1957 Saab 92 & 93 Tires

The 1957 Saab 92 & 93 uses two primary tire sizes: 145R15 in radial construction and 5.20-15 in bias-ply construction. Both sizes are associated with the same vehicle and both use a 15-inch rim, so the fitment question is less about wheel diameter and more about which construction type best matches the car and its intended use.

That means the next step is confirming the wheel setup on the car today, especially if it has been restored or modified over the years. A Saab still wearing a traditional-style setup may suit the 5.20-15 bias-ply path, while a car being driven more regularly may lead an owner toward the 145R15 radial format.

The tire sizes used on the 1957 Saab 92 & 93 are built around a 15-inch rim diameter. Both the 145R15 radial size and the 5.20-15 bias-ply size share that same wheel diameter, which keeps the basic wheel-size question simple even though the car can run two different tire constructions.

Rim diameter is only one part of fitment, so it is worth checking wheel width before choosing among available tires. Some 145R15 radial products are intended for relatively narrow rims, and that can matter on a small European car where wheel changes, replacement rims, or long-ago modifications may have altered the original setup.

Yes. The 1957 Saab 92 & 93 Base uses the same two primary tire-size options as the model core: 145R15 in radial construction and 5.20-15 in bias-ply construction. There is no separate tire-size split here by sub-model, so the decision stays centered on construction type and the style of tire you want on the car.

That makes the Base model easier to shop for, but it still helps to inspect the actual wheels before ordering tires. A restored Saab may have replacement rims, and the right choice depends on keeping the 15-inch diameter while also matching the tire to wheel width, road use, and the appearance you want the car to carry.

Start with the two correct primary fitments: 5.20-15 if you want a bias-ply setup, or 145R15 if you want a radial setup on the same 15-inch rim diameter. From there, the important considerations are wheel width, intended road use, construction preference, and whether the car is being kept closer to a period-style presentation or driven more often.

A radial choice may also involve comparing product details such as rim-width range, sidewall style, weight, and load capacity where those figures are stated. On an older Saab, that kind of comparison matters because small cars are sensitive to tire dimensions and wheel compatibility, especially after decades of repairs, restorations, or wheel substitutions.

Within the available 145R15 radial options, sidewall styles include blackwall and wide whitewall. Blackwall choices appear in Firestone F560 Radial and Michelin XZX offerings, while BFGoodrich Silvertown Radial is available with a 1.875-inch whitewall. Those options give the Saab a noticeably different visual character even while staying within the same radial tire size.

Choosing between sidewall styles comes down to the look you want the car to project. A blackwall usually gives a simpler European presentation, while a whitewall creates a more decorative vintage look. Since sidewall style changes appearance without changing the basic 145R15 fitment, it is one of the easiest ways to tailor the car visually.

The available 145R15 radial choices for the 1957 Saab 92 & 93 come from Firestone, Michelin, and BFGoodrich. Those brands appear in several tire series, including Firestone F560 Radial, Michelin XZX, and BFGoodrich Silvertown Radial. Each gives the owner a different mix of appearance and specification detail while staying in the correct radial size format.

Brand choice should still come after the basics of fitment and construction. Once the tire size and wheel dimensions are confirmed, compare the sidewall style, rim-width compatibility, and any stated load information that matters to how the car will be used. That approach keeps the decision grounded in fitment rather than badge preference alone.

For a period-style 1957 Saab 92 & 93, the 5.20-15 bias-ply size is the most traditional starting point because it reflects an older numeric bias-ply format used on 15-inch wheels. The 145R15 radial size can also suit a vintage car, but it represents a more modern radial path rather than the earlier bias-ply look and construction.

The right choice depends on whether the goal is visual authenticity in a broad historical sense or more road-friendly driving behavior. Owners pursuing exact restoration standards should compare their car against marque references, period photos, and build-era documentation, then make sure the selected tire also matches the actual wheel dimensions on the vehicle.

Tire construction changes more than driving feel on a restored 1957 Saab 92 & 93; it also influences the car’s visual attitude. A 5.20-15 bias-ply tire tends to support a more traditional mid-century presentation, while a 145R15 radial gives the car a later-style radial look even though it remains within the same 15-inch wheel diameter.

Sidewall treatment adds another layer to that decision. Blackwall radial options keep the look restrained, while a wide whitewall creates a more decorative vintage effect. Because restoration goals vary, it helps to decide early whether the priority is period-style construction, a certain sidewall appearance, or a balance between vintage character and regular road use.

Yes. Even though the 1957 Saab 92 & 93 uses 15-inch tire sizes, modifications can change how well a tire works on the car. Aftermarket wheels, altered wheel width, suspension repairs, ride-height changes, or bodywork can all affect clearance and how a 145R15 radial or 5.20-15 bias-ply tire sits within the wheel opening.

A careful check of the actual wheel and chassis setup is worthwhile before settling on either construction. Look at steering clearance, fender space, and how close the tire runs to suspension components. Small vintage cars can be especially sensitive to dimensional changes, so the safer approach is to confirm the current setup rather than assume every surviving car is unchanged.

Before regular road use, inspect the wheels for correct diameter and condition, make sure the tires seat properly, and verify that there is no rubbing at full steering lock or during suspension movement. It also helps to check valve stems, inflation pressure, lug hardware, and the general condition of suspension and steering parts on the 1957 Saab 92 & 93.

An older collector car should also be looked over for issues that a fresh set of tires will not solve, such as worn bushings, loose wheel bearings, or alignment problems. A short test drive followed by a second inspection can reveal contact marks, air loss, or handling concerns before the car is taken on longer outings.

Collector-car tires on a 1957 Saab 92 & 93 should be maintained with regular pressure checks, visual inspections, and attention to age-related deterioration. Look for sidewall cracking, bulges, cuts, uneven tread wear, and any gradual air loss. Those checks matter whether the car is running a traditional 5.20-15 bias-ply tire or a 145R15 radial.

Storage conditions are just as important as mileage on a low-use Saab. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tires between drives. Even a car that sees only occasional use should have its tires inspected before road trips, since time and storage can age a tire long before the tread wears out.