Locomobile 66 Tires
Locomobile 66 belongs to the final chapter of one of America's most prestigious luxury makes, built in the late 1920s as the company moved through its closing years. Cars from this period combine high-grade coachbuilt presence with transitional mechanical details, which is why tire selection deserves more care than a quick size match. For 1927, Locomobile 66 appears with two closely related antique-format sizes, and those codes can mislead modern buyers because the first number is the tire's overall diameter rather than the wheel diameter. The most important first step is to confirm the actual 20-inch rim on the car before choosing between the listed sizes.
Locomobile 66 Tire Size Guide
Locomobile 66 uses 2 distinct tire sizes across the 1927 model year. Both are antique diameter-by-section sizes, so the leading number is the tire's outside diameter rather than the wheel diameter. That distinction matters here because both listed sizes mount on 20-inch rims, and the wheel size must be confirmed separately from the size code itself.
30X5.77 is a 1927 Locomobile 66 size used within this model year range. In this format, 30 indicates an overall tire diameter of about 30 inches and 5.77 indicates the section width, while the rim diameter is separate from the code and must match the wheel on the car. Choose 30X5.77 only if the car is already fitted for that exact size and verify the wheel before proceeding.
30X5 is another 1927 Locomobile 66 size and is the one with currently listed products. Here, 30 refers to the tire's outside diameter, 5 refers to the nominal section width, and the available products are built for a 20-inch rim rather than a 30-inch wheel. This size suits cars using the narrower 30-inch by 5-inch specification, and because the available tires are bias ply, a tube is required.
Locomobile 66 Tires by Year
The year listing breaks Locomobile 66 tire fitment down by production year so you can match the car to the correct size before narrowing product choices. In 1927, more than one size is listed, so the specific wheel and configuration need to be checked rather than relying on the year alone. The leading number in each antique size is the tire's outside diameter, not the wheel size, so confirm the 20-inch rim directly on the car when reviewing the year-by-year options.
1927 Locomobile 66
- 30X5.77
- 30X5
Best Locomobile 66 Tires for Sale
Available Locomobile 66 tires cover 2 products from 2 brands across the listed sizes. Confirm the correct size and the 20-inch rim diameter on the car before selecting; one option is listed only as a new-old-stock style equivalent and period-style bias-ply fitment remains the focus here.
30X5 Products
These are the available products for 30X5.
Frequently Asked Questions
The FAQ for Locomobile 66 focuses on the antique tire sizing used in 1927, how to separate outside diameter from wheel diameter, and how to choose between the listed bias-ply options for a proper period-style fit.
Size Basics & Fitment
Locomobile 66 uses two listed tire sizes for 1927: 30X5.77 and 30X5. The available products shown for 30X5 are built for a 20-inch rim, which is an important point because the antique-style size code does not state the wheel diameter directly. Both sizes belong to the same model year, so a year match alone is not enough to choose correctly.
Start by checking the tire already on the car, the rim itself, and any original paperwork that stayed with the vehicle. If the car carries 20-inch wheels and is set up for 30X5, the listed bias-ply options are the relevant place to focus. If the car appears to use 30X5.77, confirm that specification carefully before moving ahead, since the two sizes are related but not interchangeable by assumption.
On a Locomobile 66, 30X5 is an antique diameter-by-section size. The 30 is the tire's approximate outside diameter in inches, not the wheel size, and the 5 is the nominal section width. The available products in this size mount on a 20-inch rim, which is why modern buyers have to read antique size codes differently from later numeric or radial sizes.
That decoding matters because a buyer can easily mistake the first number for the wheel diameter and end up chasing the wrong tire. For Locomobile 66, the practical check is the actual rim diameter on the car, then the stamped or known tire size, then the construction style you want for the restoration. Since the listed 30X5 products are bias ply, they follow period-correct construction and require tubes.
A 1927 Locomobile 66 can show both 30X5.77 and 30X5 because more than one fitment appears within that model year. The difference is not simply a duplicate listing with alternate wording; these are separate antique-format sizes with different section widths. That makes the specific wheel and existing setup on the car more important than the year by itself.
Owners should treat the year as the starting point and then verify the actual configuration on the vehicle. Check the present tire size, measure the rim if needed, and compare against any period records associated with the car. That extra step is especially important on late prewar luxury cars like Locomobile 66, where surviving examples may have had wheel or tire changes over time.
