1928 Cadillac Tire Fitment Guide

1928 Cadillac vehicles covered here use two tire sizes: 32X7.00 and 700-20. Both sizes apply to the 1928 Cadillac 8 Cyl., and both are bias-ply fitments built around a 20-inch rim diameter. For 700-20, listed products fit rim widths ranging from 3.75 to 5.50 inches depending on the specific tire, so wheel width needs to be matched to the exact product rather than assumed across the whole size.

That means a 1928 Cadillac owner should start by confirming the size already on the car or the size specified for that particular wheel setup. Once the size is identified, the next choice is usually visual and restoration-oriented, since whitewall treatment, blackwall appearance, and brand line can change the car's finished look even when the wheel diameter stays the same.

A 32X7.00 tire on a 1928 Cadillac uses an older antique diameter-by-section format. The first number, 32, refers to the overall tire diameter in inches, while 7.00 is the nominal section width. It is a bias-ply style size associated with the late-1920s era, when many luxury and premium cars still used tall, narrow tire proportions that emphasized ride height and formal stance.

Modern buyers often mistake the first number for wheel diameter, but on this older format it refers to the tire's overall height instead. If your Cadillac is fitted for 32X7.00, it is important to stay with that exact style of sizing unless a trusted marque expert has already established an accepted interchange for your car and wheel combination.

A 700-20 tire on a 1928 Cadillac is a numeric bias-ply size. The 7.00 figure is the nominal section width in inches, and the 20 is the wheel diameter in inches. This format became common on American cars and luxury cars of the period, and it remains easy to shop today because reproduction bias-ply tires are still offered in several sidewall treatments.

For a Cadillac owner, 700-20 usually means an easier path if you want a choice of blackwall, wide whitewall, or double-whitewall appearance. It is still important to match the tire to the actual wheel width and intended presentation of the car, because two tires with the same size code can be aimed at slightly different restoration looks.

The right choice for a 1928 Cadillac depends first on which size belongs on your specific car and wheel setup, because both 32X7.00 and 700-20 are period bias-ply options for the 8 Cyl. model. Since there is no radial-versus-bias decision here, the comparison is really between two authentic vintage sizing conventions that share a 20-inch wheel diameter but can represent different original fitment paths.

Owners pursuing an accurate restoration usually start with factory literature, surviving tires, wheel markings, or marque-club guidance to pin down the correct size before worrying about brand or sidewall style. If your car is already known to use 700-20, that size offers a broader visible product selection, while 32X7.00 appeals to buyers preserving an earlier style of late-1920s tire notation and appearance.

1928 Cadillac tires in 700-20 are offered in Blackwall, Wide Whitewall, and Double-Whitewall styles. Firestone offerings include wide whitewall and double-whitewall versions, while BFGoodrich appears in both wide whitewall and blackwall form. Those sidewall treatments can change the car's visual character dramatically, especially on a large pre-war luxury car where the tire sidewall is a major part of the overall profile.

A blackwall usually suits a more restrained or driver-oriented presentation, while wide whitewall and double-whitewall designs create a more formal, upscale period look many collectors associate with premium American cars of the late 1920s. The best choice depends on the style of restoration you are after and how your particular Cadillac is being presented at shows or on tours.

Firestone and BFGoodrich both make tires for 1928 Cadillac vehicles in the 700-20 size. Firestone appears in the Balloon line, while BFGoodrich appears in the Silvertown Classic Bias Ply line. Both names carry strong historical resonance in the American collector market, which matters to owners who want their Cadillac to wear a brand that feels visually and culturally at home on a late-1920s luxury car.

Brand choice on a 1928 Cadillac is often as much about restoration taste as mechanical fitment, since sidewall styling and the character of the product line can shape the finished look. Once the correct size is established, compare the available brand's sidewall treatment, rim-width compatibility, and load rating to narrow the field in a way that suits your car's intended use.

1928 Cadillac tires in the 700-20 size use different rim-width ranges depending on the specific tire. Firestone 700-20 products listed here fit 3.75- to 4.00-inch rims, while BFGoodrich 700-20 products fit 5.00- to 5.50-inch rims. That is a meaningful difference, because the size code alone does not guarantee that every 700-20 tire is intended for the same wheel width.

A buyer should verify the actual wheel width before choosing among 700-20 products, especially on a car that may have been restored, re-wheeled, or altered decades ago. Matching the tire to the wheel correctly helps preserve the intended profile and avoids setup issues that come from selecting by appearance alone.

Inner-tube status for 1928 Cadillac tires should be confirmed on the specific tire you choose. The listed 700-20 products do not include tube-type or tubeless markings in the size field, so tube use should be treated as a product-specific setup decision rather than assumed from the size code alone. On late-1920s wheels, many owners and restorers expect a traditional tube-compatible arrangement because of the era of the car and wheel design.

The practical step is to match the tire, wheel, flap needs if applicable, and valve hardware as one system rather than treating the tire by itself. If your Cadillac is still on original-style wheels, confirm the complete setup before mounting so the finished installation is appropriate for both safety and authenticity.

The original-style 1928 Cadillac wheels can potentially work with both listed tire sizes because 32X7.00 and 700-20 are both tied to a 20-inch wheel diameter. That said, wheel diameter compatibility is only part of the picture. The exact rim width still matters, and the listed 700-20 products alone already show more than one acceptable rim-width range depending on brand and construction details.

If your goal is to keep the original wheels, confirm the wheel width and the size the car is meant to run before choosing between the two tire formats. That approach preserves fit, keeps the proportions correct, and helps avoid forcing a period-looking tire onto a wheel that is not the right match for that particular product.

