitment uses a 16-inch rim, while both 640-15 and 175R15 use a 15-inch rim. Rim diameter is one of the most important checks on this vehicle because the tire range is split between 15-inch and 16-inch applications.

A buyer should confirm the actual wheel diameter on the car before comparing bias-ply, radial, or sidewall options. The difference between 15-inch and 16-inch wheels is too significant to treat as interchangeable, and the 170's sub-model range makes that verification especially important before moving on to rim width, clearance, or appearance decisions.

No, the 1950 Mercedes-Benz 170 does not use one shared tire size across all sub-models. The 170 D, Da & Db and the 170 V, Va & Vb use 550-16 bias-ply tires, while the 170 S & Sb uses 15-inch fitments that include 640-15 bias-ply and 175R15 radial sizing. Sub-model identification matters before any tire choice is made.

That difference affects more than just the numbers on the sidewall. It changes wheel diameter, construction choice, and the range of period-style tire options you can consider. On a car that has been restored or modified over time, checking the sub-model badge alone is not enough; verify the wheels on the vehicle and match the tire to that setup.

640-15 is a bias-ply tire size for the 1950 Mercedes-Benz 170. It is part of the 15-inch fitment used on the 170 S & Sb and differs from the radial-size format used by 175R15. Buyers looking at 640-15 are staying within a traditional vintage numeric bias-ply construction rather than moving into a modern radial sizing convention.

That matters because a bias-ply tire affects both appearance and fitment planning. Product choices in 640-15 include blackwall, narrow whitewall, and wide whitewall options, so the decision is not just construction but also how the finished car should look. Wheel diameter should still be confirmed first, since 640-15 belongs only with the 15-inch setup.

Radial equivalents for 640-15 include 175R15 as an 80-series metric radial, P175/75R15 as a 75-series P-metric radial, and P185/70R15 as a 70-series P-metric radial. These are all 15-inch radial alternatives associated with the 640-15 bias-ply size. A recommended rim-width range of 5-6 inches applies to that equivalent group.

Each of those sizes follows a different sizing convention, so the choice is not simply one radial replacing one bias-ply tire automatically. The buyer should compare wheel width, wheel diameter, and available clearance before changing construction or profile. That check is especially important on restored cars where wheel selection, ride height, or suspension condition may differ from earlier setups.

The answer depends on the sub-model, the wheel setup, and what you want from the car. A 1950 Mercedes-Benz 170 may use traditional bias-ply sizes such as 550-16 or 640-15, while the 170 S & Sb also appears with a 175R15 radial fitment. Bias-ply choices support a more traditional visual presentation, while radial sizing may appeal to owners already working within a radial-based 15-inch setup.

A restoration-oriented car often starts with the primary fitment and then narrows the choice by sidewall style and brand. A road-driven car may lead the owner to evaluate radial equivalents, but that decision should come after confirming wheel dimensions and clearance. The right direction is the one that matches the car's actual configuration and the owner's priorities for use and appearance.

Start by confirming that the car is one of the 16-inch-wheel versions that uses 550-16. Once the size is confirmed, the main choices are bias-ply product line, sidewall style, and wheel compatibility. Available 550-16 options include blackwall and wide whitewall tires from Excelsior, Avon, BFGoodrich, and Firestone across several vintage-style series.

The practical decision is usually about how the finished car should look and how closely the tire should match the character of a period Mercedes sedan. It also helps to compare the wheel-width range where stated, especially on cars with replacement wheels. Keeping the correct 16-inch size established first prevents the appearance and construction choices from becoming a fitment mistake.

Sidewall choices for the 1950 Mercedes-Benz 170 include blackwall, wide whitewall, and narrow whitewall depending on the tire size. The 550-16 bias-ply fitment is available in blackwall and wide whitewall versions, while 640-15 expands the look further with blackwall, narrow whitewall, and wide whitewall options. Those sidewall treatments can change the car's visual character substantially.

