Auburn 120 Series Tires

Auburn 120 Series tire fitments in this year group include two sizes for 1929: 30X6.50 and 650-18. The 650-18 size uses an 18-inch rim and is supported by listed Firestone Balloon bias-ply products sized for 3.25 to 3.50 inch rim widths. The 30X6.50 size is an antique-style notation where the wheel diameter is not stated in the size code itself.

That means the correct choice depends on the actual wheel equipment on the specific Auburn 120 Series, not just the model year. Start by reading the tire size on any existing tire, then verify the wheel diameter directly on the rim before selecting a replacement. On cars that have been restored or reconfigured over time, that check matters more than assuming every 1929 Auburn 120 Series used the same wheel and tire setup.

On an Auburn 120 Series, 30X6.50 is an antique diameter-by-section size. The first number, 30, refers to the tire's approximate overall outside diameter in inches, while 6.50 refers to section width in inches. Unlike a modern or later numeric code, this size does not tell you the wheel diameter.

That distinction is important because many buyers naturally read the first number as if it were the rim size, and on this format it is not. A 30X6.50 Auburn 120 Series tire should only be chosen after the wheel itself has been measured or verified against reliable vehicle records. If your car currently wears 18-inch balloon tires, it should not automatically be assumed to use the antique-format size.

Auburn 120 Series fitment here includes an 18-inch rim with the 650-18 size, plus a separate 30X6.50 size whose rim diameter is not expressed in the tire code. That means the model does not point to one single wheel diameter by name alone. The wheel diameter must be matched to the specific size format on the car.

For a car wearing 650-18 tires, the wheel should be an 18-inch rim. For a car using 30X6.50 notation, the correct wheel diameter needs to be confirmed independently because antique size codes center on tire diameter and section width instead. When working with a pre-war Auburn 120 Series, that is one of the most important checks to make before choosing any replacement tire.

The currently listed Auburn 120 Series products in 650-18 are bias-ply balloon tires, and a tube is required for that fitment. The 30X6.50 size is also an early-style non-radial format and belongs to the same general tube-type era of construction. On a 1929 Auburn 120 Series, inner tubes are part of the normal fitment approach rather than an unusual add-on.

Tube selection should match both the tire size and the wheel condition, especially on older rims that may have seen restoration, repainting, or long periods of storage. It is also wise to inspect the rim band and valve stem area whenever tires are being replaced. On a collector car like the Auburn 120 Series, tube condition can matter just as much as tread condition for reliable service.

A 1929 Auburn 120 Series can show either 30X6.50 or 650-18, so the right choice starts with the wheel and the existing fitment rather than the year alone. A 650-18 tire is for an 18-inch rim, while 30X6.50 is an antique diameter-by-section code that requires separate wheel verification. The two sizes should not be treated as interchangeable without checking the actual hardware on the car.

Begin with the tire size currently fitted if it is known to be correct, then confirm the wheel diameter directly on the rim. After that, compare sidewall preference and visual goals, since the available 650-18 products include both blackwall and wide whitewall versions. For a restored Auburn 120 Series, original vehicle records or marque expertise can help settle the question if the car's equipment has changed over the years.

For Auburn 120 Series tires in the available 650-18 fitment, the listed sidewall styles are blackwall and wide whitewall. Both are Firestone Balloon bias-ply products on 18-inch rims. That gives owners a choice between a more restrained appearance and a brighter period look without changing the tire size itself.

The right sidewall style depends on how the Auburn 120 Series is being presented. A blackwall often suits a more understated pre-war appearance, while a wide whitewall creates a stronger visual statement that many owners prefer on restored cars. Since sidewall style does not replace fitment verification, confirm the size and wheel first, then choose the appearance that best matches the car's restoration goals.

The currently listed Auburn 120 Series tire products are from Firestone. Both available products in 650-18 belong to the Firestone Balloon series, with one in blackwall form and one in a 3.50 inch wide whitewall style. That means brand choice is narrow in the available product group even though visual presentation differs within that brand.

For the buyer, that makes fitment and construction the first decision, with sidewall appearance following after that. If your Auburn 120 Series uses 18-inch balloon tires, the available Firestone options provide a period-appropriate bias-ply look in more than one sidewall treatment. If your car instead uses the 30X6.50 fitment, focus first on verifying that separate size before comparing brand expectations.

An Auburn 120 Series should be stored clean, dry, and out of direct sunlight, with the tires kept away from electric motors, ozone sources, solvents, and large temperature swings. Tire pressures should be checked before storage and again when the car is brought back into service. On a pre-war car with bias-ply tires, long stationary periods can encourage flat spotting and stress aging components that are already decades old in design.

If the Auburn 120 Series will sit for extended stretches, rolling it periodically or reducing load on the tires can help preserve casing shape. The car should also be parked on a clean, hard surface rather than bare dirt or damp concrete. Good storage habits matter because collector tires often age out long before they wear out, especially on vehicles that are driven only occasionally.