The listed Locomobile 66 products in 30X5 use a 20-inch rim. That is separate from the 30 in the 30X5 size code, because antique sizing uses overall tire diameter first and section width second. Wheel diameter has to be confirmed from the actual rim specification rather than read directly from the antique-style tire code.
When checking a Locomobile 66, inspect the wheel before making any assumptions from the tire sidewall alone. If the car already wears 30X5 tires, the matching product fitment points to a 20-inch rim. On a car associated with 30X5.77, it is wise to confirm the wheel and current setup carefully so the replacement tire matches both the rim and the vehicle's established specification.
Buying the Right Tire
The correct way to confirm tire size for a 1927 Locomobile 66 is to use the year listing as a starting point and then verify the actual size mounted on the car. Two sizes are associated with that year: 30X5.77 and 30X5. The available 30X5 products are built for 20-inch rims, so the wheel itself becomes part of the identification process.
Begin with the tire sidewall if the car still wears an old set, then inspect the wheel dimensions, and finally compare those findings to any original paperwork, restoration notes, or marque-club guidance tied to the car. That sequence is more reliable than selecting by model year alone. On a collector Locomobile 66, one careful inspection now helps avoid mounting the wrong antique-format size later.
Locomobile 66 tire listings currently show two sidewall styles in the available 30X5 products: Blackwall and Wide Whitewall. The Blackwall option appears on the Hartford Airplane tire, while the Wide Whitewall option appears on the Firestone Classic Bias Ply equivalent listed as 600-20 for the 30X5 application. Both are bias-ply constructions aimed at period-style fitment.
Choosing between them depends on how the car is being restored and presented. A Blackwall often suits a more restrained or earlier visual treatment, while a wide whitewall creates a more formal late-1920s luxury appearance. On a Locomobile 66, sidewall style changes the look dramatically, so it is worth comparing the car's surviving photos, restoration goals, and show standards before settling on one version.
The currently listed Locomobile 66 tire options come from two brands: Hartford and Firestone. Hartford appears in the Hartford Aero series for 30X5, and Firestone appears in the Classic Bias Ply line through a 600-20 equivalent for the same 30X5 application. Both available choices are period-style bias-ply tires rather than modern radial replacements.
That gives Locomobile 66 owners a choice between two recognizable vintage-oriented approaches within the same general fitment family. Brand selection usually comes down to restoration goals, preferred visual style, and how closely you want the tire's appearance to match the era of the car. Once the size and rim are confirmed, comparing the brand, series, and sidewall treatment becomes the more meaningful next step.
Maintenance & Longevity
A Locomobile 66 should be stored in a cool, dry, dark space with the tires kept away from sunlight, electric motors, ozone sources, and standing moisture. Bias-ply collector tires do best when the car is kept clean and the tire pressures are maintained so the casing is not left partially collapsed. Long periods under full vehicle weight can also encourage flat spotting and sidewall stress.
For a Locomobile 66 that is driven sparingly, roll the car occasionally or place it on stands if the storage period is extended and the chassis setup allows it safely. Inspect the tubes and valve stems as part of the same routine, since tube-type systems depend on more than the outer casing alone. Good storage habits matter as much as tread depth on a low-mile collector car.
Tires on a Locomobile 66 should be inspected before every drive and more thoroughly at regular intervals even when the car is not being used much. On an antique-format bias-ply setup, look for sidewall cracking, tread separation, uneven wear, bead problems, tube-related air loss, and any sign that the casing has been damaged in storage. Collector-car use patterns can hide age-related issues because the tire may still show plenty of tread.
A practical routine is a quick visual and pressure check before moving the car, then a more detailed inspection at the start and end of each driving season. If the Locomobile 66 sees parade, tour, or show field use, include the spare in that review as well. Any vibration, sudden pressure loss, or visible casing change deserves immediate attention from a shop familiar with vintage tires.
Locomobile 66 tires should be replaced when age, cracking, hardening, casing damage, repeated air loss, or structural changes appear, even if the tread still looks usable. On collector cars, deterioration often comes from time and storage conditions rather than mileage. Bias-ply and tube-type assemblies can look acceptable at a glance while still being too old or too compromised for dependable road use.
