1964 Oldsmobile F85 Tires

A 1964 Oldsmobile F85 uses one of four primary bias-ply tire sizes: 6.50-14, 670-15, 700-14, or 750-14. The correct size depends on the exact sub-model and wheel setup. The 6 Cyl. coverage includes 6.50-14, 670-15, and 700-14, while the 8 Cyl. coverage includes 700-14 and 750-14.

That means the first step is not choosing a brand or sidewall style, but confirming the exact version of the car and whether it has 14-inch or 15-inch wheels. Many F85s may also have had wheel changes over the years, so the tire on the car now should not be treated as proof without checking the actual rim diameter and overall setup.

The 1964 Oldsmobile F85 uses both 14-inch and 15-inch rim diameters, depending on the tire size fitted to the car. Sizes 6.50-14, 700-14, and 750-14 mount on 14-inch rims, while 670-15 mounts on a 15-inch rim.

Because the F85 has more than one wheel diameter in its fitment range, measuring the wheel on the car is an important part of tire selection. A buyer looking at 670-15 products, for example, needs a true 15-inch wheel, while the 14-inch sizes are not interchangeable with that setup simply because they may look close in overall proportions.

The 1964 Oldsmobile F85 has more than one tire size because fitment varies across the covered sub-models and wheel applications. The six-cylinder coverage includes 6.50-14, 670-15, and 700-14, while the eight-cylinder coverage uses 700-14 or 750-14. Rim diameter also changes, since one fitment uses 15-inch wheels and the others use 14-inch wheels.

That variation means the right tire cannot be chosen by year and model name alone. Identifying the exact sub-model helps narrow the correct size, but the actual wheel on the car still needs to be confirmed, especially on a collector vehicle that may have been restored, modified, or converted to a different wheel and tire combination at some point.

For the 1964 Oldsmobile F85, 670-15 is a primary bias-ply tire size. It is part of the original-style fitment group for this model and mounts on a 15-inch rim rather than the 14-inch wheels used by the other primary sizes.

A radial alternative can still be considered, but that does not change the fact that 670-15 itself is a bias-ply designation. Buyers deciding between traditional bias-ply construction and a radial equivalent should compare wheel width, vehicle clearance, and the intended use of the car, especially if the goal is to balance period-style appearance with regular road driving.

Radial equivalents for 670-15 include 195R15 as an 80-series metric radial, P205/75R15 as a 75-series P-metric radial, P215/70R15 as a 70-series P-metric radial, and 670R15 as a bias-look radial. The associated recommended rim-width range for these equivalents is 5 to 7 inches.

Those options give the 1964 Oldsmobile F85 owner several ways to move from a vintage numeric bias-ply size into a radial format. Even so, an equivalent should be treated as an alternative rather than an automatic swap, so the actual wheel width, tire clearance, and overall vehicle setup still deserve a careful check before making the change.

A bias-look radial is available for some 1964 Oldsmobile F85 fitments. The 670-15 size has a 670R15 bias-look radial equivalent, and the 750-14 size has a 750R14 bias-look radial equivalent. Those options are intended to provide a more traditional visual presentation while using radial construction.

That makes a bias-look radial especially appealing when the goal is to preserve a vintage stance without staying strictly with bias-ply construction. The same fitment checks still apply, particularly wheel width, wheel diameter, and tire clearance, because a bias-look radial remains a radial alternative and should not be assumed to match every existing wheel or suspension setup.

Choosing a 670-15 tire for a 1964 Oldsmobile F85 starts with confirming that the car actually uses the 15-inch wheel required for that size. From there, the main variables are brand, sidewall style, tire series, rim-width compatibility, and whether the goal is a traditional bias-ply tire or a radial-equivalent alternative.

This size offers unusually broad variety, including blackwall, narrow whitewall, and wide whitewall choices from Firestone, US Royal, BFGoodrich, Goodyear, Coker Classic, Universal Vintage Tire, and others. That makes 670-15 a selection question as much as a fitment question, so appearance preference and wheel specification deserve just as much attention as the size itself.

