Auburn 76 Series Tires

Auburn 76 Series uses two tire sizes in 1928: 28X5.25 and 5.25-18. Those sizes are not interchangeable descriptions of the same thing. 28X5.25 is an older antique-style size that describes overall tire diameter and section width, while 5.25-18 is a numeric bias-ply size that includes an 18-inch rim diameter directly in the code.

The practical step is to identify which wheel and tire system your Auburn 76 Series actually carries before selecting a replacement. Start with the size marked on the existing tire if it is readable, then compare that with the wheel dimensions on the car. If the car is part of a restoration, original manuals, period photos, and Auburn specialists can help sort out which of the two systems belongs on your specific car.

On an Auburn 76 Series, 28X5.25 is an antique diameter-by-section size. The first number, 28, refers to the tire's approximate outside diameter in inches, not the wheel size. The second number, 5.25, refers to nominal section width, so the code describes the tire's overall dimensions rather than giving you a direct rim diameter the way a later size such as 5.25-18 does.

That matters because a modern buyer can easily mistake the first number for wheel diameter, which would lead to the wrong tire choice. When an Auburn 76 Series carries an antique-format size, the wheel diameter has to be confirmed separately from the car's wheel or from period reference material. Treat the size code as only part of the identification process, not the entire answer.

A 1928 Auburn 76 Series can show two sizes because that model year sits in a transition between two different sizing conventions. One listed size, 28X5.25, uses the older outside-diameter format, while 5.25-18 uses the later rim-diameter-based numeric format. That means the difference is not just notation; it points to a real difference in wheel and tire specification.

The safest way to sort that out is to inspect the actual wheels on the car and compare them to the size markings on any existing tires or tubes. Restoration history also matters, because many collector cars have had wheels changed during their lives. If your Auburn 76 Series has been rebuilt or modified, verify the present hardware on the car rather than relying only on the model year.

Auburn 76 Series fitments in the listed sizes point toward bias-ply collector tire practice, and 5.25-18 in particular is a numeric bias-ply size that requires a tube. Antique-format applications such as 28X5.25 are also commonly tube-type in collector service. On a car of this era, tube use is part of the normal fitment approach rather than an unusual add-on.

When replacing tires on an Auburn 76 Series, inspect the wheels as carefully as the tires. Rust, pitting, old rim strips, or rough edges can damage a new tube even when the tire itself is correct. A fresh tube and proper wheel preparation are worth treating as part of the job, especially on a late-1920s car that may spend long periods parked between drives.

The correct tire size for a 1928 Auburn 76 Series starts with identifying whether the car is set up for 28X5.25 or 5.25-18. Those are two different size systems, and one of them includes an 18-inch rim diameter while the other does not state wheel diameter in the code. Existing tire markings, wheel measurements, and restoration records are the most useful clues.

Begin with the hardware on the car rather than assumptions about the model name alone. Measure the wheel, read any surviving markings, and compare front and rear to make sure the car has a matched set. If the Auburn 76 Series has a long restoration history, use marque literature or a knowledgeable Auburn specialist to confirm whether the current wheels match the intended configuration.

The listed Auburn 76 Series sizes point to two distinct sizing eras rather than a wide spread of modern tire families. 28X5.25 belongs to an earlier antique diameter-by-section convention, while 5.25-18 belongs to the later numeric bias-ply convention built around rim diameter. The difference is fundamental because it affects how the tire is identified and which wheel it belongs on.

For a buyer, the key point is that the right choice depends on preserving the correct wheel-and-tire relationship for the specific car. If your goal is period authenticity, the tire should match the wheel system the Auburn 76 Series actually uses, not simply the broad year range. If your goal is road use within collector-car limits, proper fit and correct tube-type installation matter just as much as appearance.

Auburn 76 Series restoration work should begin with the wheels already on the car, because 1928 fitments include both 28X5.25 and 5.25-18. That split means the car may use either an antique outside-diameter format or a later numeric bias-ply format. The right tire depends on matching the present wheel specification and the intended restoration standard.

Check whether the car has been updated over the years, whether the front and rear wheels match, and whether the tire markings still align with the wheel dimensions. It is also smart to decide early whether the project aims for strict judging accuracy or dependable tour use within period limits. That decision will shape how closely the final tire choice needs to follow original-era appearance.

Auburn 76 Series should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, ozone sources, and prolonged contact with petroleum products. Clean floors, stable temperature, and moderate inflation help the tires hold their shape during inactivity. A late-1920s collector car benefits from the same careful storage habits given to its paint, trim, and interior.

If the Auburn 76 Series will sit for long periods, move the car occasionally to avoid flat spotting or place it on stands in a way that protects the suspension and wheels. Tire covers are useful when the car is displayed near windows or shop lights. It is also worth checking inflation periodically rather than assuming a rarely driven car needs no tire attention.

