The 1927 Moon 60 Series comes from an era when American automobiles were transitioning from earlier narrow profiles toward more modern balloon-tire proportions, and tire choice still plays a major role in how the car looks and drives today. For a collector or restoration-minded owner, this is a vehicle where fitment details matter just as much as period appearance. The 1927 Moon 60 Series uses bias-ply tire fitments, with 29X4.75 and 4.75-20 both associated with this model. That makes the decision less about modernizing and more about confirming which size matches the wheels on the car. Careful wheel measurement is especially important before putting the car back on the road.
Which Tire Size Is Right for The 1927 Moon 60 Series
The 1927 Moon 60 Series uses two primary tire sizes, and the first step is confirming which wheel setup is on the car. These fitments differ by sizing system and rim diameter, so identifying the exact wheel dimension matters before choosing a replacement bias-ply tire. Once that is settled, the focus shifts to selecting the right period-style tire for the car's intended appearance and road use.
29X4.75 is an antique diameter-by-section size, meaning the first number refers to an approximate overall tire diameter of 29 inches and the second number refers to a section width of about 4.75 inches. This is a bias-ply fitment suited to the early automotive sizing conventions still seen on many late-1920s collector cars. Because this format is very different from later rim-diameter-first systems, it is easy to misread if the wheels have been changed over time. This size is best evaluated by confirming the actual wheel setup already on the car before choosing a replacement.
4.75-20 is a numeric bias-ply size in which 4.75 refers to the nominal section width in inches and 20 identifies the rim diameter. For a 1927 Moon 60 Series, it represents a more familiar vintage bias-ply notation built around a 20-inch wheel. This format is often easier for collectors to recognize, but it still needs to match the actual wheel diameter on the car rather than the model name alone. Choosing this size starts with confirming that the Moon still carries the correct 20-inch wheel arrangement.
Sub-model fitment is straightforward here, but wheel confirmation still matters because the covered Moon 60 Series configuration is associated with two tire sizes. Checking the exact wheel setup on the car is the key step before selecting a replacement bias-ply tire.
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1927 Moon 60 Series 6 Cyl.
The 1927 Moon 60 Series 6 Cyl. is associated with both 29X4.75 and 4.75-20 bias-ply fitments. That makes wheel verification especially important, since the right tire choice depends on matching the size format and rim diameter already in use on the vehicle.
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
Owners of a 1927 Moon 60 Series usually need to sort out vintage sizing, wheel diameter, restoration presentation, and road-readiness before choosing tires. These FAQs focus on exact fitment, bias-ply selection, and the inspections that matter on an older collector car.
Tire Size & Fitment
What tire size fits a 1927 Moon 60 Series?
The 1927 Moon 60 Series is associated with two primary bias-ply tire sizes: 29X4.75 and 4.75-20. Both are legitimate fitments for this exact year and model, but they use different sizing conventions and do not point to the same wheel setup.
The practical decision is confirming what is actually on the car before ordering tires. Check the wheel diameter, read the existing tire markings if they are still legible, and compare that information with the size you plan to use. On a late-1920s vehicle, wheels may have been changed during earlier repairs or restorations.
What size rim does a 1927 Moon 60 Series use?
A 1927 Moon 60 Series can be associated with either a 5.0-inch rim diameter when using 29X4.75 or a 20-inch rim diameter when using 4.75-20. Those are very different wheel arrangements, which is why this car cannot be selected by tire size alone without checking the wheels first.
The safest approach is to measure the wheel and match the tire to that measurement rather than relying on assumptions from the model name. Antique cars sometimes carry replacement wheels or older restoration work, and a mismatch between tire size and wheel diameter can stop the installation before the car ever leaves the garage.
Why does the 1927 Moon 60 Series have more than one tire size?
The 1927 Moon 60 Series is tied to two different bias-ply size notations, 29X4.75 and 4.75-20. They reflect different vintage sizing systems, and each one relates to a different wheel setup rather than simply being two interchangeable ways to describe the same tire.
That means the right choice comes from the car in front of you, not from the year and model alone. A collector vehicle may have retained its original-style wheels, been updated long ago, or been restored with a different arrangement. Confirming the actual wheel diameter and existing tire markings avoids choosing the wrong format.
Choosing the Right Tire
What should I consider when choosing a 29X4.75 or 4.75-20 tire for a 1927 Moon 60 Series?