A blackwall tire usually gives the car a more restrained touring appearance, while whitewall treatments create a more formal restoration-oriented presentation. The right choice depends on the exact sub-model, the era of the build, and the look you want at the curb. It is still important to choose the correct tire size first, then narrow the decision by sidewall style.

Tires for the 1950 Mercedes-Benz 170 are available from Excelsior, Avon, BFGoodrich, and Firestone within the applicable bias-ply sizes. Brand choice varies by tire size, with 550-16 and 640-15 each offering a mix of blackwall and whitewall products across different classic tire series. That gives buyers more than one way to approach a traditional replacement.

The best way to use that brand variety is to compare the details that actually affect your car: correct size, sidewall treatment, wheel compatibility where stated, and the overall look you want. Brand alone does not determine fitment. On a vehicle like the 170, selecting the right size and construction first is more important than starting with a favorite name.

A period-style approach starts with the primary tire size used by the exact sub-model and wheel diameter on the car. For the 1950 Mercedes-Benz 170, that may mean 550-16 bias-ply on 16-inch wheels or 640-15 bias-ply on certain 15-inch S models. Choosing within the correct primary size keeps the visual stance and vintage sizing language aligned with the car's era.

After size is settled, sidewall treatment becomes the key appearance decision. Blackwall, narrow whitewall, and wide whitewall options each create a different presentation, and the most historically suitable choice can depend on how the car is being restored. When exact originality matters, marque references and period documentation are the right final check before selecting a sidewall style.

Tire construction changes how a restored 1950 Mercedes-Benz 170 presents visually, even before the car moves. Bias-ply tires such as 550-16 and 640-15 preserve the traditional vintage sizing format associated with the car's era, while a radial size such as 175R15 gives the car a more modern tire-language appearance. The difference is subtle in numbers but noticeable in restoration planning.

That is why construction should be chosen with the car's overall goal in mind rather than as an isolated specification. A preservation-minded build may stay with the original-style bias-ply format, while a regularly driven car may lead the owner toward radial consideration on the appropriate 15-inch application. Either way, the sub-model and wheel diameter still set the boundaries for a correct starting point.

Yes, modifications can affect tire fitment on a 1950 Mercedes-Benz 170 even when the chosen tire matches one of the correct period sizes. Aftermarket wheels, replacement rims, altered ride height, suspension work, or body repairs can all change the space available around the tire. That matters even more here because the 170 range includes both 15-inch and 16-inch wheel applications.

The safest approach is to confirm actual wheel diameter and width on the car before selecting tires, then check steering and fender clearance once the tire choice is narrowed down. Cars restored over many decades do not always retain their original wheel setup. A quick verification prevents confusion between a proper catalog size and a wheel package that has changed over time.

Before driving a 1950 Mercedes-Benz 170 on new tires, inspect the wheels for correct diameter and general condition, verify that each tire is properly seated, and check inflation pressure carefully. It is also wise to look over the suspension and steering components for wear that could affect how the car tracks. A collector car that has sat for long periods deserves extra attention before returning to regular road use.

After installation, turn the steering from lock to lock and look for any contact near the fenders or suspension. Then recheck pressure and lug security after the first short drive. These steps are useful on any vintage car, but they matter especially on a model range like the 170 where different sub-models and wheel diameters can make assumptions about fitment risky.

Tires on a collector 1950 Mercedes-Benz 170 should be maintained with regular pressure checks, visual inspections, and attention to age-related condition. Look for sidewall cracking, tread separation, bulges, cuts, and signs of air loss even if the car is driven only occasionally. Low annual mileage does not stop tires from aging, especially on a vehicle that spends long periods parked indoors or in storage.

Storage conditions matter almost as much as mileage. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone-producing equipment helps preserve the tires over time. It also helps to move the car periodically and inspect for flat-spotting or uneven wear. Vintage Mercedes sedans reward careful maintenance, and the tires deserve the same attention as the mechanical systems.