The 1927 Locomobile 66 comes from the final years of an American luxury marque known for large, prestigious motorcars built for a very particular buyer. On a car of this era, tire choice is closely tied to authenticity, wheel type, and intended road use rather than modern performance trends. The 1927 Locomobile 66 uses bias-ply sizing in two period formats, 30X5.77 and 30x5, both tied to a 30-inch overall tire height and a 7-inch wheel diameter context. That makes the decision less about modern substitution and more about confirming the exact wheel setup, preserving the right visual character, and choosing a tire style suited to restoration use.
Which Tire Size Is Right for The 1927 Locomobile 66
The 1927 Locomobile 66 uses two primary tire sizes, and the right choice depends on confirming the exact wheel and tire style on the car. Both are bias-ply fitments tied to the covered 8 Cyl. configuration, so the first step is identifying whether the car is set up for 30X5.77 or for the antique 30x5 beaded-edge style before selecting a replacement.
In the size 30X5.77, the first number refers to an approximate 30-inch overall tire diameter and the second number refers to an approximate section width of 5.77 inches. This is a bias-ply fitment and represents a period tire format used on late-1920s automobiles where preserving the proper profile and construction matters. On a 1927 Locomobile 66, this size is best approached as a wheel-and-fitment confirmation exercise, especially on a restored car that may have seen wheel changes over time. It is the right size to evaluate when the car is not using a 30x5 beaded-edge setup.
The size 30x5 uses an older diameter-by-section convention, meaning the tire is built around an approximate 30-inch outside diameter and a 5-inch section width. It is also a bias-ply fitment, but here the key distinction is its antique inch and beaded-edge style presentation, which places wheel design and bead-seat compatibility at the center of the decision. For a 1927 Locomobile 66, this size usually matters most to a restoration-oriented owner trying to match an early-style wheel arrangement. Before choosing it, the actual wheel type should be verified carefully rather than assuming interchangeability with 30X5.77.
Fitment is straightforward at the sub-model level because the covered 8 Cyl. configuration uses the same two primary tire sizes. What matters is not trim variation, but confirming which wheel and tire style the individual car carries before choosing between the two period bias-ply formats.
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1927 Locomobile 66 8 Cyl.
The 1927 Locomobile 66 8 Cyl. uses either 30X5.77 or 30x5 in bias-ply construction. That means tire selection starts with the wheel and bead-seat arrangement on the car, followed by the owner's goal for road use, restoration character, and period-style appearance.
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
These 1927 Locomobile 66 tire FAQs focus on the two period bias-ply sizes, antique wheel considerations, restoration-minded selection, and the safety checks worth making before putting a low-use collector car back on the road.
Tire Size & Fitment
What tire size fits a 1927 Locomobile 66?
The 1927 Locomobile 66 uses two primary bias-ply tire sizes: 30X5.77 and 30x5. Both are associated with the 1927 Locomobile 66 8 Cyl., so the car is not locked to one universal size without first confirming which wheel and tire arrangement it actually has.
That distinction matters because 30x5 is an antique beaded-edge style fitment, while 30X5.77 is a different period sizing format. On a restored or long-owned collector car, wheels may have been changed decades ago, so the safest path is to confirm the wheel type, bead-seat design, and present tire size before ordering replacements.
What size rim does a 1927 Locomobile 66 use?
The 1927 Locomobile 66 uses a 7-inch rim diameter with its primary tire fitment. That rim diameter is tied directly to the 30X5.77 fitment and is the most useful starting point when checking whether the car still carries the wheel setup needed for the intended replacement tire.
A collector car of this age should never be sized by appearance alone. The wheel should be measured and inspected carefully, especially if the car has older restorations or mixed-era parts, because antique tire sizing can look similar while using very different bead-seat and mounting arrangements.
What does 30x5 mean on a 1927 Locomobile 66?
On a 1927 Locomobile 66, 30x5 is an antique diameter-by-section tire size. The 30 refers to the tire's approximate outside diameter in inches, and the 5 refers to its approximate section width, also in inches, rather than a modern rim-and-aspect-ratio sizing convention.
That matters because a size like 30x5 should be interpreted as an early tire format, not as a modern equivalent measurement. Buyers should treat it as a signal to verify wheel design, bead-seat style, and overall restoration setup before choosing a replacement, especially when another period size such as 30X5.77 also appears on the same model.
Choosing the Right Tire
What should I consider when choosing a 30X5.77 tire for a 1927 Locomobile 66?
