The 1968 Mercedes-Benz 600 came from an era when Mercedes-Benz built its flagship sedan and limousine around engineering depth, imposing road presence, and exceptional ride isolation. Owners today usually approach this car with the same mindset: preserving the dignity and character that make a 600 feel unlike an ordinary luxury car. Tire fitment centers on a 900-15 bias-ply tire on a 15-inch rim, which keeps the car in its proper vintage sizing language. Within that size, the real choices are sidewall presentation, period-style bias-ply appearance, or evaluating modern radial equivalents. The right decision depends on how the car is driven, how original-looking it needs to remain, and whether the wheel setup is still stock.
Which Tire Size Is Right for The 1968 Mercedes-Benz 600
The 1968 Mercedes-Benz 600 uses one primary tire size: 900-15, a bias-ply fitment for a 15-inch rim. That same size is used across the covered Base & P configuration, so the main decision is not which primary size fits, but which 900-15 tire best matches the car’s intended appearance, use, and whether a radial equivalent is worth considering.
A 900-15 is a vintage numeric bias-ply size in which the leading number refers to a nominal section width of about 9.00 inches, while the final number identifies a 15-inch rim. On a 1968 Mercedes-Benz 600, this sizing format supports the original-era look and construction style associated with large luxury cars of the period. Available 900-15 choices include BFGoodrich options in the Silvertown Classic Bias Ply series with narrow whitewall, dual-white-stripe, and triple-white-stripe presentations, along with an M&H Racemaster blackwall drag-race application. Choosing within this size comes down to intended use, sidewall appearance, and making sure the tire matches the wheel and vehicle setup.
Fitment is straightforward for the covered 1968 Mercedes-Benz 600 sub-models because they share the same primary tire size. Checking the exact sub-model still matters so the tire choice stays aligned with the car’s presentation, intended use, and wheel configuration.
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1968 Mercedes-Benz 600 Base & P
The 1968 Mercedes-Benz 600 Base & P uses the same 900-15 bias-ply fitment, so there is no separate primary size decision within this covered configuration. Tire selection is mainly about choosing the right sidewall style, keeping a restoration-oriented bias-ply look, or comparing radial-equivalent alternatives carefully before changing construction.
Bias-Ply to Radial Tire Conversion for the 1968 Mercedes-Benz 600
The original 900-15 tire size has four radial-equivalent options to consider. Those include 235R15 as an 80-series metric radial, P235/75R15 as a P-metric 75-series radial, P255/70R15 as a P-metric 70-series radial, and 820R15 as a bias-look radial equivalent. Together, these options span traditional metric radial sizing, lower-profile P-metric alternatives, and a radial designed to retain a more vintage presentation. A 6-8 inch rim-width range is associated with these equivalents, and wheel size, wheel width, and vehicle clearance should all be checked before changing from the original 900-15 format.
Modern Radial Equivalents
235R15
Equivalent 80-series Metric Radial (900-15)
P235/75R15
Equivalent P-metric 75-series Radial (900-15)
P255/70R15
Equivalent P-metric 70-series Radial (900-15)
820R15
Bias-look Radial Equivalent (900-15)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (6-8 in) and load needs match your vehicle specifications.
Check fender clearance, steering clearance, and stance before installation.
Consider suspension condition and intended road use when choosing equivalents.
Important Fitment Notes
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1968 Mercedes-Benz 600 Tires for Sale
Available 900-15 choices include BFGoodrich and M&H Racemaster bias-ply tires, with differences in tire series, intended use, and sidewall treatment. The most visible distinctions are blackwall, narrow whitewall, dual-white-stripe, and triple-white-stripe presentations.
Owners of a 1968 Mercedes-Benz 600 usually want clarity on the 900-15 fitment, 15-inch rim compatibility, bias-ply versus radial-equivalent choices, sidewall appearance, and what to inspect before putting a large collector car back on the road.
Tire Size & Fitment
What tire size fits a 1968 Mercedes-Benz 600?
