The 1930 Marquette 6 Cyl. comes from a short-lived companion-make era, giving it a distinct place among early Depression-era American cars. Owners of these cars usually approach tires with two goals in mind: keeping the car visually appropriate to its period and making sure the fitment matches the actual wheel setup on the vehicle today. For the 1930 Marquette 6 Cyl., the primary fitments are bias-ply sizes 28X5.25 and 5.25-18. Those two sizes reflect different sizing systems, so the key decision is confirming which wheel and tire specification the car is using before choosing a period-style replacement for restoration display or road use.
Which Tire Size Is Right for The 1930 Marquette 6 Cyl.
The 1930 Marquette 6 Cyl. uses two primary tire sizes, and the first step is confirming which one matches the wheels on the car. Both fitments are bias-ply, but they use different sizing systems and different rim diameters, so wheel identification matters before selecting a replacement for appearance, restoration character, or road use.
The 28X5.25 size uses an older diameter-by-section format in which the first number refers to the tire's approximate overall diameter and the second refers to its nominal section width. This is a bias-ply fitment with early-era character, and it suits buyers trying to preserve the look and stance expected on a 1930 vehicle. Because this format is very different from later numeric sizing, the important next step is confirming that the car is actually using the wheel diameter associated with this specification before moving ahead with a replacement.
The 5.25-18 size is a vintage numeric bias-ply designation in which 5.25 represents the nominal section width and 18 identifies the rim diameter in inches. On a 1930 Marquette 6 Cyl., this fitment points to a more familiar later antique sizing convention while still retaining proper prewar bias-ply construction. For a restoration-minded owner, this size keeps the decision centered on wheel compatibility first, then on selecting a tire that supports the car's period-style appearance and intended driving use without assuming interchangeability with the alternate size.
Sub-model fitment is straightforward here because the covered Marquette 6 Cyl. configuration uses the same two primary tire sizes. Even so, the real check is the wheel and tire setup on the car, since these sizes use different sizing conventions and different rim diameters.
1
1930 Marquette 6 Cyl. Base
The 1930 Marquette 6 Cyl. Base uses the same two bias-ply tire sizes found across this fitment page: 28X5.25 and 5.25-18. Tire selection therefore depends less on trim identification and more on confirming which wheel diameter and vintage sizing system the car is actually wearing before choosing a period-style replacement.
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 FAQs focus on the exact tire sizes used on the 1930 Marquette 6 Cyl., how the two fitments differ, and what to inspect before choosing tires for restoration display or vintage road use.
Tire Size & Fitment
What tire size fits a 1930 Marquette 6 Cyl.?
The 1930 Marquette 6 Cyl. uses two primary bias-ply tire sizes: 28X5.25 and 5.25-18. Those are both correct fitment paths for this vehicle, but they are not the same size written two different ways. They represent different sizing systems and different wheel diameters.
That means the first job is identifying what is actually on the car before choosing a replacement. Check the wheel diameter, confirm the tire markings if any older tire is still present, and make sure the wheel and tire combination matches the vehicle's current setup. Many collector cars have had wheels changed over time, so the size on the car matters more than assumptions.
What size rim does a 1930 Marquette 6 Cyl. use?
The 1930 Marquette 6 Cyl. appears with two rim diameters tied to its tire fitments: 5.0 inches with 28X5.25 and 18 inches with 5.25-18. Since those diameters are very different, the wheel size has to be confirmed before selecting tires.
A buyer should not choose by tire appearance alone on a car of this age. Measure the wheel, verify the existing rim diameter, and inspect whether the car still carries its long-standing wheel setup or a later change. Once the wheel diameter is confirmed, the correct tire size becomes much easier to narrow down without risking an expensive mismatch.
Does the 1930 Marquette 6 Cyl. Base use the same tire size?
Yes. The 1930 Marquette 6 Cyl. Base uses the same two primary bias-ply tire sizes associated with this vehicle: 28X5.25 and 5.25-18. The fitment question is not really about a trim-level change, but about which wheel and tire specification the particular car is using.
That makes inspection especially important on a restoration or survivor car. A Base model may still wear one of the original-style fitment paths, or it may have been altered many years ago. Verifying the actual wheel diameter and reading any remaining tire markings will keep the replacement process focused on the tire that matches the car, not just the model name.
Choosing the Right Tire
What should I consider when choosing a 28X5.25 or 5.25-18 tire for a 1930 Marquette 6 Cyl.?
Start with the car's actual wheel diameter and the tire size already fitted to it. The 1930 Marquette 6 Cyl. uses two bias-ply fitments, 28X5.25 and 5.25-18, and they belong to different sizing systems. Choosing correctly begins with matching the tire to the wheel, not selecting whichever size looks closest.