Tires on an Auburn 76 Series should be inspected before every drive and more closely several times each season, even if the mileage is very low. Collector tires can age and lose condition long before tread is worn out. On a late-1920s car, sidewall cracking, irregular shape, tube-related leaks, and wheel condition all deserve regular attention.

A practical routine is to check inflation, sidewalls, tread surface, valve stems, and the wheel area before the car leaves the garage. Pay special attention after winter storage or after the car has been parked for many weeks. If the Auburn 76 Series sees parade, tour, or show-field use, a specialist inspection from time to time adds useful peace of mind.

Auburn 76 Series tires should be replaced when age, cracking, hardening, repeated air loss, casing distortion, or visible damage suggests the tire is no longer trustworthy, even if the tread still looks deep. Collector-car tires often age out before they wear out. On a car from 1928, condition matters more than mileage because the tire may spend far more time parked than driven.

Replacement decisions should also account for the condition of the tubes, flaps, and wheels, since those parts work together as a system. If an older tire has an uncertain history, cautious replacement is usually the better path than trying to stretch its service life. That same logic applies especially strongly to any period tire whose age or storage history cannot be confidently traced.

Auburn 76 Series is associated here with two period-correct size conventions for 1928: 28X5.25 and 5.25-18. That tells you the model sits at a point where more than one style of tire identification belongs in the period. It does not mean every Auburn 76 Series used both interchangeably on the same car; it means the correct original-type fitment depends on the specific wheel setup and configuration.

For restoration work, the best approach is to match the tire to the car's intended factory-era configuration rather than choosing only by appearance. Original sales literature, service material, surviving unrestored examples, and Auburn specialists are the best references when authenticity matters. That extra step can prevent a handsome restoration from ending up on a tire size that belongs to a different wheel system.

Correct tire fitment can matter significantly to the value, presentation, and judging of an Auburn 76 Series because wheels and tires strongly affect stance, proportion, and period accuracy. A car wearing the wrong size system can look subtly off even to casual observers. On a recognized collector car from the late 1920s, judges and experienced buyers often notice whether the tire format matches the era of the car.

For an Auburn 76 Series that will be shown, preserving the proper relationship between tire size, wheel type, and overall appearance is often worth the extra research. Marque clubs, period photographs, and experienced restorers can help settle close calls. Even outside judged competition, correct tire fitment usually supports a more convincing restoration and a more faithful driving character.

Auburn 76 Series restoration work should treat sidewall style as part of the period look, not as a decorative afterthought. Late-1920s cars can present very differently depending on whether the tire has a darker, more understated appearance or a brighter period style. The correct answer depends on the exact restoration goal and the visual standard you are trying to match for your specific Auburn 76 Series.

A show-oriented restoration usually benefits from comparing the planned tire appearance against factory literature, surviving period photos, and marque-club guidance. The right sidewall style should complement the car's wheel finish, body color, and trim level rather than overpower them. When authenticity is the priority, matching the period presentation of the whole car matters more than choosing the most eye-catching tire treatment.

Auburn 76 Series can be driven on public roads when the tires are the correct size, properly installed, and in sound condition, but safety depends on the entire vehicle rather than the tires alone. A 1928 car operates within a very different mechanical world from a modern vehicle, with older braking, steering, suspension, and lighting expectations. Tire condition is only one part of roadworthiness.

Keep use realistic and consistent with the car's age, capability, and setup. Before regular road movement, make sure the Auburn 76 Series has been checked as a full system, including wheels, tubes, brakes, bearings, steering linkage, and alignment. A carefully prepared collector car can be enjoyable on the road, but it should always be driven with a margin for age and mechanical limits.

Before driving an Auburn 76 Series, inspect tire inflation, sidewall condition, tread surface, valve stems, and any sign of shifting, cracking, or tube-related leakage. Also look closely at the wheels, because a correct tire cannot perform properly on a compromised rim. On a 1928 car, routine pre-drive checks are part of ownership, not an occasional precaution.

Beyond the tires, make sure the Auburn 76 Series has sound brakes, free steering movement, secure wheel attachment, and no fresh fluid leaks that could reach the tires or braking surfaces. If the car has been parked for an extended period, give it a more thorough review before heading onto the road. A few minutes in the garage can prevent avoidable trouble once the car is moving.

Auburn 76 Series should be driven at conservative speeds that respect both the car's late-1920s design and the limitations of period-style collector tires. Even when the tires are new, the overall vehicle was not engineered around modern braking distances, suspension behavior, or highway traffic pace. Appropriate speed is less about what the engine can do and more about what the entire car can safely manage.

In practice, that means using the Auburn 76 Series for secondary roads, touring, and event driving rather than treating it like a modern freeway car. Smooth inputs, extra stopping distance, and avoiding abrupt lane changes all help the tires and chassis work within their comfort zone. If the car feels unsettled at speed, reduce pace immediately and inspect the setup before driving farther.