1966 Saab Tire Fitment Guide

Two sizes fit 1966 Saab vehicles: 155R15 and 560-15. The 155R15 radial is used on both the 1966 Saab 750 & 850 GT and the 1966 Saab 96, while the 560-15 bias-ply is used on the 1966 Saab 96. Both sizes mount on 15-inch rims, and rim-width guidance in the available products spans 4.00 to 5.50 inches for 155R15 and 4.5 to 5.50 inches for 560-15, depending on the specific tire.

That means year and make alone are not always enough to choose correctly for a 1966 Saab. If you own a 750 & 850 GT, the path is straightforward because 155R15 is the fitment in this range. If you own a Saab 96, you need to decide whether you are matching a radial setup or a bias-ply setup before moving on to brand, sidewall style, or tube details.

On a 1966 Saab, 155R15 is a metric radial size. The 155 refers to nominal section width in millimeters, the R identifies radial construction, and the 15 is the wheel diameter in inches. In this older European format, the aspect ratio is not printed, and the convention is an 80-series profile.

That decoding matters because 155R15 is the shared size across both 1966 Saab models covered here. It also comes with some product-level variation: Michelin offers T- and H-rated versions, and tube type can be either TT or TL depending on the tire. Checking the full sidewall marking on the specific tire keeps you from assuming every 155R15 is built the same way.

No, not all 1966 Saab models use the same tire size. The 1966 Saab 750 & 850 GT uses 155R15, while the 1966 Saab 96 can use either 155R15 or 560-15. The shared point is wheel diameter, since both sizes are built for 15-inch rims, but the construction and appearance differ significantly between the radial and bias-ply options.

For a buyer, that means identifying the model is the first step and identifying the intended character of the car is the second. A Saab 96 owner may be comparing two legitimate directions, while a 750 & 850 GT owner is narrowing within the 155R15 family. Once the model is confirmed, the choice becomes much easier and avoids mixing up model-specific fitment with year-make-wide fitment.

For a 1966 Saab, the answer depends first on the model and then on the type of driving experience you want. The 155R15 radial fits both the 750 & 850 GT and the Saab 96, while the 560-15 bias-ply applies to the Saab 96 only. Radials generally appeal to owners who want a more familiar modern-driving feel, while bias-ply tires are usually chosen to preserve a more period-correct look and road feel on a restoration.

If your car is a 750 & 850 GT, 155R15 is the relevant size to focus on. If your car is a Saab 96, think about how the car will be used: show-oriented restoration, casual touring, or a blend of both. That framing usually settles the size and construction question before you start comparing brands, whitewall style, or tube versus tubeless details.

1966 Saab tires are available in more than one sidewall style, and the options depend on size. The 155R15 radial comes in blackwall form, which suits the restrained European look most buyers expect on a Saab of this era. The 560-15 bias-ply for the Saab 96 is available in narrow whitewall and wide whitewall versions from Firestone and US Royal.

That sidewall difference matters most for Saab 96 owners choosing between a restoration look and a more understated driver presentation. Blackwall is the simpler choice if you want the car to read as a compact European sedan with clean, functional styling. Whitewall widths can shift the visual character of the car, so they are worth choosing deliberately rather than treating them as a minor cosmetic detail.

Three brands cover 1966 Saab fitments here: Firestone, Michelin, and US Royal. Firestone and Michelin offer the 155R15 radial size, while Firestone and US Royal cover the 560-15 bias-ply size for the Saab 96. Within those sizes, the available choices also separate by series and sidewall treatment rather than by brand name alone.

That gives 1966 Saab owners a mix of approaches. A buyer looking at 155R15 can compare Firestone and Michelin within the radial category, while a Saab 96 owner considering 560-15 can focus on Firestone versus US Royal and then narrow by narrow whitewall or wide whitewall appearance. Brand matters, but on a car like this, construction type and sidewall look often shape the final decision just as much.

Rim-width guidance for 1966 Saab tires varies by size and by product. In 155R15, the supported rim-width range runs from 4.00 to 5.50 inches on products that publish that information. In 560-15, some tires specify a 4.5-inch rim, while others allow a 4.50 to 5.50-inch range.

The practical takeaway is to match the tire to the actual wheel on your car rather than assuming every 15-inch Saab wheel will suit every reproduction tire equally well. This matters most when comparing one 560-15 product to another or when moving between radial and bias-ply construction. A quick measurement of wheel width before ordering prevents a correct diameter from turning into an avoidable setup problem.

Inner-tube requirements on 1966 Saab tires depend on the exact product. In 155R15, tube status varies by product: Michelin X appears as TL, Michelin XAS appears as TT, and Michelin XAS-FF appears as TL, while Firestone F560 does not add a tube marker in the size line. The 560-15 bias-ply products shown here do not carry TT or TL markers in the size line.

