Auburn 90 Series Tires

The Auburn 90 Series uses two listed tire sizes for 1929: 30X6.00 and 6.00-18. Those sizes are not simply alternate spellings of the same thing. They represent two different sizing systems, with 30X6.00 using an older diameter-by-section convention and 6.00-18 using a numeric bias-ply convention with an 18-inch rim diameter stated directly in the size.

That means an Auburn 90 Series owner should identify the actual wheel and tire setup on the car before choosing a replacement. A restored car may still carry its original style of wheel, or it may have been changed during an earlier rebuild. The year alone is not enough here, because both sizes appear within the same 1929 model range.

On an Auburn 90 Series, 30X6.00 is an antique diameter-by-section size. The 30 refers to the tire's approximate outside diameter in inches, and the 6.00 refers to nominal section width. It does not tell you the wheel diameter, which is why modern buyers often mistake this style of size code for a rim measurement when it is not.

That distinction matters because an Auburn 90 Series fitted for 30X6.00 should not be matched by guesswork to a later numeric size just because the widths appear similar. The safest approach is to inspect the wheel itself and compare the existing setup to original restoration records or marque references before deciding whether the car belongs on an antique-format tire.

A 1929 Auburn 90 Series can show two tire sizes because the model sits in a transition period where more than one sizing convention was in use. One listed size is 30X6.00, which follows an earlier diameter-by-section pattern, while the other is 6.00-18, which follows a later numeric bias-ply pattern. That split points to a difference in wheel and tire specification rather than a simple duplicate entry.

For an owner, the practical takeaway is to identify the exact configuration on the car instead of relying only on the model name and year. Wheel changes are common over the life of collector cars, especially on cars restored decades ago. Check the wheel diameter, inspect any existing tire markings, and compare them with period references for your specific Auburn 90 Series.

The Auburn 90 Series uses an 18-inch rim when fitted with size 6.00-18. The antique-format size 30X6.00 does not include the rim diameter within the code, so the wheel size cannot be read from that tire marking alone. That is the key difference between the two listed Auburn 90 Series sizing systems.

If your Auburn 90 Series currently wears 6.00-18 tires, the rim diameter is plainly stated in the size. If it wears or is supposed to wear 30X6.00 tires, you need to verify the wheel separately before selecting a replacement. Measuring the rim and checking restoration paperwork will usually settle the question faster than trying to cross-reference by appearance alone.

The correct way to confirm tire size for a 1929 Auburn 90 Series is to start with the wheels actually fitted to the car and then compare that setup to the listed sizes of 30X6.00 and 6.00-18. Because those two sizes use different conventions, reading only the first number of an old tire can be misleading. A physical inspection of the wheels and any surviving tire markings is the right first step.

Once you know whether the car is set up for an antique diameter-by-section tire or an 18-inch numeric tire, the choice becomes much clearer. Owners pursuing a preservation or concours-style restoration should also compare their findings with period literature, old photos, or club guidance. That extra step helps distinguish an original-style setup from a later replacement made during the car's long service life.

No current brand listings are present here for Auburn 90 Series tires. The key selection work on this page is identifying whether your car belongs on 30X6.00 or 6.00-18, since the size system itself is the main fitment challenge for this model. Brand choice comes after the wheel and sizing question has been settled correctly.

That ordering of decisions matters on a late-1920s car like the Auburn 90 Series because a tire from the right brand but the wrong sizing convention still leaves you with an incorrect setup. Confirm the wheel specification, then compare available tires in the correct size for sidewall appearance, construction style, and how closely they suit the restoration level you want to achieve.

The Auburn 90 Series size listings point to two different sizing approaches rather than a long list of clearly defined tire series. The practical distinction is between the antique-format 30X6.00 size and the later-style 6.00-18 numeric bias-ply size. Each reflects a different stage in tire specification during the late 1920s, and they should be treated as separate fitment paths rather than interchangeable labels.

For a buyer, that means the first decision is not which tread family sounds most appealing, but which sizing system the car actually requires. Once that is settled, you can choose the tire style that best matches the car's intended use, whether that is judged restoration, touring, or occasional display driving. Getting the underlying size convention right protects both appearance and fit.

An Auburn 90 Series should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, and ozone sources that harden rubber. Clean floors, stable temperature, and moderate inflation help prevent flat-spotting and sidewall stress. On a collector car from the late 1920s, long periods of inactivity are often harder on the tires than careful seasonal use.

If the Auburn 90 Series will sit for extended periods, move it slightly from time to time or support the car in a way that reduces constant load on one contact patch. Owners who tour only occasionally should also check inflation before every outing. Good storage habits preserve appearance, reduce cracking risk, and help an older-style tire age more evenly.