That is especially true for an infrequently driven Locomobile 66, where the owner may not notice gradual aging from one season to the next. If a tire has uncertain history, visible weathering, or signs of internal stress, replacement is the wiser path than trying to stretch more use from it. A specialist inspection is worthwhile whenever the car is being returned to service after a long period off the road.
Restoration & Authenticity
Locomobile 66 is associated here with two 1927 tire sizes, 30X5.77 and 30X5, and the available replacement products for 30X5 are bias-ply tires in Hartford Aero and Firestone Classic Bias Ply series. That gives a period-style direction, but it does not reduce the car to one universal original-tire answer because more than one size is tied to the model year. Original specification on an individual car can vary with surviving configuration and restoration history.
For an accurate restoration, use the car itself as the primary reference along with factory literature, marque records, and any original wheel or tire markings still present. A Locomobile 66 restored for formal judging should match size, construction style, and visual treatment as closely as possible to the car's established specification. The year gets you close, but the individual car should settle the final choice.
Correct tire fitment can affect both the visual credibility and judged accuracy of a Locomobile 66. Size, profile, sidewall treatment, and period-appropriate construction all contribute to whether the car presents as a coherent late-1920s luxury restoration. Even when the tire physically mounts, the wrong dimensions or the wrong visual style can change stance and dilute authenticity.
For a high-level restoration, the tire should support the car's coachwork, ride height, and era-correct appearance rather than simply fill the wheel opening. Judges and experienced marque enthusiasts often notice those details quickly. If the goal is preservation rather than formal show competition, a well-chosen bias-ply tire in the right size family still helps the Locomobile 66 retain its proper character and proportions.
Locomobile 66 tire listings currently offer both Blackwall and Wide Whitewall styles in the available 30X5 products. Either can suit a period-minded restoration depending on the specific presentation of the car, but they create notably different visual results. Blackwalls tend to look more restrained, while wide whitewalls emphasize the formal luxury presence associated with many late-1920s American cars.
The right choice for a Locomobile 66 restoration depends on the car's body style, trim treatment, and the historical appearance you want to preserve. Contemporary photos, surviving original images, and marque-club guidance are the best references for settling that decision on an individual car. Once the size is confirmed, sidewall style becomes one of the biggest factors in how authentic the finished restoration feels.
Safety & Road Use
A properly selected and properly maintained bias-ply tire can be suitable for limited public-road use on a Locomobile 66 when the entire car is in sound mechanical condition. That includes correct size, sound wheels, proper tubes, stable inflation, and a chassis that has been inspected with vintage operation in mind. Safety depends on the whole vehicle system, not the tire by itself.
Locomobile 66 is a prewar luxury automobile with antique-format tire sizing, so road use should be thoughtful rather than casual. Keep speeds moderate, allow longer braking distances, and remember that steering and handling feel different from a modern car. If the car has been inactive for a long period, have the tire and wheel assemblies reviewed before returning it to road duty.
Before driving a Locomobile 66, check tire pressure, visible sidewall condition, tread integrity, wheel security, and valve stem condition on every mounted tire including the spare. Because the listed fitments are bias ply and tube type, air retention and casing condition both matter. It is also wise to make sure the tire size on the car matches the wheel and the intended setup.
A short walkaround catches many of the issues that interrupt old-car drives: soft tires, cuts, weather checking, and signs of movement at the rim. On a Locomobile 66, that routine should be paired with the usual vintage-car checks for brakes, steering response, and fluid condition. A few careful minutes in the garage are much easier than dealing with a tire or chassis problem once underway.
A Locomobile 66 running on period-style bias-ply tires should be driven at conservative, mechanical-sympathy speeds rather than at the pace of modern traffic. Even with fresh tires, the car's braking, steering, suspension, and overall road manners reflect its era. The appropriate speed is the one that keeps the car stable, allows generous stopping distance, and respects both the tire construction and the chassis design.
That usually means treating a Locomobile 66 as a touring, show, and occasional pleasure car instead of a sustained high-speed road car. Smooth inputs, moderate pace, and avoidance of heat buildup all work in the tire's favor. If the road or traffic environment demands modern high-speed responses, it is generally wiser to choose a different vehicle for that trip.