1964 Oldsmobile Cutlass Tires

A 1964 Oldsmobile Cutlass uses three primary bias-ply tire sizes: 670-15, 700-14, and 750-14. The correct one depends on the wheel setup on the car, because 670-15 mounts on a 15-inch rim while 700-14 and 750-14 mount on 14-inch rims.

That makes wheel confirmation the first job before choosing any tire. Once rim diameter is settled, the next decisions are whether the car should keep a traditional bias-ply construction, which sidewall style suits the build, and whether a radial equivalent is worth comparing for the exact size being used.

A 1964 Oldsmobile Cutlass can use either a 15-inch rim or a 14-inch rim, depending on which primary tire size is on the car. The 670-15 size uses a 15-inch rim, while the 700-14 and 750-14 sizes use a 14-inch rim.

Rim diameter should be checked at the wheel itself rather than assumed from the model name alone. After that, compare the tire's rim-width requirements with the wheels on the car, especially if they may have been changed over the years or if the car is being returned to a more period-style appearance.

The 670-15 size is a vintage numeric bias-ply designation. In that format, 6.70 refers to the tire's nominal section-width class and 15 refers to the wheel diameter, so it is a 15-inch bias-ply fitment rather than a modern metric radial size.

That matters because a 670-15 should be evaluated as an older sizing system with its own wheel and appearance considerations. Owners comparing it to modern radial alternatives should use the equivalent sizes meant for 670-15 specifically, then verify wheel width, overall fit, and clearance before making a construction change.

On a 1964 Oldsmobile Cutlass, 670-15 is a primary bias-ply tire size. It uses the vintage numeric sizing system and belongs to the car's original-era style of fitment rather than to a modern metric or P-metric radial format.

That means a 670-15 choice is usually tied to maintaining a traditional look and construction. A radial equivalent can still be considered, but the comparison should start with the proper 670-15 equivalent sizes and include wheel-width compatibility, physical clearance, and the overall character you want the Cutlass to have on the road.

For 670-15, radial equivalents include 195R15, P205/75R15, P215/70R15, and 670R15 as a bias-look radial. For 700-14, the equivalents are 185R14, P195/75R14, and P205/70R14. For 750-14, the equivalents are 195R14, P205/75R14, P215/70R14, and 750R14 as a bias-look radial.

Those options give the Cutlass owner several ways to compare vintage sizing with modern radial formats, from tall 80-series metric types to lower-profile 70-series P-metric alternatives. Each one still needs to be checked against the wheel on the car, because rim width, overall dimensions, and vehicle clearance all matter before treating any equivalent as a workable alternative.

Start by matching the radial equivalent to the specific primary size on the car, whether that is 670-15, 700-14, or 750-14. Then confirm the wheel diameter, compare the recommended rim-width range for that equivalent, and make sure the tire's dimensions suit the Cutlass without assuming all wheel and suspension combinations are the same.

A construction change can also alter the car's overall feel and visual presentation, especially on a mid-1960s A-body. Clearance at the fenders and steering range deserves a close look, and any car with replacement wheels, suspension changes, or prior body work should be checked carefully before moving from a bias-ply fitment to a radial alternative.

The first consideration is the correct primary size for the wheel on the car: 670-15, 700-14, or 750-14. After that, the main factors are staying with bias-ply construction or comparing a radial equivalent, selecting a sidewall style that matches the build, and reviewing rim-width compatibility for the specific tire.

Product choice also depends on how the Cutlass will be used. A restoration-minded owner may focus on a traditional blackwall, whitewall, or redline presentation, while a driver may spend more time comparing equivalent sizes and wheel fit. The best approach is to settle fitment first, then narrow the field by appearance and tire series.

Sidewall choices for 1964 Oldsmobile Cutlass tires include blackwall, narrow whitewall, wide whitewall, and redline, depending on the size. The greatest variety appears in 670-15 and 750-14, while 700-14 is available in a more limited blackwall and narrow whitewall range.

That gives the Cutlass owner room to shape the car's appearance without changing the primary tire size. Blackwalls tend to keep the look understated, whitewalls move it toward a more formal or traditional presentation, and redline in 750-14 offers a sportier period-style option. Sidewall choice should follow the wheel size already confirmed on the car.

Brands available across 1964 Oldsmobile Cutlass tire sizes include Firestone, BFGoodrich, US Royal, Goodyear, Coker Classic, Universal Vintage Tire, Excelsior, Avon, and STA. The exact brand mix depends on the tire size, with 670-15 offering the broadest spread and the 14-inch sizes using a narrower group.

Brand choice is only one part of the decision. It still makes sense to compare each tire by size, sidewall treatment, tire series, and wheel compatibility, because the same Cutlass can appear very different depending on whether it wears blackwalls, whitewalls, or redlines and whether it sits on 14-inch or 15-inch wheels.

A period-style 1964 Oldsmobile Cutlass usually starts with one of its primary bias-ply sizes: 670-15, 700-14, or 750-14, matched to the wheel diameter actually on the car. From there, the decision often comes down to whether the build calls for blackwall, narrow whitewall, wide whitewall, or, in some 750-14 choices, redline styling.

The most convincing vintage look usually comes from keeping the correct size format and construction style aligned with the car's era. When exact originality matters, it helps to compare the car against marque references, historical photos, or restoration records, then choose the tire presentation that supports that specific Cutlass rather than a generic 1960s look.

Correct tire fitment matters a great deal on a 1964 Oldsmobile Cutlass restoration because the tire influences stance, wheel-to-fender proportion, and overall visual character. Using the proper primary size family for the wheel diameter on the car keeps the restoration anchored in the right era, whether the car wears 14-inch or 15-inch wheels.

Appearance is only part of the equation. The wrong rim diameter or an ill-matched substitute can complicate clearance and change how the car sits, so restoration planning should include wheel measurement as well as tire selection. Choosing the right sidewall style afterward helps refine the finished look without disturbing the underlying fitment.

Yes, modifications can affect tire fitment on a 1964 Oldsmobile Cutlass. Aftermarket wheels, changes in wheel width, different offsets, lowered suspension, replacement springs, or body and brake changes can all alter how a 670-15, 700-14, or 750-14 tire sits in the wheel opening.

That is why the tire size alone should never be treated as the whole story on a modified car. A Cutlass with non-original wheels or suspension should be checked for steering clearance, fender clearance, and wheel compatibility before any tire is mounted, especially when changing from one primary size family or construction type to another.

Before driving a 1964 Oldsmobile Cutlass on new tires, inspect wheel condition, confirm the correct rim diameter, and make sure the tires are inflated properly for the application being used. It is also wise to check for any contact issues at full steering lock and to confirm that lug hardware and wheel mounting surfaces are in good condition.

A collector-era car deserves a broader once-over before road use. Look at suspension wear, alignment behavior, and any signs that the car has uneven ride height or prior rubbing. After the first miles, recheck air pressure and inspect the sidewalls and tread to be sure the tire is seating and running cleanly on the Cutlass.

1964 Oldsmobile Cutlass tires should be maintained with regular pressure checks, visual inspections, and careful storage habits if the car is driven only occasionally. Bias-ply collector tires should be watched for cracking, cuts, bulges, irregular tread wear, and slow air loss, especially after long periods of sitting.

Storage conditions matter as much as mileage on an older collector car. Keeping the Cutlass away from prolonged heat, direct sunlight, excess moisture, and ozone sources can help protect the tire's condition over time. Any tire that shows age-related deterioration or repeated pressure loss should be inspected closely before the car returns to regular road use.