1958 Cadillac Tire Fitment Guide

1958 Cadillac vehicles use three numeric bias-ply sizes: 800-15, 820-15, and 890-15. The 60 Series and 62 Series can use 800-15 or 820-15, the 75 Series and Eldorado use 820-15, and the 86 Series uses 890-15. All three sizes mount on 15-inch wheels. The listed rim width range is 6.00 to 6.50 inches for 800-15 and 820-15, while the listed Firestone 890-15 products use a 6.50- to 7.00-inch rim width range.

That makes model identification the first step on a 1958 Cadillac, especially if you own a 60 Series or 62 Series where both 800-15 and 820-15 appear. Once the model is confirmed, compare the wheel itself against the tire's approved rim width range and decide whether you want a blackwall, narrow whitewall, or wide whitewall appearance. Buyers working with specialty-bodied or commercial Cadillac applications should be especially careful with 890-15 because it is not shared across the broader passenger-car lineup.

On a 1958 Cadillac, 800-15 is a numeric bias-ply size. The 800 portion refers to the tire's nominal section width in vintage numeric sizing, and the 15 identifies the wheel diameter in inches. It is not a modern metric code, and it does not describe the tire the way a later P-metric or Euro-metric radial size would. For 1958 Cadillac applications, 800-15 appears on the 60 Series and 62 Series.

Knowing that code helps keep a buyer from substituting a later-style size that may change the car's look or fitment. For a 1958 Cadillac owner, 800-15 points you toward a true period-style bias-ply tire on a 15-inch wheel, with the currently listed products centered on wide whitewall presentation. If your car is a 60 Series or 62 Series, that code also tells you there may be another valid size to compare before making a final choice.

No, 1958 Cadillac models do not all use the same tire size. The 60 Series and 62 Series can use either 800-15 or 820-15, the 75 Series and Eldorado use 820-15, and the 86 Series uses 890-15. Every size in the lineup is a 15-inch bias-ply fitment, but the width code changes by model and application. That difference is important because the size choice is tied to the specific Cadillac model family, not just the model year.

A buyer who only knows '1958 Cadillac' is still one step short of the right tire. The quickest way to narrow it down is to confirm whether the car is a 60 Series, 62 Series, 75 Series, 86 Series, or Eldorado, then compare the wheel and the current tire markings if they are still present. Owners of 60 Series and 62 Series cars should be prepared to compare two valid vintage sizes rather than assuming the whole Cadillac range shared one standard fitment.

For a 1958 Cadillac, the choice between 800-15 and 820-15 is only relevant if you have a 60 Series or 62 Series, because those are the models that use both sizes. Both are 15-inch bias-ply tires, so the decision is not about switching from bias-ply to radial construction. Instead, it is about using the size that matches your specific application and the visual stance you want within correct period-style fitment. The 75 Series and Eldorado stay with 820-15, while the 86 Series uses 890-15.

If you are restoring a 60 Series or 62 Series and want the tire to look right on the car, compare the existing wheel and the tire size currently on the car before choosing. The listed 800-15 and 820-15 products share a 15-inch diameter and the same 6.00- to 6.50-inch rim width range, which simplifies wheel compatibility, but it does not make the sizes interchangeable for every application. When originality matters, checking with a Cadillac marque specialist can help settle the final choice.

1958 Cadillac tires are available in several period-appropriate sidewall styles depending on size. The 800-15 offerings are wide whitewalls, the 820-15 range includes blackwall, narrow whitewall, and wide whitewall choices, and the 890-15 products include wide whitewall and blackwall versions. That gives Cadillac owners room to match the presentation of a formal luxury car, a more understated commercial-bodied application, or a late-1950s show-style look that emphasizes whitewall presence.

Sidewall style has a major effect on how a 1958 Cadillac reads visually, especially on cars with large body sides and dramatic trim. A wide whitewall usually delivers the most unmistakably period-correct luxury appearance for passenger-car Cadillacs of this era, while blackwall can suit a different presentation or a specialized application. If the car is being restored for judged events, confirm the expected sidewall treatment with the rules used by the specific club or show rather than assuming every 1958 Cadillac was presented the same way.

Several brands currently cover 1958 Cadillac fitments. Coker Classic appears in 800-15, BFGoodrich, Firestone, and US Royal appear in 820-15, and Firestone plus Avon appear in 890-15. All of the listed options remain within the vintage-style bias-ply category, but they differ in sidewall presentation and, in the case of 890-15, speed-rating details. That means brand choice on a 1958 Cadillac is often tied as much to the look of the tire as to the size itself.

The practical way to narrow the field is to start with the correct size for your model and then compare brands within that size. A 60 Series or 62 Series owner may look at Coker Classic in 800-15 or multiple brands in 820-15, while an 86 Series owner is shopping a much smaller 890-15 pool. If your goal is a very specific restoration style, brand and sidewall combination may matter almost as much as the size code stamped on the sidewall.