After size confirmation, think about how the car will be used and presented. A restoration-focused owner may prioritize a traditional period-style look, while a road-use owner may focus more on condition, load suitability, and overall compatibility with the existing wheels. On an early vehicle, preserving proper proportions and confirming physical clearance are both just as important as reading the sidewall size.
How do I choose between the available tires for a 1930 Marquette 6 Cyl.?
The first decision is not between brands or appearance treatments, but between the two fitment paths used on the 1930 Marquette 6 Cyl. Once the wheel diameter is confirmed, the correct size narrows to either 28X5.25 or 5.25-18, both in bias-ply construction suited to the car's era.
From there, the better choice depends on the goal for the car. Some owners want a tire that supports a more restoration-oriented presentation, while others are preparing the car for occasional driving and want to focus on condition, proper mounting, and compatibility with the existing wheels. Keeping the size and wheel match correct should come before any cosmetic preference.
What rim-fitment details should matter when choosing 1930 Marquette 6 Cyl. tires?
Rim diameter is the most important detail because this Marquette uses two fitments with different wheel sizes. A 28X5.25 tire corresponds to one wheel specification, while 5.25-18 belongs to an 18-inch rim. On an antique vehicle, that difference is fundamental rather than minor.
It also helps to inspect the wheel's condition, bead area, and overall straightness before mounting new tires. Early cars may have wheels that were repaired, changed, or stored for long periods. A careful check of the wheels, along with the current tire markings and basic clearance around fenders and steering components, helps avoid choosing a tire that only seems correct at first glance.
Restoration & Appearance
Which tire should I choose for a period-style 1930 Marquette 6 Cyl.?
A period-style starting point for a 1930 Marquette 6 Cyl. is one of its proper bias-ply fitments, either 28X5.25 or 5.25-18, depending on the wheels on the car. Bias-ply construction matches the visual and historical character expected on an early 1930 American automobile.
The key is matching the tire to the actual wheel diameter and the presentation goal for the car. Restoration buyers often want the tire to support the vehicle's stance and era-appropriate look as much as its basic fitment. When exact originality matters beyond size and construction, marque-specific references and restoration documentation are worth checking before making the final choice.
Does correct tire fitment matter for a 1930 Marquette 6 Cyl. restoration?
Yes, correct tire fitment matters a great deal on a 1930 Marquette 6 Cyl. because tire size strongly affects the car's visual balance, ride height impression, and overall period presentation. With two different fitment paths in play, using the wrong size can make an otherwise careful restoration look noticeably off.
Proper fitment also helps avoid practical problems during assembly and road preparation. A tire that does not match the wheel diameter is an obvious issue, but even an incorrect vintage sizing choice can create unwanted changes in appearance and clearance. On an early collector car, tire selection is part of the restoration result, not just a maintenance purchase.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1930 Marquette 6 Cyl.?
Yes. Any change to wheels, suspension, ride height, or brake components can affect tire fitment on a 1930 Marquette 6 Cyl. That matters even more here because the vehicle uses two very different fitment paths, 28X5.25 and 5.25-18, with different rim diameters.
A Marquette that has been updated over the years should be inspected as it sits today rather than treated as untouched. Wheel measurements, tire markings, steering clearance, and fender space all deserve attention before replacement. On antique vehicles, long-ago modifications are common, and a careful physical check is often the only reliable way to confirm the correct tire choice.
What should I inspect before driving a 1930 Marquette 6 Cyl. on new tires?
Before road use, inspect the wheels, valve hardware, mounting condition, and the tire's seated position on each rim. On a 1930 Marquette 6 Cyl., it also makes sense to verify that the chosen size truly matches the wheel diameter and that there is no rubbing at full steering travel.
A broader safety check should include tire pressure, visible cuts or bulges, and the condition of suspension and steering components that affect how the tire carries the car. Early collector vehicles often sit for long periods, so it is smart to look beyond the tire itself. A short, cautious test drive can help confirm that everything tracks and clears as expected.
How should tires on a collector 1930 Marquette 6 Cyl. be maintained?
Tires on a collector 1930 Marquette 6 Cyl. should be inspected regularly for cracking, flat spotting, air loss, and signs of age-related deterioration, even if the car is driven only occasionally. Bias-ply tires on low-use antique vehicles can look acceptable at a glance while still needing closer attention.
Storage conditions matter almost as much as mileage. Keep the car away from prolonged sunlight, excess heat, moisture, and ozone sources, and check inflation before each outing rather than assuming the tires held pressure during storage. Regular visual checks, gentle cleaning, and prompt attention to any sidewall or tread change help preserve both appearance and roadworthiness.
