1958 Mercedes-Benz 300 Tires

A 1958 Mercedes-Benz 300 can use 760-15, 670-15, or 6.50-15, depending on the exact sub-model. All three are primary bias-ply tire sizes mounted on 15-inch rims, so the size question is tied directly to whether the car is a 300 D, 300 SL, or 300 SL Roadster.

That means the first step is identifying the exact model designation on the car before choosing a tire. Even though all three fitments share the same rim diameter, they are not the same size, and moving from one to another without checking wheel width, overall stance, and clearance can change how the car sits and presents.

The primary tire fitments for the 1958 Mercedes-Benz 300 family use a 15-inch rim diameter. That applies across the 760-15, 670-15, and 6.50-15 sizes, even though the section widths differ from one sub-model to another.

Rim diameter is only part of the fitment picture, so it helps to confirm wheel width as well before selecting a tire or considering a radial equivalent. A 15-inch wheel can still be wrong for the chosen tire if the wheel is too narrow, too wide, or has been replaced with an aftermarket setup that changes the tire’s working shape.

The 1958 Mercedes-Benz 300 name covers different sub-models, and they do not all use the same primary tire size. The 300 D uses 760-15, the 300 SL uses 670-15, and the 300 SL Roadster uses 6.50-15, with each one retaining a bias-ply construction and a 15-inch rim diameter.

That variation is exactly why a tire search for this car should begin with the sub-model rather than with the year and make alone. Once the correct configuration is confirmed, the process becomes much easier, because the buyer can focus on the right section width, sidewall style, and any radial-equivalent options that apply to that specific car.

On the 1958 Mercedes-Benz 300, 670-15 is a primary bias-ply tire size used on the 300 SL. In this fitment, the numeric size format belongs to the vintage bias-ply system, not to a modern radial sizing convention.

That matters because a buyer choosing 670-15 is usually deciding whether to keep the car on its original-style construction or evaluate one of the radial equivalents available for that size. The wheel setup should be checked carefully before any conversion, especially since radial alternatives can involve different sizing conventions and rim-width requirements.

For 760-15, radial equivalents include 215R15, P225/75R15, P235/70R15, and 760R15. For 670-15, radial equivalents include 195R15, P205/75R15, P215/70R15, and 670R15. The first option in each group is an 80-series metric radial, the second is a 75-series P-metric radial, the third is a 70-series P-metric radial, and the last is a bias-look radial.

Those options give the owner several ways to approach a radial conversion, from a conventional metric radial to a bias-look radial that keeps a more traditional visual character. The 760-15 equivalents call for a 6-8 inch rim-width range, while the 670-15 equivalents call for 5-7 inches, and both should be checked against wheel fit and vehicle clearance.

Start by matching the radial equivalent to the car’s actual primary size, because the 1958 Mercedes-Benz 300 does not use one universal fitment across all sub-models. The 760-15 and 670-15 sizes have defined radial equivalents, while the wheel diameter, wheel width, and the car’s exact setup still need to be confirmed before any change in construction.

A careful conversion check should include wheel width, tire-to-fender clearance, steering clearance, suspension condition, and whether the car still has its original wheel and ride-height configuration. Owners also need to keep appearance goals in mind, since a standard metric radial and a bias-look radial can create noticeably different visual results on a restored Mercedes-Benz.

The first consideration is selecting the correct primary size for the exact sub-model, since the 1958 Mercedes-Benz 300 family uses 760-15, 670-15, or 6.50-15 rather than one shared fitment. From there, the main choices are bias-ply construction, sidewall treatment, brand, and whether a radial equivalent is being considered for a size that supports one.

Appearance and intended use usually guide the final decision. A sedan with a formal restoration theme may call for a different whitewall presentation than a sports car with a more restrained look, while a regularly driven car may push the owner to compare radial alternatives, wheel dimensions, and the practical effect of any previous modifications.

Sidewall choices for 1958 Mercedes-Benz 300 tires include blackwall, narrow whitewall, and wide whitewall, depending on the tire size. The 760-15 offerings lean heavily toward whitewall presentations, while 670-15 opens the broadest range of sidewall treatments across several brands and tire series.

That gives the buyer room to shape the car’s visual character without changing the primary fitment. A wide whitewall creates a more formal period-style look, a narrow whitewall feels more restrained, and a blackwall can suit a more sporting presentation, but the best choice still starts with the correct size for the exact 300 sub-model.

Tire options for the 1958 Mercedes-Benz 300 include BFGoodrich, Coker Classic, Universal Vintage Tire, Goodyear, Firestone, US Royal, Excelsior, Avon, and STA, depending on the size. Brand availability is strongest in 670-15, while 760-15 still offers several recognizable period-style choices.

Brand should be compared alongside the tire series, sidewall style, and wheel fitment details rather than treated as the only decision point. One owner may be focused on a particular tread presentation or whitewall width, while another may be matching the tire more closely to the car’s role as a touring sedan or sports-car restoration.

A period-style 1958 Mercedes-Benz 300 should begin with the correct primary bias-ply size for the exact sub-model: 760-15 for the 300 D, 670-15 for the 300 SL, or 6.50-15 for the 300 SL Roadster. Staying with the proper bias-ply size preserves the most traditional starting point for the car’s stance and visual character.

After the size is confirmed, the appearance decision usually comes down to sidewall style and brand presentation. Buyers seeking exact historical accuracy should compare the car against marque-club guidance, photographs, and vehicle-specific restoration references, because a tire can be period-style in the right size without necessarily matching the car’s original delivery appearance.

Tire construction changes how a restored 1958 Mercedes-Benz 300 looks even when rim diameter stays the same. A bias-ply tire maintains the traditional construction used in the primary fitments, while a modern radial equivalent can alter the overall visual impression through its sizing convention and sidewall presentation.

That difference is especially important on collector cars where stance and sidewall style carry much of the period feel. Owners who want a more traditional appearance may prefer a bias-ply or a bias-look radial where available, while owners focused on road use may still compare radial alternatives carefully against wheel fit and the car’s finished look.

Yes, modifications can affect tire fitment on a 1958 Mercedes-Benz 300 even when the tire size itself appears correct. Changes such as aftermarket wheels, altered wheel width, suspension work, ride-height changes, or body modifications can all influence how a 760-15, 670-15, or 6.50-15 tire sits and clears.

A modified car should be checked at full steering lock and through normal suspension travel before settling on a replacement tire. That becomes even more important when considering a radial equivalent, because the tire may use a different sizing convention and may need closer attention to wheel compatibility and visible fender clearance.

Before driving a 1958 Mercedes-Benz 300 on new tires, inspect the wheels for correct diameter and condition, confirm proper inflation, and make sure the tires seat correctly on the rims. It also helps to look over suspension and steering components so the new tires are not being asked to compensate for worn or loose hardware.

A short initial road check can reveal rubbing, pulling, vibration, or uneven clearance that was not obvious in the garage. After that first drive, recheck pressure and look for any signs of contact at the fenders or suspension, especially on a car that has sat for long periods or has had wheel or chassis changes over time.

Tires on a collector 1958 Mercedes-Benz 300 should be inspected regularly for pressure loss, tread wear, sidewall cracking, bulges, cuts, and any signs of age-related deterioration. Collector cars often accumulate mileage slowly, so condition matters just as much as tread depth, particularly on bias-ply tires that may spend long periods parked.

Storage conditions make a real difference in long-term tire health. Keeping the car away from prolonged sunlight, moisture, excess heat, and ozone sources helps preserve the sidewalls, while periodic movement prevents long stationary periods from becoming part of the tire’s service story before the next meaningful drive.