The listed 1958 Cadillac 800-15 and 820-15 tires use a rim width range of 6.00 to 6.50 inches. The listed Firestone 890-15 tires use a wider 6.50- to 7.00-inch range. All of the sizes mount on 15-inch wheels, but rim width is still an important part of the fitment picture because the larger size is associated with a broader wheel range than the smaller passenger-car sizes.

Before choosing a tire for a 1958 Cadillac, measure the actual wheel or confirm its dimensions if the car has already been restored or modified. Matching the tire to the correct rim width helps preserve the intended profile and keeps the sidewall from being pinched or over-spread. That is especially useful for 60 Series and 62 Series cars, where two different 15-inch sizes are possible, and for 86 Series applications, where the wider 890-15 fitment deserves extra attention.

The listed 1958 Cadillac products do not carry tube-type or tubeless markers in a uniform way across the lineup, so tube fitment should be confirmed product by product rather than assumed at the year-make level. That matters most on a vintage car because wheel design, wheel condition, and the exact tire selected all influence whether a tube is appropriate. Since every listed 1958 Cadillac size is a period-style bias-ply fitment, treating tube requirements as a detail to verify before installation is the safest approach.

A restorer should inspect the wheel as carefully as the tire. Older wheels with age, pitting, or other sealing concerns may need a different setup than a freshly restored wheel, and a bias-ply reproduction tire should always be matched to the manufacturer's specific guidance. When in doubt, confirm the tire's sidewall marking and the wheel's intended use before mounting, especially if the car will be driven more than occasionally or carried as a judged restoration.

Every listed 1958 Cadillac tire size uses a 15-inch wheel, so the original wheel diameter is shared across the lineup. That said, shared diameter does not automatically mean every 15-inch Cadillac wheel should be used with every size. The listed rim width range for 800-15 and 820-15 is 6.00 to 6.50 inches, while the listed Firestone 890-15 products call for 6.50 to 7.00 inches, which creates a meaningful distinction between the common passenger-car sizes and the larger 86 Series fitment.

For most owners, that means an original 60 Series, 62 Series, 75 Series, or Eldorado wheel should first be checked against the size being considered, even though the bead seat diameter is the same. The 86 Series deserves even closer confirmation because its tire size stands apart from the rest of the 1958 Cadillac range. Diameter compatibility is only the starting point; wheel width and the exact model application still need to line up before mounting a tire.

A stored 1958 Cadillac should be kept out of direct sunlight, away from ozone sources such as electric motors and battery chargers, and in a space that stays dry and temperature-stable. Bias-ply tires are especially prone to flat-spotting when a heavy car sits in one place for long periods, and a 1958 Cadillac is exactly the kind of large, low-use collector car where that can show up. Clean floors, proper inflation, and periodic rolling of the car all help reduce stress on the tire carcass.

If the car will sit for months at a time, moving it occasionally or using stands correctly can help preserve the tire shape, though the suspension and frame should be supported thoughtfully rather than lifted haphazardly. Whitewall tires also benefit from careful storage because staining and discoloration can become part of the cosmetic restoration burden later. A little storage discipline goes a long way on a fin-era Cadillac where the tires contribute so much to the overall presentation.

On a 1958 Cadillac, tire age usually matters more than tread wear because most surviving cars are driven sparingly. A good collector-car rule is to begin evaluating tires closely once they are five to seven years old and to treat around ten years as a serious replacement point regardless of remaining tread. The DOT date code, overall sidewall condition, and how the car has been stored are usually more revealing than mileage on a vintage luxury car.

That approach is especially sensible for a 1958 Cadillac because these cars are heavy, often used for occasional longer drives, and may spend long periods parked between outings. A tire can look visually acceptable yet still have age-related hardening, internal deterioration, or whitewall cosmetic decline. If there is any doubt about age or condition, replacing the tire before the next touring season is often the smarter move than trying to stretch service life on a low-mileage collector car.

Tires on a 1958 Cadillac should be inspected before every drive and again before any longer road trip or show weekend. Look for sidewall cracking, weather checking around the whitewall edges, uneven tread wear, cuts, bulges, and signs that the tire is losing air. Pressure retention matters on a heavy late-1950s Cadillac, and the spare should be inspected too because it may be decades old even if it has never touched the road.

A quick walkaround is often enough to catch a problem before it becomes a roadside issue. If the car uses a setup that requires tubes, include the condition of the valve stems and any signs of slow leakage in your routine. Owners who only drive their 1958 Cadillac occasionally sometimes skip inspections because the car sees little mileage, but age and storage conditions can create problems just as easily as road use can.

