The 1904 Cadillac Model B comes from the brass-era years when Cadillac built its reputation on precise engineering, compact luxury, and dependable day-to-day motoring rather than sheer size. Owners preserving one today usually care as much about visual authenticity and wheel compatibility as they do basic drivability. Tire fitment centers on two antique beaded-edge bias-ply sizes, 30X3 and 30X3.5, and the first step is confirming which one belongs on the specific sub-model and wheel setup. From there, the real choice is among clincher and brass-era style offerings, tread presentation, and sidewall treatments such as blackwall, all white, or all gray. That makes careful size and rim confirmation especially important before putting a restored Model B back on the road.
Which Tire Size Is Right for The 1904 Cadillac Model B
The 1904 Cadillac Model B uses two primary tire sizes, and the right one depends on the exact sub-model and wheel setup. Both are antique diameter-by-section beaded-edge bias-ply tires, but they do not share the same rim diameter, so confirming whether the car is set up for a 23-inch or 24-inch wheel is the first step before comparing tread style, sidewall appearance, or brand.
In the 30X3.5 size, the first number refers to an approximate 30-inch overall tire diameter, while the second number indicates a 3.5-inch section width rather than wheel diameter. This is a brass-era beaded-edge bias-ply fitment used on a 23-inch rim, making wheel compatibility especially important on a restored or long-stored Model B. Available choices include Firestone, Universal Vintage Tire, Excelsior, and Coker Classic, with blackwall, all white, and all gray sidewall treatments across clincher and period-style series. It is the size to evaluate when the car carries the wider 30-inch tire profile and matching 23-inch wheel.
The 30X3 size uses the same approximate 30-inch outside diameter, but with a narrower 3.0-inch section width and a different wheel requirement. It is also a brass-era beaded-edge bias-ply tire, mounted on a 24-inch rim, so it should not be treated as interchangeable with 30X3.5 simply because the overall diameter matches. Product choices span Firestone, Coker Classic, Universal Vintage Tire, and Excelsior, with blackwall, all white, and all gray appearances plus smooth, ribbed, sawtooth, and non-skid tread styles. This size suits Model B setups that retain the narrower clincher tire and 24-inch wheel combination.
Sub-model fitment matters on the 1904 Cadillac Model B because the covered versions do not all use the same tire size. The Delivery is more straightforward, while the Standard can appear with either of the two brass-era beaded-edge sizes, making wheel confirmation especially important before ordering tires.
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1904 Cadillac Model B Delivery
The 1904 Cadillac Model B Delivery uses the 30X3.5 bias-ply size, so selection starts with that wider antique beaded-edge fitment. Tire choice then becomes a matter of clincher style, sidewall treatment, and making sure the car still carries the correct 23-inch wheel for that size.
The 1904 Cadillac Model B Standard can use either 30X3 or 30X3.5, so tire selection depends on the actual wheel and existing setup on the car. Since those two sizes use different rim diameters, a quick wheel check should come before comparing tread style, brand, or restoration-oriented 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.
Best 1904 Cadillac Model B Tires for Sale
Available 1904 Cadillac Model B tires cover both primary sizes with choices from Firestone, Coker Classic, Universal Vintage Tire, and Excelsior. Buyers can compare clincher and brass-era series, blackwall, all white, and all gray sidewalls, plus smooth, ribbed, sawtooth, and non-skid tread presentations.
Common 1904 Cadillac Model B tire questions usually come down to size identification, wheel diameter, beaded-edge fitment, restoration appearance, and what should be inspected before road use on an early brass-era car.
Tire Size & Fitment
What tire size fits a 1904 Cadillac Model B?
The 1904 Cadillac Model B uses two antique bias-ply tire sizes: 30X3 and 30X3.5. The Delivery uses 30X3.5, while the Standard can appear with either 30X3 or 30X3.5 depending on the setup on the car.
Those two sizes share a similar overall diameter but do not use the same wheel diameter, so the choice is not just a matter of tire width. A buyer should confirm the exact sub-model first, then verify whether the car has 23-inch or 24-inch clincher wheels before choosing among available brands, tread styles, and sidewall treatments.
What size rim does a 1904 Cadillac Model B use?
Rim diameter depends on the tire size fitted to the 1904 Cadillac Model B. The 30X3.5 size uses a 23-inch rim, while the 30X3 size uses a 24-inch rim.
That difference is especially important on a brass-era car because these are beaded-edge clincher-style tires, not modern metric radials. Measuring the existing wheel and confirming the tire size already on the car can prevent ordering the right-looking tire for the wrong rim, which is a common issue on restored vehicles that have changed hands over time.
Do all 1904 Cadillac Model B sub-models use the same tire size?
No. The 1904 Cadillac Model B Delivery uses 30X3.5, while the 1904 Cadillac Model B Standard can use either 30X3 or 30X3.5. Fitment is not uniform across the covered sub-models.
