1949 Mercedes-Benz Tire Fitment Guide

1949 Mercedes-Benz fitments in this guide center on the 170, which uses three sizes: 550-16, 175R15, and 640-15. The 550-16 fits 16-inch wheels, while both 175R15 and 640-15 fit 15-inch wheels. Where rim-width figures are available, 550-16 products are listed for 3.25 to 4.00-inch rims, and 640-15 products are listed for 4.00 to 5.00-inch rims depending on the specific tire.

That means the first step is identifying which wheel diameter is actually on your 1949 Mercedes-Benz 170. Once that is settled, the next question is whether you want a bias-ply tire that preserves a period presentation or a radial in the 15-inch fitment family. If your car has already been restored or updated, checking the wheel itself is more reliable than assuming every 170 used the same setup.

On a 1949 Mercedes-Benz, 550-16 is a traditional numeric bias-ply size. The 5.50 designation is the nominal section width in period sizing language, and the 16 identifies the wheel diameter in inches. It is a pre-metric format that belongs to the bias-ply era rather than the later radial sizing systems most modern drivers recognize.

For a buyer, 550-16 signals two important things at once: the tire is intended for a 16-inch wheel, and it sits firmly in the vintage bias-ply tradition. That makes it especially relevant when the goal is to preserve the original character of a 1949 Mercedes-Benz 170 fitted with 16-inch wheels. Sidewall treatment still varies within the size, so the final look depends on whether you prefer blackwall or wide whitewall styling.

On a 1949 Mercedes-Benz, 175R15 is a Euro-metric radial size. The 175 gives the section width in millimeters, the R identifies radial construction, and the 15 indicates a 15-inch wheel diameter. Because no aspect ratio is stated in the size itself, it follows the older Euro-metric convention rather than a modern slash-format metric size.

That makes 175R15 very different in character from a period numeric bias-ply size even though it still fits a classic wheel diameter. Owners of a 1949 Mercedes-Benz 170 with 15-inch wheels often look at this size when they want to stay within a classic-looking dimensional family while using radial construction. It is still important to verify wheel diameter first, because 175R15 and 550-16 are not interchangeable.

For a 1949 Mercedes-Benz 170 on 15-inch wheels, the choice between 640-15 and 175R15 is mainly a choice between bias-ply and radial construction. The 640-15 is the period-style numeric bias-ply option, while 175R15 is the radial alternative in the same wheel diameter class. The better choice depends less on the badge on the car than on how you want the car to present and drive.

Owners pursuing a historically faithful postwar look usually lean toward 640-15, especially when sidewall appearance is part of the restoration plan. Owners who expect more regular road use often consider 175R15 because radial construction brings a more modern tire format into the equation. The key is to confirm that your 1949 Mercedes-Benz actually has 15-inch wheels before comparing those two sizes, because neither replaces the 16-inch 550-16 fitment.

1949 Mercedes-Benz tires in these fitments are available in several sidewall presentations. The 550-16 size is offered in blackwall and wide whitewall versions, while 640-15 appears in wide whitewall and narrow whitewall forms. That gives the 170 owner room to tune the car’s visual character without changing the basic size family.

A more restrained blackwall look often suits buyers aiming for an understated European presentation, while whitewall widths can shift the car toward a more stylized period appearance. For judged restoration work, sidewall style matters alongside size and construction, so it is wise to match the visual treatment to the market, photos, and restoration intent for your specific 1949 Mercedes-Benz. Sidewall appearance is often the finishing touch that determines whether the car looks simply vintage or truly era-right.

Several brands cover 1949 Mercedes-Benz fitments in this range. The 550-16 size is offered by Excelsior, Avon, BFGoodrich, and Firestone, while 640-15 is available from BFGoodrich and Firestone. Those offerings are all in bias-ply construction within the listed products for those sizes.

Brand choice usually comes down to the combination of sidewall style, sizing preference, and the look you want on the car rather than a universal brand rule for every 1949 Mercedes-Benz 170. Some owners prioritize a traditional American-brand whitewall presentation, while others prefer the more understated look available in blackwall form. Once the correct wheel diameter is confirmed, narrowing by brand becomes much easier because you are comparing products within the right size family.

