1959 Cadillac 62 Series Tires

The 1959 Cadillac 62 Series uses two primary tire sizes: 800-15 and 820-15. Both are vintage numeric bias-ply sizes designed for 15-inch rims, so the car is not limited to one single factory-style size presentation across every setup covered here.

The practical next step is to check what is already on the car, including the wheel diameter and the tire size stamped on the sidewall. Once that is confirmed, the choice becomes much easier because you can focus on the correct size first, then narrow the selection by whitewall style, brand, tire series, or a radial equivalent if a construction change is being considered.

The primary tire sizes for the 1959 Cadillac 62 Series are built for a 15-inch rim. That applies to both 800-15 and 820-15, so the wheel diameter stays consistent even though the car may use either of the two bias-ply tire sizes.

Rim diameter is only part of the fitment picture, so it still helps to confirm wheel width before choosing among available tires. Many of the standard bias-ply options in these sizes are built around 6.00 to 6.50 inch rim widths, while some specialty 820-15 products call for wider wheels, making wheel verification worthwhile before final selection.

The 820-15 code is a vintage numeric bias-ply size. The 8.20 figure refers to the tire’s nominal section width in inches, and the 15 indicates the rim diameter, so it is a classic full-size American car sizing format rather than a modern metric radial designation.

Understanding that format helps when comparing products because the size itself does not tell you sidewall style, series, or intended character. An 820-15 for a 1959 Cadillac 62 Series may appear as a blackwall, narrow whitewall, or wide whitewall, and it may also have radial-equivalent alternatives that keep the same 15-inch rim diameter but still need wheel and clearance checks.

On the 1959 Cadillac 62 Series, 800-15 is a primary bias-ply tire size. It belongs to the vintage numeric bias-ply system and is one of the original-style fitment formats associated with large American cars of this period.

That matters because a buyer choosing 800-15 can either stay with traditional bias-ply construction for period-style appearance and feel or consider a radial equivalent separately. A radial option should be treated as an alternative rather than the same thing in a different casing, so wheel width, overall tire dimensions, and clearance should be reviewed before making the switch.

For 800-15, radial equivalents include 225R15, P235/75R15, P235/70R15, and 800R15. For 820-15, the radial equivalents are 235R15, P235/75R15, P255/70R15, and 820R15, covering 80-series metric, 75-series P-metric, 70-series P-metric, and bias-look radial formats.

Those choices give the 1959 Cadillac 62 Series owner several ways to move from a bias-ply fitment toward a radial while staying on a 15-inch wheel. The recommended rim-width range for these equivalents is 6 to 8 inches, but a sensible conversion still includes checking actual wheel width, tire-to-body clearance, and the car’s present suspension and steering setup.

A bias-look radial is available for both primary sizes on the 1959 Cadillac 62 Series. The bias-look radial equivalents are 800R15 for 800-15 and 820R15 for 820-15, giving the car a radial alternative that aims to retain a more traditional visual presentation.

This type of option is especially useful when the goal is to stay close to a vintage tire appearance without using a true bias-ply construction. Even so, the change should still be approached as a fitment decision rather than an automatic substitute, with attention paid to wheel width, overall dimensions, and clearance at the fenders and steering components.

Start with the correct primary size, since the 1959 Cadillac 62 Series uses either 800-15 or 820-15, both on 15-inch rims. After size is confirmed, the main decision points are construction type, sidewall style, brand, tire series, and whether the car is being kept close to a period-style presentation or driven with a radial alternative in mind.

Appearance is a major part of the choice on a 1959 Cadillac because a wide whitewall creates a very different look from a blackwall or narrow whitewall. It also helps to compare wheel-width compatibility and load figures where given, especially if the car has replacement wheels or if the selection includes specialty products outside the more traditional touring-style bias-ply range.

The 1959 Cadillac 62 Series has several sidewall treatments available across its primary sizes, including blackwall, narrow whitewall, and wide whitewall options. That range is especially broad in 820-15, where multiple brands offer different whitewall widths and blackwall alternatives.

Sidewall style affects the car’s visual character as much as the tire size itself, particularly on a fin-era Cadillac where the tire is a large part of the overall presentation. A wide whitewall usually supports a more formal late-1950s look, while blackwall reads more restrained, so the right choice depends on whether the car is being restored, customized, or simply kept roadworthy.

Tires for the 1959 Cadillac 62 Series are available from Coker Classic, BFGoodrich, Firestone, US Royal, Universal Vintage Tire, and Avon. Those brands appear across the two primary bias-ply sizes, with the widest variety concentrated in 820-15.

Brand is only one part of the comparison, so it helps to look at each tire’s series, sidewall treatment, construction, and wheel-width compatibility at the same time. A buyer selecting for restoration appearance may focus on whitewall width and visual style first, while someone evaluating a more specialized 820-15 option should pay closer attention to rim-width and intended-use differences.

A period-style 1959 Cadillac 62 Series usually starts with one of its primary bias-ply sizes, 800-15 or 820-15, rather than jumping straight to a modern metric radial. Within those sizes, the strongest visual cues come from the sidewall treatment, particularly the available wide whitewall options that suit the car’s late-1950s proportions and styling themes.

The right choice depends on how closely the car is being restored and what look the owner wants from the finished stance. When exact originality matters, it is wise to compare the selected tire against marque references, restoration photos, and vehicle-specific historical documentation so the size and whitewall presentation both support the car’s intended character.

Tire construction changes more than ride feel on a restored 1959 Cadillac 62 Series; it also affects the visual shape of the tire and the way the car sits on its wheels. A bias-ply tire typically preserves the traditional vintage sizing format, while a radial alternative may change the presentation even when chosen as an equivalent.

That is why many restoration-minded owners decide on appearance first and construction second. A true bias-ply setup usually supports the most traditional look, while a bias-look radial can offer a compromise for someone who wants a more classic sidewall presentation without staying strictly with bias-ply construction.

Yes, modifications can affect tire fitment on a 1959 Cadillac 62 Series even when the nominal tire size remains 800-15 or 820-15. Changes such as aftermarket wheels, altered wheel width, suspension work, lowering, or body and brake updates can influence how much room the tire has at the fender, inner wheelhouse, and steering components.

A car that looks stock may still have fitment differences from its original setup, so checking the actual wheel dimensions matters before replacing tires. It also helps to inspect turning clearance and suspension travel, particularly when considering a radial equivalent or a specialty 820-15 tire that may be intended for a wider rim than a standard restoration-style bias-ply option.

Before putting a 1959 Cadillac 62 Series back on the road with new tires, inspect the wheels, valve stems, lug hardware, and the condition of the brake and suspension components around the tire area. Tire pressure should be set correctly for the chosen tire, and the tires should be checked for proper seating, even clearance, and any signs of air loss after installation.

A collector car that has spent long periods parked deserves an especially careful walk-around after the first few miles. Recheck pressure, look for contact marks inside the wheel openings, and pay attention to pull, vibration, or unusual steering behavior, since those signs can point to wheel issues, alignment needs, or a fitment mismatch that should be corrected early.

Collector-car tires in 800-15 or 820-15 sizes should be kept clean, properly inflated, and inspected regularly for cracking, flat spotting, cuts, bulges, and uneven wear. Because many 1959 Cadillac 62 Series cars see limited seasonal use, tire age and long-term storage conditions can matter just as much as visible tread depth.

Storage away from prolonged sunlight, moisture, and ozone sources helps preserve both the rubber and the appearance of whitewall sidewalls. It is also smart to check pressure before each drive rather than assuming a low-use car is ready to go, since slow air loss and age-related deterioration are easy to miss on a collector vehicle that spends more time parked than driven.