The 1927 Auburn 66WW Series comes from an era when American automobiles balanced emerging style, touring comfort, and mechanical simplicity in equal measure. Auburn models of the late 1920s appeal to collectors who appreciate that transitional pre-war character, and tire choice plays a major role in preserving it. For this exact model, the primary fitment centers on bias-ply construction, with 30X6.00 and 6.00-18 appearing as the applicable sizes. That makes the key decision less about modern performance categories and more about understanding vintage sizing language, wheel compatibility, and the appearance you want the car to carry. Careful fitment review is especially important on restoration-minded cars before putting them back on the road.
Which Tire Size Is Right for The 1927 Auburn 66WW Series
The 1927 Auburn 66WW Series uses two applicable bias-ply tire sizes, and the first step is understanding how those vintage size systems relate to the car's wheel setup. Because one size is written in antique diameter-by-section form and the other in numeric bias-ply form, confirming the exact wheel and tire arrangement on the car matters before choosing a replacement.
30X6.00 is an antique diameter-by-section size, meaning the first number refers to the tire's approximate overall diameter in inches and the second number refers to its nominal section width. On this Auburn, it represents a traditional pre-war style bias-ply fitment rather than a modern metric or later alphanumeric system. This format is especially relevant to buyers trying to keep an early-car presentation that looks appropriate for a 1920s automobile. It is best evaluated carefully against the actual wheel and current setup on the car, particularly if the vehicle has been restored or updated over time.
6.00-18 is a numeric bias-ply size in which 6.00 indicates the tire's nominal section width in inches and 18 identifies the rim diameter. For the 1927 Auburn 66WW Series, this is a classic vintage bias-ply fitment language that aligns more closely with later replacement-style sizing than the older diameter-by-section format. It can be a useful choice for owners comparing period-style replacement options on an 18-inch wheel. The practical step is confirming that the Auburn is actually running the 18-inch wheel setup before selecting this size.
Sub-model fitment is straightforward here because the covered 1927 Auburn 66WW Series configuration uses the same pair of applicable bias-ply sizes. Even so, checking the exact sub-model helps confirm that the car has the expected wheel and tire arrangement before replacement.
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1927 Auburn 66WW Series 6 Cyl.
The 1927 Auburn 66WW Series 6 Cyl. uses the same vintage bias-ply fitment pattern found on this model line, with both 30X6.00 and 6.00-18 associated with it. That makes tire selection more about verifying the wheel setup already on the car and choosing the period-style tire presentation that suits the restoration.
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.
Frequently Asked Questions
Common questions for the 1927 Auburn 66WW Series usually center on interpreting its vintage tire sizes, confirming the wheel setup, and choosing a bias-ply tire that suits both restoration goals and road use.
Tire Size & Fitment
What tire size fits a 1927 Auburn 66WW Series?
The 1927 Auburn 66WW Series uses two applicable bias-ply tire sizes: 30X6.00 and 6.00-18. Those are both vintage fitment formats, but they describe the tire in different ways, with 30X6.00 using an older diameter-by-section style and 6.00-18 using numeric bias-ply sizing tied to an 18-inch rim.
The practical decision is confirming which wheel and tire arrangement is actually on the car before ordering replacements. Early vehicles are often restored, re-wheeled, or updated over time, so the size on the sidewall, the wheel diameter, and the physical setup on the Auburn should all agree before a new tire is selected.
What size rim does a 1927 Auburn 66WW Series use?
The 1927 Auburn 66WW Series uses an 18-inch rim with the 6.00-18 tire size. That rim diameter is the clearest wheel reference in the fitment information for this vehicle and is the key number to verify when the car is using the numeric bias-ply size.
Wheel confirmation matters because 30X6.00 follows an older sizing convention that does not state rim diameter in the same way. A buyer standing in front of the car should check the actual wheel diameter and compare it with the tire currently mounted, especially if the Auburn has been through a restoration or has replacement wheels from an earlier repair.
What does 30X6.00 mean on a 1927 Auburn 66WW Series?
On a 1927 Auburn 66WW Series, 30X6.00 is an antique diameter-by-section tire size. The 30 refers to the tire's approximate overall diameter in inches, while 6.00 refers to its nominal section width. It is a traditional early-vehicle sizing style and represents a bias-ply tire fitment for this Auburn.
That older format can be unfamiliar because it does not read like later numeric bias-ply or modern radial sizing. The most useful next step is to match that size against the tire already on the car and verify the wheel setup, since an early Auburn may have seen changes during restoration, long-term storage, or past replacement work.
Choosing the Right Tire
What should I consider when choosing a tire for a 1927 Auburn 66WW Series?