Available sidewall styles for 1964 Oldsmobile F85 tires include blackwall, narrow whitewall, wide whitewall, and redline, depending on the tire size. The broadest variety appears in 670-15 and 750-14, while 700-14 is limited to blackwall and narrow whitewall options.

Sidewall style matters because it changes the car’s visual character even when the tire size stays the same. A blackwall gives a plainer, more understated look, while whitewall or redline treatment pushes the car toward a more distinct period-style presentation. The right choice is usually tied to the desired appearance theme and the exact size already confirmed for the car.

Tires for the 1964 Oldsmobile F85 are available from BFGoodrich, Firestone, US Royal, Goodyear, Coker Classic, Universal Vintage Tire, Excelsior, Avon, and STA, depending on size. Brand choice varies quite a bit by fitment, with 670-15 offering the deepest selection and 700-14 being much narrower.

That means the right brand choice begins with the correct tire size rather than the other way around. Once the fitment is confirmed, it becomes easier to compare series, sidewall treatment, and wheel-width suitability within the brands that actually serve that size, rather than trying to force a preferred brand into a size the car may not use.

A period-style 1964 Oldsmobile F85 restoration starts with the correct primary bias-ply size for the specific sub-model and wheel diameter. From there, the choice usually comes down to the visual treatment that suits the car, such as blackwall, narrow whitewall, wide whitewall, or, in 750-14, redline.

Bias-ply construction keeps the presentation closest to the F85’s original era, which is why many restoration-oriented buyers begin there. Exact originality can vary by how the individual car was delivered, so buyers pursuing a highly accurate restoration should compare tire details against marque references, period photos, and vehicle-specific documentation before settling on a sidewall style.

Tire construction changes the look of a restored 1964 Oldsmobile F85 as much as the driving feel. A bias-ply tire gives the car a more traditional sixties presentation because the sizing format, proportions, and sidewall choices align more closely with the period fitments used on this model.

A radial equivalent can still be attractive, especially in a bias-look radial where available, but it serves a slightly different restoration goal. Owners aiming for a road-ready vintage appearance may consider that route, while owners focused on maintaining the character of the original tire format usually stay with the correct bias-ply size and an era-appropriate sidewall treatment.

Modifications can absolutely affect tire fitment on a 1964 Oldsmobile F85. Aftermarket wheels, changes in wheel width, altered offset, suspension work, lowering, or body modifications can all change how a 6.50-14, 670-15, 700-14, or 750-14 tire sits in the car.

That is especially important on an F85 because the covered fitments already include both 14-inch and 15-inch wheel diameters. A car that no longer has its original wheel setup may need more than a simple year-make-model match, so steering clearance, fender clearance, and actual wheel dimensions should be verified before choosing either a bias-ply tire or a radial equivalent.

Before driving a 1964 Oldsmobile F85 on new tires, inspect the wheels for the correct diameter and sound condition, then confirm proper mounting and inflation. It is also wise to look over the suspension, steering components, and alignment, since worn parts can make a freshly mounted tire feel or wear poorly.

A quick clearance check is important too, especially if the car has 15-inch wheels, wider tires, or older suspension parts that allow extra movement. After the first miles, recheck tire pressure and look for any signs of rubbing, uneven wear, or air loss so the new tires can settle into service without a preventable fitment issue.

Tires on a 1964 Oldsmobile F85 should be maintained with regular pressure checks, visual inspections, and attention to age-related condition. Even on a collector car that sees limited mileage, sidewall cracking, flat spotting, cuts, bulges, and slow air loss matter just as much as tread depth.

Storage conditions also play a role, since prolonged sunlight, heat, moisture, and ozone exposure can shorten tire life on a hobby vehicle. A car that sits for extended periods benefits from routine inspection before every drive, and a longer trip calls for another look at pressure, visible damage, and any signs that the tire or wheel setup has changed since the last outing.