That means the sub-model name alone may not answer the full question on a Standard car. The safest approach is to confirm both the sub-model and the wheel diameter already on the vehicle, then choose the tire that matches that setup rather than assuming every Model B should use the same width or rim.
Choosing the Right Tire
What should I consider when choosing a 30X3 or 30X3.5 tire for a 1904 Cadillac Model B?
Start with the correct primary size and matching wheel diameter, because 30X3 and 30X3.5 are not the same fitment. After that, the main differences are brand, tread style, sidewall treatment, clincher or brass-era presentation, and in some cases load figures tied to specific products.
A restoration-focused car may call for a different look than one built mainly for display or occasional touring. Sidewall color, smooth versus non-skid tread, and period-style series can all change the finished appearance, so once size and wheel compatibility are confirmed, the right tire is usually the one that best matches the car’s intended presentation and use.
What sidewall styles are available for 1904 Cadillac Model B tires?
1904 Cadillac Model B tires are available in blackwall, all white, and all gray sidewall treatments depending on size and series. Those choices appear across both 30X3 and 30X3.5 offerings, although the exact combination varies by product.
Sidewall style has a major effect on how a brass-era car presents, especially on an open-wheel vehicle where the tires are highly visible. Once the correct size is established, compare sidewall treatment alongside tread design and series name so the finished look complements the restoration rather than simply filling the wheel with the right dimensions.
What brands offer tires for the 1904 Cadillac Model B?
Tires for the 1904 Cadillac Model B are available from Firestone, Coker Classic, Universal Vintage Tire, and Excelsior. Those brands cover the applicable 30X3 and 30X3.5 antique bias-ply fitments with several period-style series and appearance options.
Brand choice should be considered alongside the exact size, clincher-style construction details, sidewall appearance, and tread presentation rather than treated as the only decision. On a vehicle this early, the right tire is usually the one that matches the wheel setup and delivers the visual character the owner wants, whether that means a smooth white tire or a more utilitarian black non-skid look.
Restoration & Appearance
Which tire should I choose for a period-style 1904 Cadillac Model B?
A period-style 1904 Cadillac Model B tire starts with the correct beaded-edge bias-ply size for the car: 30X3 or 30X3.5, depending on sub-model and wheel diameter. From there, clincher-style offerings, brass-era tire series, and traditional tread patterns are the most relevant paths for a restoration-oriented presentation.
Appearance choices such as blackwall, all white, or all gray can significantly change the car’s visual balance, especially on a brass-era vehicle with exposed wheels. If exact originality matters beyond general period style, compare the tire choice against marque-club guidance or period reference material before settling on a specific sidewall and tread treatment.
Does correct tire fitment matter for a 1904 Cadillac Model B restoration?
Yes, correct tire fitment matters a great deal on a 1904 Cadillac Model B restoration because the car uses antique clincher-style sizes tied to specific wheel diameters. A 30X3 setup uses a 24-inch rim, while a 30X3.5 setup uses a 23-inch rim.
Getting that relationship right affects both the vehicle’s appearance and the basic compatibility of tire to wheel. Even when two sizes look close in overall diameter, the wrong rim match can undermine the restoration and complicate safe road use, so verifying the wheels already on the car should happen before cosmetic choices are made.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1904 Cadillac Model B?
Yes. Any changes to wheels, hubs, suspension height, body clearance, or steering components can affect tire fitment on a 1904 Cadillac Model B. That is especially true here because the car uses narrow brass-era clincher tires in two sizes that also require different rim diameters.
A Model B that has been restored long ago, re-wheeled, or adapted for parade use may not still match its original tire setup. Before choosing tires, inspect the actual wheel diameter and width on the car, then check clearance at full steering lock and through suspension movement so the selected size suits the current configuration.
What should I inspect before driving a 1904 Cadillac Model B on new tires?
Before driving a 1904 Cadillac Model B on new tires, inspect the wheels for condition and correct diameter, make sure the tires are seated properly, and confirm there is no interference at the fenders, steering linkage, or suspension. Basic checks for inflation, valve condition, and secure mounting also matter.
An early brass-era car often spends long periods parked, so it is wise to inspect the rest of the running gear at the same time. Brake function, wheel bearing condition, spoke integrity if applicable, and any signs of looseness should be addressed before road use, especially on a car moving onto fresh beaded-edge tires.
How should 30X3 and 30X3.5 tires on a collector 1904 Cadillac Model B be maintained?
Collector-car tires in 30X3 and 30X3.5 should be checked regularly for pressure retention, sidewall cracking, cuts, tread separation, and signs of age-related hardening. Even when the car sees light use, early-size bias-ply tires still need routine inspection because storage time can be just as important as mileage.
Keeping the Model B out of prolonged sunlight, heat, moisture, and ozone sources can help preserve tire condition between drives. It also helps to move the car occasionally or store it in a way that avoids long-term flat spotting, then perform a full visual check before any tour or extended outing.