Start by matching the tire size to the actual wheels on the 1927 Moon 60 Series. Since this model is associated with both 29X4.75 and 4.75-20 bias-ply tires, the key factors are correct size notation, correct rim diameter, and whether the tire suits the car's restoration goals and intended road use.
After size confirmation, consider how the car will be used. A vehicle aimed at careful show presentation may call for a different appearance emphasis than one driven regularly on tours. Tire age, wheel condition, tube requirements where applicable, and the overall condition of the chassis should all be reviewed before putting the car back into service.
How do I choose between the available 1927 Moon 60 Series tire fitments?
Choosing between the two fitments is really a matter of selecting the one that matches the wheel setup on the car. The 29X4.75 size uses an antique diameter-by-section format, while 4.75-20 uses a numeric bias-ply format tied to a 20-inch rim.
A buyer should not treat those sizes as casual alternatives. Measure the wheel, inspect the current tire markings, and compare the car's present setup with the intended replacement. Once the fitment is confirmed, the remaining decision becomes whether the tire supports a traditional visual presentation and the kind of driving the Moon will actually see.
What rim-fitment details should I compare when choosing 1927 Moon 60 Series tires?
Rim diameter is the first and most important detail to compare on a 1927 Moon 60 Series. The two associated tire sizes point to very different wheel dimensions, so choosing the correct tire begins with verifying whether the car is set up for the 29X4.75 fitment or the 4.75-20 fitment.
Condition matters just as much as measurement on an antique vehicle. Inspect the wheels for rust, cracks, bent areas, or old repairs, and make sure the bead surfaces are suitable for service. A sound tire choice can still be undermined by damaged or mismatched wheels, especially on a car from the late 1920s.
Restoration & Appearance
Which tire should I choose for a period-style 1927 Moon 60 Series?
For a period-style 1927 Moon 60 Series, the right starting point is whichever primary bias-ply size matches the car's actual wheel setup: 29X4.75 or 4.75-20. Both fitments suit the vintage character of the vehicle far better than a modern-looking substitute in an unrelated sizing system.
A restoration-minded owner should balance appearance with practicality. Confirm the wheel dimensions first, then consider how closely the tire's proportions and presentation align with the look you want. When exact historical originality matters, marque-specific references and restoration documentation are still worth consulting before making the final choice.
Does correct tire fitment matter for a 1927 Moon 60 Series restoration?
Correct tire fitment matters a great deal on a 1927 Moon 60 Series because tire size strongly affects both stance and authenticity of presentation. Using the proper bias-ply format for the wheels on the car helps preserve the visual character that belongs on a late-1920s automobile.
Fitment also affects whether the restoration functions properly on the road. A tire that does not match the wheel arrangement can create mounting problems and upset the way the car sits. Even on a show-focused vehicle, the tires should still be chosen with careful attention to wheel compatibility and safe operating condition.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1927 Moon 60 Series?
Yes, modifications can affect tire fitment on a 1927 Moon 60 Series, especially if the car has replacement wheels, earlier restoration work, brake changes, or suspension alterations. Since this model is associated with two different bias-ply tire sizes, even a long-ago change can influence which size actually belongs on the car today.
The best approach is to inspect the vehicle as it currently sits rather than assume every component is original to 1927. Wheel diameter, wheel condition, clearance around the fenders, and steering travel should all be checked before selecting tires. That is particularly important on collector cars with a long ownership and service history.
What should I inspect before driving a 1927 Moon 60 Series on new tires?
Before driving a 1927 Moon 60 Series on new tires, inspect the wheels, valve hardware, and the overall condition of the running gear. The tires should be properly mounted to the correct wheel diameter, and the car should be checked for obvious issues such as rubbing, uneven stance, or hardware that may have loosened during installation.
A short, cautious test drive is a smart next step on an antique vehicle. Recheck inflation, look for any signs of contact at full steering lock, and pay attention to how the car tracks and brakes. Collector cars that sit for long periods also deserve a broader safety review before regular road use begins.
How should tires on a collector 1927 Moon 60 Series be maintained?
Tires on a collector 1927 Moon 60 Series should be maintained with regular inspections for cracking, cuts, bulges, air loss, and uneven wear. Because antique cars are often driven infrequently, age and storage conditions can become just as important as tread depth when evaluating whether the tires remain suitable for road use.
Storage practices make a real difference over time. Keep the car away from prolonged sunlight, excess heat, moisture, and ozone sources, and verify inflation before each drive rather than assuming the tires have held pressure. Periodic checks of wheel condition and overall chassis alignment also help protect both the tires and the car.