The 1968 Mercedes-Benz 600 uses a 900-15 tire size. This is a numeric bias-ply fitment and it is the primary size associated with the covered 600 Base & P configuration, using a 15-inch rim.
That makes the main selection question less about finding multiple primary sizes and more about choosing the right 900-15 tire style for the car. Sidewall appearance, intended use, and whether the car still has its original wheel setup all matter before moving ahead with a purchase or considering a radial equivalent.
What size rim does a 1968 Mercedes-Benz 600 use?
The primary 900-15 tire fitment for a 1968 Mercedes-Benz 600 uses a 15-inch rim diameter. Product options in this size are also built around 15-inch rim compatibility, which keeps the basic wheel diameter question straightforward.
Rim diameter is only part of the fitment picture, especially on a heavy collector car. Wheel width should still be confirmed, and any car that has had wheel changes over the years deserves a closer look before mounting tires, particularly if the goal is to move from the original-style bias-ply construction to a radial alternative.
Does the 1968 Mercedes-Benz 600 Base & P use the same tire size?
Yes. The covered 1968 Mercedes-Benz 600 Base & P configuration uses the same 900-15 bias-ply tire size. There is no separate primary size split within that covered sub-model grouping.
That consistency simplifies fitment, but it does not eliminate the need to verify the actual wheel setup on the car. A restored or modified 600 may have different wheels than expected, and buyers still need to decide whether they want a period-style bias-ply presentation or a radial-equivalent approach for road use.
Bias-Ply & Radial Options
Is 900-15 a bias-ply or radial tire for the 1968 Mercedes-Benz 600?
For the 1968 Mercedes-Benz 600, 900-15 is the primary bias-ply tire size. That means the original fitment language for this car is rooted in a vintage numeric bias-ply format rather than a modern radial size designation.
Keeping a 900-15 bias-ply tire often makes sense for owners focused on traditional appearance and period-style construction. Buyers who are considering a radial alternative should treat that as a separate fitment decision and check wheel width, clearance, and the car’s actual condition before changing away from the original construction type.
What radial tire sizes are equivalent to 900-15?
Radial equivalents for 900-15 include 235R15, P235/75R15, P255/70R15, and 820R15. Those represent an 80-series metric radial, a P-metric 75-series radial, a P-metric 70-series radial, and a bias-look radial equivalent, respectively.
Each of those sizes gives the buyer a different way to compare modern radial construction to the original bias-ply fitment. The associated rim-width range is 6-8 inches, but dimensions, wheel compatibility, and body or steering clearance still need to be reviewed carefully before treating any equivalent as a usable alternative on the car.
Can I use a bias-look radial on a 1968 Mercedes-Benz 600?
A bias-look radial equivalent is available for the 1968 Mercedes-Benz 600 in size 820R15. It offers a radial-construction alternative that is intended to keep a more traditional visual character than a more modern-looking metric radial.
That makes it especially relevant for owners who want to preserve vintage presentation without staying strictly with bias-ply construction. Even so, the switch should be treated as a fitment change rather than an automatic substitute, with attention paid to wheel width, overall compatibility, and the space available around the suspension and body.
Choosing the Right Tire
What should I consider when choosing a 900-15 tire for a 1968 Mercedes-Benz 600?
Start with the basics: the 1968 Mercedes-Benz 600 uses a 900-15 tire on a 15-inch rim, so staying in the correct primary size is the first step. After that, the real choice is between a restoration-oriented bias-ply presentation and a carefully evaluated radial-equivalent path.
Within the available 900-15 options, sidewall style and intended use matter quite a bit. A whitewall or stripe treatment creates a very different visual result than a blackwall, and specialty applications such as a vintage drag slick serve a much narrower purpose than a road-oriented classic bias-ply tire.
What sidewall styles are available for 1968 Mercedes-Benz 600 tires?