Rim-width guidance for 1949 Mercedes-Benz tires varies by size and sometimes by product within the same size. In 550-16, listed products fit 3.25 to 4.00-inch rims. In 640-15, some products fit 4.00 to 4.50-inch rims while others fit 4.50 to 5.00-inch rims, so the exact tire choice matters as much as the nominal size.

That is why measuring the actual wheel is worthwhile before settling on a tire for a 1949 Mercedes-Benz 170. Two tires with the same size code can still have different approved rim-width ranges, especially in vintage applications where sidewall shape and profile matter to both appearance and fit. If the car has replacement wheels, confirm those dimensions first rather than assuming they match original practice.

The listed 1949 Mercedes-Benz products do not carry TT or TL markings in the size lines shown here, so the final tube requirement should be confirmed against the specific tire and the wheel being used. That matters most on a postwar car like the 170 because tube use can depend on both tire construction details and whether the wheel was designed for tube-type service.

A practical approach is to treat the wheel and tire as a matched system rather than focusing on the tire size alone. If your 1949 Mercedes-Benz still uses original-style wheels, tube fitment may be part of keeping the assembly appropriate and dependable. Check the actual product marking and wheel condition before final assembly, especially if the car has sat for long periods or has undergone previous restoration work.

A stored 1949 Mercedes-Benz should be kept out of direct sunlight, away from electric motors or ozone-producing equipment, and off damp surfaces whenever possible. Clean, dry storage helps protect both rubber and wheels, and inflation pressure should be checked before the car is parked for an extended period. Bias-ply tires in particular can develop temporary flat-spotting more readily during long static storage than radials.

Moving the car periodically or placing it on stands for very long storage intervals can help reduce stress on the tires. If your 1949 Mercedes-Benz 170 wears a bias-ply fitment such as 550-16 or 640-15, expect the tire to be more sensitive to sitting than a radial-equipped car. Good storage habits are often the difference between a collector tire that stays presentable for years and one that ages prematurely in the garage.

Tires on a 1949 Mercedes-Benz should be judged more by age and condition than by mileage. A collector-car tire should be evaluated closely once it reaches roughly five to seven years of service, and around ten years is the point where replacement deserves serious consideration even if tread depth still looks usable. The DOT date code, when present on the tire, helps establish age more accurately than ownership memory.

That guideline matters because a lightly driven 1949 Mercedes-Benz 170 can still spend years exposed to heat cycles, garage ozone, and static loading. A tire that looks fine from ten feet away may still have hardened rubber or early cracking that changes how the car feels on the road. Periodic age review is especially important if the car only comes out for shows, tours, or occasional weekend driving.

Tires on a 1949 Mercedes-Benz should be inspected before every drive and again before any longer outing. Look for sidewall cracking, uneven wear, tread separation signs, cuts, bulges, and pressure loss, and inspect valve stems at the same time. If the wheel and tire setup uses tubes, tube-related air loss and stem condition deserve extra attention because those issues may appear before visible tread problems do.

A short local trip can hide problems that become obvious only after heat builds at road speed, so a pre-drive walkaround is never wasted time on a 1949 Mercedes-Benz 170. Regular inspection also helps you catch mismatched aging across a full set, including the spare. On older cars, tire condition is one of the easiest safety checks to perform and one of the most important to keep consistent.

A 1949 Mercedes-Benz 170 would have been a bias-ply car when new, because radial adoption was still in its early stages and bias-ply construction remained standard across much of the market. Within the fitments covered here, both 550-16 and 640-15 are period-style numeric bias-ply sizes, while 175R15 represents a later radial-style alternative within the 15-inch wheel family. Original-market details can still vary by wheel equipment and regional specification.