Tires on an Auburn 120 Series should be inspected before each drive and more thoroughly at regular service intervals even if mileage stays low. A visual inspection should look for cracking, cuts, weathering, uneven wear, valve stem deterioration, and any change in the way the tire sits on the rim. On a pre-war bias-ply application, those checks are especially important because small age-related issues can develop while the car is parked.

A hands-on inspection by a shop familiar with antique and collector vehicles is a good habit at least once a season. That inspection should include tube-related issues, bead seating, rim condition, and inflation consistency across the set. For an Auburn 120 Series that sees only event use, time-based inspection is often more important than mileage-based inspection.

Auburn 120 Series tires should be replaced when age, cracking, casing distortion, repeated air loss, impact damage, or prolonged storage exposure raise concern, even if the tread still looks usable. Collector-car tires often spend much of their life aging rather than wearing, so remaining tread depth by itself is not enough. Pre-war applications deserve a conservative approach because construction, use patterns, and storage histories vary widely.

Replacement decisions should be made with an eye toward the entire tire system, including tubes, valve stems, and rim condition. If a tire has been on the car for many years, or if its service history is unclear, a specialist inspection is worthwhile before any meaningful road use. On an Auburn 120 Series, preserving appearance matters, but age-related condition should always take priority over tread cosmetics.

Auburn 120 Series fitment in 1929 includes both 30X6.50 and 650-18, which shows that more than one tire specification belongs within this model group. The available current products for 650-18 are in the Firestone Balloon series, a period-style balloon bias-ply construction. That does not mean every Auburn 120 Series left the factory with the same brand or exact sidewall treatment.

For an owner pursuing originality, the key is to match the specific car's wheel equipment and surviving evidence before selecting a replacement. Factory literature, restoration photos, and marque club guidance are the best way to narrow down what was appropriate for a given Auburn 120 Series configuration. Once the correct size is established, sidewall style becomes part of the authenticity decision as well.

Correct tire fitment can absolutely affect how an Auburn 120 Series is judged, especially because size format, wheel diameter, and sidewall appearance all shape the car's visual correctness. A mismatch between an antique-format application and an 18-inch balloon-tire application can be obvious to knowledgeable judges and enthusiasts. Even when the difference seems small on paper, tire stance and profile strongly influence the finished look of a pre-war car.

For that reason, tire selection on an Auburn 120 Series should be treated as part of the restoration rather than as a generic maintenance item. Owners aiming for show presentation should compare their car to period references and marque standards before finalizing the size and sidewall style. On more driver-oriented restorations, correct fitment still matters because it supports both appearance and proper wheel compatibility.

Auburn 120 Series tires in the available 650-18 fitment are offered in both blackwall and wide whitewall form. Either can suit a pre-war restoration depending on the specific look being pursued and the way the individual car was equipped or restored. Sidewall style is separate from size, so the 18-inch wheel fitment still has to be confirmed first.

A blackwall tends to give an Auburn 120 Series a more restrained and utilitarian presentation, while a wide whitewall creates a more formal and visually prominent period appearance. The best choice depends on the restoration target, surviving photographs, and club guidance for the exact car. Once the proper size is established, sidewall style becomes one of the most visible finishing details on the vehicle.

A properly fitted Auburn 120 Series tire can be suitable for public-road use when the tire, tube, wheel, and chassis are all in sound condition and the car is driven within the limits of its era. That is especially true for the listed 650-18 bias-ply products, which belong to a period-style construction. Safe use depends on the complete condition of the car, not on the tire alone.

Before any regular driving, the Auburn 120 Series should have its wheels, brakes, steering, suspension, and tire pressures checked by someone comfortable with pre-war mechanical systems. Bias-ply tires also behave differently from modern radials, particularly in tracking and steering feel. A conservative pace and careful inspection routine are the right approach for a collector Auburn on today's roads.

Before driving an Auburn 120 Series, check tire pressure, visible sidewall condition, valve stems, wheel security, and any sign of cracking, bulging, or irregular seating on the rim. On cars using 650-18 tires, make sure the tire and wheel both correspond to the 18-inch fitment. On cars using 30X6.50 notation, confirm that the wheel setup matches that antique-format specification rather than assuming the size from memory.

A short walk-around is only the first step on a car of this age. Steering play, brake response, and overall chassis condition should also be evaluated before road use, especially after storage. An Auburn 120 Series can look ready while still needing mechanical attention, so the safest habit is to treat each drive as a fresh pre-trip inspection rather than a routine modern-car start-up.

An Auburn 120 Series on period-style tires should be driven at moderate, conservative speeds that respect both pre-war vehicle dynamics and bias-ply tire behavior. Even with correct fitment, these tires are part of a 1929 driving system that includes older steering, braking, suspension, and wheel technology. The goal is stable, controlled touring rather than sustained high-speed operation.

In practical terms, the right speed is whatever allows the Auburn 120 Series to remain settled, predictable, and comfortably within the capabilities of its tires and chassis on current roads. Road crown, grooves, crosswinds, and braking distances will all feel different than they do in a modern car. Owners who keep speeds modest and leave generous following distance will usually get the best experience from a correctly fitted set.