Start with the correct applicable size for the car's actual wheel setup, which means confirming whether the Auburn is using 30X6.00 or 6.00-18. Both are bias-ply fitments, so the main choice is not between modern tire categories but between vintage size formats that need to match the car as equipped.
A restoration-minded buyer should also think about how the tire will look on the car and how the Auburn will be used after installation. Cars from this era benefit from careful attention to wheel diameter, overall stance, and period-style presentation, while occasional road use adds the need to inspect clearance, condition, and inflation before driving.
How do I choose between the available 30X6.00 and 6.00-18 tires for a 1927 Auburn 66WW Series?
The right choice depends on which of those two vintage sizes matches the Auburn's current wheel and tire arrangement. 30X6.00 uses an older diameter-by-section system, while 6.00-18 is a numeric bias-ply size tied directly to an 18-inch rim, so they should not be treated as interchangeable by name alone.
Comparing the sidewall marking on the existing tire is a good starting point, but it should be backed up by a wheel measurement on the car itself. That approach helps avoid ordering a vintage tire that suits the model generally but not the exact wheel setup on an individual car that may have been altered years ago.
What rim-fitment details matter when choosing 1927 Auburn 66WW Series tires?
Rim diameter is the most important starting point, especially because 6.00-18 clearly points to an 18-inch wheel while 30X6.00 follows an older naming system. On a pre-war car like the 1927 Auburn 66WW Series, matching the tire to the wheel arrangement on the vehicle matters more than relying on size language alone.
Buyers should inspect the wheel itself, confirm the tire marking currently in use, and make sure the new tire matches the setup they intend to keep on the car. That is particularly important on collector vehicles that may have replacement rims, mixed parts from earlier restorations, or long-standing fitment changes that are easy to overlook.
Restoration & Appearance
Which tire should I choose for a period-style 1927 Auburn 66WW Series?
A period-style 1927 Auburn 66WW Series starts with the correct vintage bias-ply size that matches the car's actual wheel setup, either 30X6.00 or 6.00-18. Both fitment types reflect early tire-sizing practice, so the most authentic-looking result usually comes from staying within the proper vintage size language for the car as equipped.
Appearance on a pre-war Auburn depends heavily on proportion and stance, not just the printed size on the sidewall. Anyone pursuing a highly exact restoration should compare the car against marque references, period photos, or build documentation so the chosen tire complements the specific restoration approach rather than only the model name.
Does correct tire fitment matter for a 1927 Auburn 66WW Series restoration?
Correct tire fitment matters a great deal on a 1927 Auburn 66WW Series because tires strongly affect the car's visual balance, ride height impression, and overall period presentation. Using the proper vintage bias-ply size format helps the car look appropriate to its era instead of carrying a tire that appears too modern or mismatched.
Fitment accuracy also protects the practical side of the restoration by reducing the chance of wheel mismatch or unwanted clearance issues. Even on a car that is shown more than driven, checking the exact wheel setup and keeping the tire choice consistent with the restoration's goals usually leads to a more convincing and usable result.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1927 Auburn 66WW Series?
Yes, modifications can affect tire fitment on a 1927 Auburn 66WW Series, especially on a vehicle that may have been restored or repaired across many decades. Different wheels, brake changes, suspension work, or body adjustments can alter the tire size the car can use comfortably, even when the model is associated with 30X6.00 and 6.00-18.
That is why the current setup on the individual car matters more than assumptions based on model year alone. Checking wheel diameter, tire marking, steering clearance, and the space around the fenders helps confirm that the replacement tire suits the Auburn as it sits today rather than only how it may have left the factory.
What should I inspect before driving a 1927 Auburn 66WW Series on new tires?
Before driving a 1927 Auburn 66WW Series on new tires, inspect the wheel condition, valve stems, inflation, and the way the tire seats on the rim. A short visual check for sidewall interference, steering clearance, and even spacing around the fenders is especially worthwhile on an early car with vintage-sized bias-ply tires.
The rest of the car deserves attention too, because tire installation does not overcome problems elsewhere in the chassis. Looking over wheel fasteners, steering components, suspension condition, and brake function helps make sure the Auburn is ready for road use, particularly if it has spent long periods parked between outings.
How should tires on a collector 1927 Auburn 66WW Series be maintained?
Tires on a collector 1927 Auburn 66WW Series should be kept properly inflated, inspected regularly, and protected from long periods of sun, heat, and ozone exposure. Even when tread wear is minimal, a low-use vintage car can develop age-related issues such as cracking, flat spotting, or slow air loss that deserve attention.
Routine checks before each outing help catch problems early and are especially important on bias-ply tires used only seasonally. It also helps to keep the Auburn in a clean, dry storage environment and to examine the tires for cuts, bulges, or sidewall changes after any extended sit, tour, or transport move.