For restoration work, that means a bias-ply size is usually the starting point when originality is the goal on a 1949 Mercedes-Benz. The next step is confirming whether your particular 170 should be on a 15-inch or 16-inch wheel, then choosing the sidewall treatment that best matches period photos and restoration intent. Marque clubs and model specialists remain the best sources for market-specific confirmation when show-level accuracy matters.

Correct tire fitment matters on a shown 1949 Mercedes-Benz because judges and knowledgeable enthusiasts notice size, construction type, and sidewall presentation. A numeric bias-ply tire generally aligns more closely with period practice for a postwar 170 than a radial, and an obviously modern-looking sidewall can change the car’s visual authenticity even when the wheel diameter is correct.

That does not mean every event judges tires the same way, but it does mean your 1949 Mercedes-Benz should wear a size and look that support the restoration story you are presenting. A blackwall, narrow whitewall, or wide whitewall can each shift the impression of the car, especially in close judging. If you are building for concours use, confirm event standards early so the tire choice supports the rest of the restoration rather than working against it.

On the 1949 Mercedes-Benz 170, BFGoodrich and Firestone both cover the 640-15 size in bias-ply form, but they differ in sidewall treatment and approved rim-width range. BFGoodrich is listed with a 3.00-inch wide whitewall and a 4.00 to 4.50-inch rim-width range, while Firestone appears in 2.75-inch, 2.125-inch, and 1.00-inch whitewall versions with 4.50 to 5.00-inch rim-width ranges. Listed load figures also vary, with several at 1190 lbs at 32 psi and one Firestone version at 970 lbs at 32 psi.

That makes the choice more nuanced than simply picking a brand name for a 1949 Mercedes-Benz. The wheel on the car has to fall within the approved range for the exact tire you want, and the whitewall width strongly affects the final look. If your goal is a particular visual stance or a specific wheel fit, compare the individual 640-15 options closely before deciding.

A properly selected and properly maintained tire can make a 1949 Mercedes-Benz suitable for normal road use, but highway confidence depends on matching the tire to the wheel, the car’s condition, and the way the car will be driven. The listed 550-16 Avon product carries an 80L designation, and the L speed symbol corresponds to a 75 mph ceiling. The other listed products here do not show speed symbols in the visible size lines, so the exact rating should be checked on the individual tire before sustained higher-speed use.

On a car of this age, the tire is only one part of the equation. Brakes, steering play, suspension condition, wheel trueness, and alignment often have as much effect on real-world safety as the tread itself. A 1949 Mercedes-Benz 170 in sound mechanical condition can be enjoyable on modern roads, but the tire should be treated as part of a complete roadworthiness check rather than the only deciding factor.

Inflation pressure on a 1949 Mercedes-Benz should follow the vehicle’s factory recommendation first, then be checked against the tire maker’s rated limits for the exact product. Among the listed products, 550-16 and 640-15 examples show load figures at 32 psi, including 840 lbs at 32 psi, 970 lbs at 32 psi, and 1190 lbs at 32 psi depending on size and tire. Those figures describe tire capacity at a stated pressure, not a universal pressure setting for every 1949 Mercedes-Benz fitment.

That distinction matters because one size should never inherit the pressure guideline from another. The correct approach is to identify the exact tire on the car, verify the wheel diameter and product specification, and then compare that information with the period Mercedes-Benz recommendation for the 170. Pressure that is too low or too high can change handling, wear, and ride quality long before it creates an obvious visual problem.

Before a longer outing in a 1949 Mercedes-Benz, inspect every tire for cracking, cuts, bulges, embedded debris, uneven wear, and proper inflation. Check valve stems, confirm the spare is usable, and make sure the wheel hardware is secure. On a collector car, it is also wise to look for signs of age hardening or flat-spotting if the car has spent long periods parked.

That tire check should be part of a broader pre-drive routine that includes brakes, steering, fluids, and lights, because a 1949 Mercedes-Benz 170 asks more of its owner than a modern daily driver. A car that feels fine around town may reveal weaknesses only after miles accumulate and temperatures rise. Spending a few extra minutes in the garage usually does more for a successful tour than any roadside fix ever will.