Start by confirming that 30X5.77 is the actual tire size used on the car rather than the alternate 30x5 setup. On a 1927 Locomobile 66, the choice centers on matching the wheel arrangement, keeping the proper bias-ply construction, and preserving the visual character expected of a late-1920s luxury automobile.
Selection should also account for how the car will be used. A show-focused restoration may emphasize period-style appearance, while a car driven on tours still needs the same size discipline but with close attention to wheel condition, tire age, and consistent mounting across all four corners.
How do I choose between the available 30X5.77 and 30x5 tires for a 1927 Locomobile 66?
The correct choice is determined by the wheel and bead-seat setup on the car, not by preference alone. Although both 30X5.77 and 30x5 are primary bias-ply fitments for the 1927 Locomobile 66 8 Cyl., they represent different period tire formats and should not be treated as casual substitutes.
A careful owner should inspect the current tire markings, measure the wheel, and confirm whether the car uses a beaded-edge style arrangement before selecting one size over the other. That approach protects both appearance and mounting compatibility, which are especially important on pre-war luxury cars with antique tire formats.
What rim-fitment details matter when choosing 1927 Locomobile 66 tires?
Rim diameter is the first fitment detail to confirm, and the 1927 Locomobile 66 uses a 7-inch rim diameter in its primary fitment information. Beyond diameter, the wheel's actual tire-seat design is equally important because this model spans two antique bias-ply size conventions, including a beaded-edge style option.
Collectors should also look at wheel condition before mounting new tires. Rust, distortion, old repairs, and mismatched rims can create problems even when the nominal size seems correct, so antique wheels deserve the same level of scrutiny as the tire choice itself.
Restoration & Appearance
Which tire should I choose for a period-style 1927 Locomobile 66?
A period-style 1927 Locomobile 66 should stay with one of its proper bias-ply primary sizes, either 30X5.77 or 30x5, depending on the wheel setup on the car. For a vehicle from this era, construction type and sizing format are central to maintaining the right stance and visual relationship between tire and body.
Exact originality can vary from car to car, especially on antiques with long restoration histories. When authenticity matters beyond general period style, the next step is to compare the car against marque references, restoration records, and surviving wheel details rather than relying only on broad year-make-model fitment.
Does correct tire fitment matter for a 1927 Locomobile 66 restoration?
Correct tire fitment matters a great deal on a 1927 Locomobile 66 because the tire is a major visual element on an antique luxury car. The difference between 30X5.77 and 30x5 is not just a number change; it can affect how properly the tire matches the wheel type and the car's overall presentation.
It also affects practicality. A restoration that looks right but uses the wrong wheel-and-tire relationship can create mounting issues or compromise confidence on the road, so confirming the correct period-style fitment is just as important as selecting paint, trim, or other visible restoration details.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1927 Locomobile 66?
Yes. Any change to wheels, hubs, brakes, suspension height, or fender positioning can affect tire fitment on a 1927 Locomobile 66, even when the car still appears stock at a glance. That is especially important on antiques that may have been restored or updated in different eras using non-original wheel components.
The practical concern is clearance and compatibility, not just size marking. A modified Locomobile should have its actual wheel diameter, bead-seat style, side clearance, and steering clearance checked before new tires are mounted, because early tire formats leave less room for assumption than modern sizing systems.
What should I inspect before driving a 1927 Locomobile 66 on new tires?
Before driving a 1927 Locomobile 66 on new tires, inspect the wheels, valve hardware, and mounting surfaces as carefully as the tires themselves. Antique cars benefit from a full walk-around that includes checking for proper seating, even inflation, adequate clearance, secure wheel attachment, and any signs of rubbing once the car is on the ground.
Road readiness also depends on the rest of the chassis. Steering play, brake condition, spring hardware, and wheel bearing condition can all influence how confidently an antique car tracks and rides, so new tires should be treated as one part of a broader pre-drive inspection rather than the entire solution.
How should 30X5.77 or 30x5 tires on a collector 1927 Locomobile 66 be maintained?
Collector-car tires in 30X5.77 or 30x5 should be maintained with regular pressure checks, routine visual inspection, and careful storage habits. On a 1927 Locomobile 66, special attention should go to sidewall cracking, tread separation, cuts, bulges, and any air loss that appears after the car has been parked for longer periods.
Storage conditions matter almost as much as mileage on a low-use antique. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve tire condition, and occasional inspection of wheel surfaces and bead areas can catch issues before the next tour or event.