A 1928 Cadillac should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment. Bias-ply tires are especially prone to flat-spotting during long static storage, so maintaining proper inflation and moving the car periodically helps reduce distortion in the carcass and sidewall.

Collectors who store a 1928 Cadillac for extended periods often either roll the car occasionally or support it in a way that reduces prolonged load on one contact patch. The goal is not just preserving tread, but protecting the tall sidewalls and vintage construction so the car drives smoothly and still presents well when it comes back out for tour or show use.

Tires on a 1928 Cadillac should be judged more by age, storage history, and condition than by mileage. Collector-car tires often age out before they wear out, so a careful evaluation around five to seven years is wise, and many owners treat the ten-year point as a serious replacement threshold regardless of remaining tread depth. The DOT date code on the tire is the starting point for understanding its age.

A low-mileage pre-war Cadillac can still be riding on tires that look respectable from a few feet away but have hardened rubber, sidewall checking, or weakened internal structure. Reviewing age along with visible condition gives a much better safety picture than tread depth alone, especially on a heavy luxury car that places real demand on its tires.

Tires on a 1928 Cadillac should be inspected before every drive and again before any longer outing or tour event. Look for sidewall cracking, cuts, bulges, irregular wear, embedded debris, and signs of pressure loss. On a car of this age, it is also smart to examine valve stems and the spare, since a spare that has aged in place for decades may be no more serviceable than the tires on the ground.

Frequent inspection matters because collector cars often sit for long periods between drives, and that storage pattern can hide age-related issues until the car is back at speed. A quick walk-around before each outing is one of the simplest ways to catch a problem early and avoid spoiling a drive with a preventable tire failure.

The 1928 Cadillac 8 Cyl. would have been fitted in the bias-ply era, and both 32X7.00 and 700-20 align with period-correct construction for a late-1920s Cadillac. Original fitment could vary by body style, wheel equipment, and market practice, so the most important point is that a proper restoration should stay within the correct vintage size family and bias-ply construction rather than shifting to a later radial format.

If originality matters, use factory literature, surviving car evidence, and Cadillac marque-club guidance to confirm which of the two sizes belongs on your specific automobile. Once the size is settled, sidewall style becomes the finishing choice that helps the car read either as a more formal luxury restoration or as a more restrained touring presentation.

Correct tire fitment matters on a 1928 Cadillac because judges and knowledgeable enthusiasts notice size, construction type, and sidewall presentation very quickly on a pre-war luxury car. A tire that is the wrong size family, mounted in a profile that does not suit the wheel, or styled with a sidewall treatment that clashes with the restoration can stand out even if the rest of the car is finished to a high standard.

For show purposes, the safest route is to confirm the right bias-ply size first and then select a sidewall style that fits the car's intended character and the event's judging culture. Marque clubs and event rule books remain the best tie-breakers when there is debate over whether a blackwall, wide whitewall, or more decorative whitewall treatment is most appropriate.

For the 1928 Cadillac in 700-20, Firestone Balloon and BFGoodrich Silvertown Classic Bias Ply differ in sidewall offerings, rim-width compatibility, weight, and rated load-and-pressure figures. Firestone appears in wide whitewall and double-whitewall versions for 3.75- to 4.00-inch rims, with listed weights of 35 and 39 pounds and a 1930-pound load rating at 40 psi. BFGoodrich appears in wide whitewall and blackwall versions for 5.00- to 5.50-inch rims, with listed weights of 36 and 40 pounds and load ratings of 1700 pounds at 36 psi or 1980 pounds at 42 psi.

Those differences mean the decision is not simply about brand name. A 1928 Cadillac owner should compare the actual wheel width on the car, then choose the sidewall appearance and load specification that fit the intended setup. On a visible, high-sidewall pre-war tire, the cosmetic effect can be just as important as the underlying dimensions.

1928 Cadillac tires can be suitable for highway use when they are the correct size, properly mounted, in good condition, and used within the limits of both the tire and the car. The listed 700-20 products here do not show speed-rating letters, so the safer approach is to think in terms of sound condition, correct inflation, and realistic speeds for a late-1920s luxury automobile rather than chasing modern highway expectations.

On a 1928 Cadillac, braking ability, steering response, suspension condition, and overall chassis health usually matter as much as the tire itself once normal touring speeds are involved. A careful pre-drive inspection and an honest assessment of the car's mechanical readiness are more important than assuming any reproduction pre-war tire should be treated like a modern high-speed radial.

Inflation pressure for 1928 Cadillac tires should follow the specific tire's rating and the car's factory guidance rather than a one-pressure-fits-all rule. In 700-20, listed products include ratings of 1930 pounds at 40 psi, 1980 pounds at 42 psi, and 1700 pounds at 36 psi depending on the tire. Those figures show that pressure recommendations can differ even within the same nominal size.

Use the original owner's manual or accepted marque reference for the vehicle baseline, then compare that with the tire maker's rated pressure for the exact product you select. Do not transfer a pressure figure from one 700-20 tire to another without checking, because brand and casing differences can change the proper setup.

Before taking a 1928 Cadillac on a longer drive, inspect each tire for cracking, cuts, bulges, uneven wear, and proper cold inflation. Check the valve stems, confirm the spare is usable, and make sure the tire sidewalls are free from weathering severe enough to raise concern. On a large pre-war car, it is also wise to verify that all wheels are secure and that the tires have not developed storage-related flat spots.

Tire readiness is only one part of the pre-trip routine on a 1928 Cadillac, but it is one of the easiest areas to review thoroughly before departure. A car of this era deserves a full mechanical check alongside the tire inspection so that brakes, cooling, fuel, and chassis systems are ready for the same distance you expect the tires to cover.