Tires on an Auburn 90 Series should be inspected before each drive and more thoroughly at regular intervals even if the car sees very little mileage. Look for cracking, tread separation, impact damage, uneven wear, bead issues, and any signs that the tire has shifted on the rim. A pre-war car can place unusual demands on tires because steering, suspension, and brake systems are very different from modern vehicles.

A more detailed inspection at least once or twice a year is a sensible routine for a lightly used Auburn 90 Series. That inspection should include the spare, valve hardware, and the condition of the wheels themselves, especially on a car with older restorations. Specialist inspection is wise whenever a tire shows sidewall checking, vibration, or changes in shape after storage.

Auburn 90 Series tires should be replaced when age, cracking, hardening, casing distortion, or other structural changes appear, even if the tread still looks deep. Collector tires often age out long before they wear out. That is especially true on pre-war cars, where low annual mileage can hide the fact that the rubber and internal structure have been deteriorating for years.

Owners should think in terms of condition and age, not just tread depth, when judging an Auburn 90 Series tire. Any tire with uncertain history deserves close review before road use, and an older restoration should not be trusted simply because it has spent most of its life indoors. Replacing aged tires before visible failure is one of the simplest ways to protect the car and everyone around it.

The Auburn 90 Series has two listed sizes for 1929: 30X6.00 and 6.00-18. Those entries show that more than one period-appropriate sizing approach is associated with the model year. Without narrowing the specific car's wheel setup, body style history, and restoration path, it is better to treat both as relevant Auburn 90 Series fitments rather than assume a single universal original specification.

For a restoration, the most accurate way forward is to compare the car's current wheels and surviving evidence with factory literature, period photographs, and marque-club guidance. Cars from this era were often altered in service, and later restorations sometimes introduced more available tire sizes. Correcting that detail can make a noticeable difference in stance, authenticity, and judging confidence.

Correct tire fitment can affect both the judged presentation and the perceived value of an Auburn 90 Series because tire size strongly influences stance, wheel appearance, and overall period correctness. On a late-1920s luxury and performance car, the difference between an antique-format fitment and a later numeric fitment is not minor cosmetic trivia. It can change how authentic the car looks at a glance.

Owners preparing an Auburn 90 Series for concours display or a high-level restoration should treat tire selection as part of the car's historical specification, not as an afterthought. Marque clubs, judging manuals, and period images are often the best references for settling close questions. Even on a driver, the right tire helps the car sit and present the way its era intended.

A correct sidewall style for an Auburn 90 Series depends on the exact restoration goal and the period appearance being pursued. Late-1920s cars can be seen with more than one traditional presentation, and sidewall treatment is part of the visual character of the finished car. The main point is that sidewall style should complement the proper size and wheel specification rather than be chosen in isolation.

When restoring an Auburn 90 Series, study period photographs of comparable cars and compare them to the trim, paint, and overall formality of your specific example. Owners aiming for judged authenticity should align sidewall appearance with recognized marque standards wherever possible. A dramatic sidewall choice on the wrong size can look less correct than a conservative sidewall on the proper wheel and tire setup.

A correctly fitted, sound tire can make an Auburn 90 Series suitable for careful public-road use, but safety depends on much more than tread depth alone. The tire must match the wheel setup, be in good structural condition, and work within the limits of a pre-war chassis, brakes, and steering system. A late-1920s car should always be driven with its age and mechanical design in mind.

Public-road use in an Auburn 90 Series calls for conservative speeds, longer stopping distances, and close attention to surface conditions. Before any regular driving, owners should make sure the entire running gear has been inspected, not just the tires. A beautiful old car can still be hazardous if the wheel, tire, and mechanical package are not all working together properly.

Before driving an Auburn 90 Series, check inflation, visible cracking, sidewall condition, tread security, valve condition, and whether the tires match the wheels fitted to the car. Also inspect the spare, because a long-distance outing in a collector car often depends on what is mounted out of sight. On a pre-war car, wheel hardware and brake condition deserve the same level of attention as the tires themselves.

A short walk-around before every drive can prevent the kind of preventable issue that becomes serious once the car is moving. If the Auburn 90 Series has been stored for weeks or months, add a slow initial test drive to feel for pull, vibration, or flat-spotting before committing to traffic. Small warnings on an older car rarely improve by being ignored.

Appropriate speed for an Auburn 90 Series on original-style tires is a matter of mechanical sympathy rather than simply what the engine can do. Even when correctly fitted, period-style tires belong to a pre-war driving environment and should be treated with restraint. Smooth operation at moderate speed is far more appropriate than sustained high-speed running on a collector car of this age.

Owners should match speed to the condition of the tires, the age of the restoration, road surface, weather, and the overall state of the car. An Auburn 90 Series intended for tours can still be enjoyed fully without pushing modern traffic pace at every opportunity. Leaving margin for braking, steering response, and tire heat is part of driving an older automobile well.