Available 900-15 sidewall styles for the 1968 Mercedes-Benz 600 include Triple-White-Stripe, Narrow Whitewall, Dual-White-Stripe, and Blackwall. Those choices create distinctly different visual effects even though they share the same primary tire size.
For many 600 owners, sidewall style is one of the most important appearance decisions on the page. A whitewall or multi-stripe treatment supports a more formal vintage look, while a blackwall reads more understated or more specialized depending on the tire series, so the tire should match the car’s presentation and intended use.
What brands offer tires for the 1968 Mercedes-Benz 600?
The 900-15 fitment for a 1968 Mercedes-Benz 600 is available from BFGoodrich and M&H Racemaster. BFGoodrich appears in the Silvertown Classic Bias Ply series, while M&H Racemaster offers a Vintage Drag Slick in the same primary size.
That brand spread gives buyers two very different kinds of choices within 900-15. One group leans toward classic road-going bias-ply presentation with multiple sidewall treatments, while the other is a specialty drag-race application, so the intended use of the car should guide the decision as much as the size itself.
Restoration & Appearance
Which tire should I choose for a period-style 1968 Mercedes-Benz 600?
A period-style approach for a 1968 Mercedes-Benz 600 usually starts with the original-format 900-15 bias-ply size. That keeps the car in the vintage sizing and construction language associated with large luxury automobiles of the late 1960s.
From there, appearance becomes a matter of sidewall treatment and how formal or restrained the finished car should look. Owners pursuing exact historical authenticity should compare their choice against marque references, archival photos, or restoration records, since a correct size alone does not prove that one stripe or whitewall treatment is exact for every car.
How does tire construction affect the appearance of a restored 1968 Mercedes-Benz 600?
Tire construction changes more than ride feel on a restored 1968 Mercedes-Benz 600; it also changes visual character. A 900-15 bias-ply preserves the older construction style tied to the car’s original era, while radial alternatives introduce a more modern format even when they are chosen in equivalent sizing.
That difference matters because a flagship Mercedes of this period carries a very formal visual presence. Owners who want a traditional restored look often begin with bias-ply sizing and sidewall style first, then decide whether road-use priorities justify a radial-equivalent option that may present the car a little differently.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1968 Mercedes-Benz 600?
Yes. A 1968 Mercedes-Benz 600 may share one primary tire size on paper, but aftermarket wheels, suspension work, ride-height changes, or body alterations can change what actually clears the car. That matters even more when comparing the original 900-15 bias-ply size to a radial equivalent.
Any car with a long ownership history deserves a hands-on check before tires are chosen. Wheel diameter and width should be confirmed, and the owner should also look at steering clearance, fender space, and general suspension condition so the tire decision matches the car as it sits today rather than how it left the factory decades ago.
What should I inspect before driving a 1968 Mercedes-Benz 600 on new tires?
Before putting a 1968 Mercedes-Benz 600 back on the road, inspect the wheels for the correct diameter and condition, confirm that the tires are properly mounted, and check inflation carefully. It is also wise to look over suspension and steering components so the new tires are not being asked to compensate for unrelated mechanical issues.
A collector car that has spent time parked can hide problems that are easy to miss at first glance. Sidewall clearance, tread seating, valve condition, air loss, and signs of rubbing should all be reviewed during the first miles, especially on a large, heavy sedan where stable, predictable operation depends on the whole setup working together.
How should 900-15 tires on a collector 1968 Mercedes-Benz 600 be maintained?
Collector-car tires in 900-15 size should be kept properly inflated, inspected regularly for cuts, bulges, cracking, and uneven wear, and checked for air loss even when the car is driven only occasionally. Low annual mileage does not eliminate aging, so condition matters as much as tread depth on a seldom-used 1968 Mercedes-Benz 600.
Storage conditions make a real difference over time. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone-producing equipment helps protect the tires, and periodic visual inspections are worthwhile before every meaningful outing so the car is not relying on old or deteriorating rubber simply because it looks lightly used.