A 1958 Cadillac 62 Series would originally have been associated with bias-ply tire fitment, not modern radial construction. Within the current 1958 Cadillac size range, the 62 Series is tied to 800-15 and 820-15, both of which are bias-ply sizes and therefore align with the period construction type buyers expect on a late-1950s Cadillac. Original-equipment brand choice could vary by production practices and market expectations, so the most reliable way to pin down a highly specific restoration target is to verify against marque resources and surviving car evidence.

For most restorations, getting the construction type, size family, and sidewall style right will matter more than chasing an assumed universal brand. A wide whitewall usually gives a 1958 Cadillac the visual presence enthusiasts expect, but judged standards can differ depending on the event and the exact body style. If you are preparing a car for concours-level review, consult Cadillac club references and period photography before making the final call between 800-15 and 820-15.

Correct tire fitment absolutely matters when showing a 1958 Cadillac because judges and knowledgeable enthusiasts notice size, construction, and sidewall treatment immediately. A car from this era is expected to wear bias-ply tires in the proper vintage sizing family, and an obviously incorrect size or sidewall presentation can distract from an otherwise well-restored car. On a late-1950s Cadillac, tires are a major part of the stance and visual balance, so they influence authenticity more than many owners realize.

That does not mean every event uses identical judging standards, but it does mean tire choice should be intentional. A wide whitewall may be the right look for one 1958 Cadillac restoration, while another application may call for a different presentation within the same year. If the car is headed to marque judging, confirm what that club expects for the exact model and body style before mounting tires, since event-specific rules can be stricter than general enthusiast assumptions.

For 1958 Cadillac 86 Series applications using 890-15, the listed Firestone and Avon choices differ in both appearance and rated details. Firestone is offered as a wide whitewall in 3.00-inch and 5.00-inch versions with a listed maximum load capacity of 2500 at 40 psi and a 6.50- to 7.00-inch rim width range. Avon appears as the Turbospeed in blackwall form with an S speed rating, which carries a 112 mph ceiling, and a listed maximum load figure of 2,337 pounds.

That means the decision is not just about brand name. Firestone leans toward the classic wide-white visual character many collectors want on a 1950s luxury or specialty-bodied vehicle, while Avon presents a more understated blackwall look and adds an explicit speed rating to the sidewall information. If originality of appearance matters most, the whitewall Firestones may be the more natural direction; if the specific blackwall presentation suits the vehicle better, the Avon becomes the key comparison point.

1958 Cadillac tires can be appropriate for highway use when they are the correct size, in sound condition, and operated within their stated limits. The 890-15 Avon option carries an S speed rating, which means a 112 mph ceiling, while the other listed 1958 Cadillac tires are vintage-style bias-ply products without a speed letter shown here. In real use, the condition of a 1958 Cadillac's brakes, steering, suspension, and alignment often matters just as much as the tire itself, especially on a large, heavy car designed in the late 1950s.

Highway safety on a collector Cadillac starts with matching the tire to the model and then being realistic about the car's age and dynamics. Fresh, properly inflated bias-ply tires can serve well for normal cruising, but they will not behave exactly like modern radials in lane changes, tracking, or road feel. If the car is newly acquired or freshly restored, a cautious shakedown at local speeds is a smart step before committing to longer highway miles.

The listed maximum pressure figures for 1958 Cadillac tires vary by size and product. The 800-15 products are listed at 1800 pounds maximum load at 32 psi, the 820-15 products are listed at 1920 pounds maximum load at 32 psi, and the Firestone 890-15 products are listed at 2500 pounds maximum load at 40 psi. Those are tire ratings, not blanket factory inflation instructions for every 1958 Cadillac model, so they should not be transferred from one size to another.

The best practice is to use the original Cadillac owner's literature or trusted factory reference for the car's recommended operating pressure, then compare that with the tire manufacturer's maximum rating for the exact reproduction tire you are using. A heavy 75 Series or a specialized 86 Series should never be assumed to want the same pressure as a different Cadillac model simply because all of them use 15-inch wheels. Correct inflation begins with the exact size and exact product on the car.

Before a longer drive in a 1958 Cadillac, inspect each tire for cracking, cuts, bulges, irregular wear, and proper inflation, and do not forget the spare. On whitewall tires, also look closely at the sidewall itself because cosmetic aging can sometimes reveal deeper storage-related deterioration. Since model-specific sizing matters on this year, make sure the car is actually wearing the correct size for its model family rather than simply whatever 15-inch tire fit the wheel at some point in its past.

Tires are only one part of the checklist on a car of this age, but they are the part in direct contact with the road. After the tires are confirmed, look over the valve stems, verify that the car tracks and brakes evenly, and make sure the jack and spare arrangement are usable. A 1958 Cadillac is a wonderful road car when properly prepared, yet its comfort and confidence on the highway depend heavily on doing the small pre-drive checks that modern daily drivers often let you ignore.