That means tube fitment should be confirmed at the product level rather than assumed from the size alone, especially in 155R15. Wheel condition and wheel design also matter, particularly on older collector cars that may still use original rims. If you are trying to keep a 1966 Saab close to a specific restoration standard, confirming the tire's own sidewall marking is the safest way to avoid surprises.

A 1966 Saab can use both tire sizes on 15-inch wheel diameter where the model allows it, because both 155R15 and 560-15 are built for 15-inch rims. That applies especially to the Saab 96, which appears with both sizes. Rim-width suitability still depends on the specific tire, with published ranges covering 4.00 to 5.50 inches in 155R15 and 4.5 to 5.50 inches in 560-15.

For Saab 96 owners, that makes wheel diameter less of a hurdle than wheel width and intended tire type. A wheel that accepts one 15-inch size may not automatically be ideal for every product in the other size. Treat original wheels as a starting point, then confirm actual wheel width and the tire manufacturer's recommended range before finalizing the setup.

A 1966 Saab should be stored away from direct sunlight, standing moisture, and ozone-producing equipment such as electric motors, battery chargers, or welders. Keep the tires clean, properly inflated, and out of prolonged contact with petroleum products or solvents. Bias-ply tires such as 560-15 are generally more prone to flat-spotting during long static storage, while any older-style collector tire can suffer sidewall weathering if it sits in poor conditions.

For a car that spends long stretches parked, periodic movement helps prevent one section of the tread from carrying the load month after month. If the car will be down for an extended season, some owners rotate its position or support the chassis to reduce sustained loading. Good storage habits do as much for tire life on a collector Saab as careful driving does.

On a 1966 Saab, tire age matters more than mileage in most collector use. A sensible rule is to evaluate tires closely once they are about five to seven years old and to treat roughly ten years as a serious replacement point regardless of remaining tread. The DOT date code, along with visible condition, gives a much better picture of service life than odometer miles on a hobby car.

That is especially important on vintage cars that may look fine because they are driven sparingly and stored indoors. Rubber can harden, crack, or lose flexibility long before the tread appears worn out. If your 1966 Saab still wears older tires with acceptable-looking tread, age should still be part of the decision before any long trip or regular road use.

Tires on a 1966 Saab should be inspected before every drive and again before any longer outing or event. Look for sidewall cracking, cuts, bulges, unusual wear, and pressure loss, and check that the tread is free from damage or embedded debris. If your chosen tire setup uses tube-type construction, valve stems and any slow loss of air deserve extra attention as part of the inspection routine.

Routine inspection is one of the easiest ways to catch age-related issues before they become roadside problems. A collector Saab may go weeks between drives, and that sitting time can hide pressure loss or the first signs of weathering. Making tire inspection part of your startup ritual keeps the car safer and protects the condition of hard-to-replace vintage-style tires.

For a 1966 Saab Saab 96, the period-correct original style would generally be bias-ply, which aligns with the 560-15 size offered for that model. The Saab 96 also appears with 155R15 radial fitment, reflecting the period when European cars were increasingly associated with radial development and use. If you are restoring a specific market version or trying to match a factory-delivery appearance, the model's history and destination market can influence which direction is most appropriate.

That is why authenticity decisions on a 1966 Saab 96 often go beyond size alone. Construction type, sidewall treatment, and the visual stance of the tire all affect how correct the car looks. For a strict restoration, it is wise to verify details through Saab marque clubs, period brochures, or surviving original-car references before settling on a final tire specification.

Correct tire fitment absolutely matters when showing a 1966 Saab, especially in judged classes that emphasize originality. Size, construction type, and sidewall style all influence whether the car presents as era-appropriate. A radial where bias-ply appearance is expected, or an incorrect whitewall treatment on a compact European Saab, can stand out even if the tire physically fits the car.

That does not mean every show car must wear the same tire, because event standards vary. Some venues are relaxed about safety-minded radial substitutions, while concours-oriented judging can be much stricter about period appearance. If your 1966 Saab is being prepared for formal judging, confirm the event's rules and compare your choice against marque-club guidance rather than relying on appearance alone.

For a 1966 Saab in 155R15, Michelin X and Michelin XAS differ in sidewall marking, speed rating, and tube designation. Michelin X appears as 155R15 82T TL, while Michelin XAS appears as 155HR15 82H TT. That means the Michelin X carries a T rating with a 118 mph ceiling and tubeless marking, while the Michelin XAS carries an H rating with a 130 mph ceiling and tube-type marking.

Those differences make them more than just two versions of the same-size tire. A buyer comparing them should think about intended use, wheel setup, and how closely the tire's construction details match the goal for the car. On a 1966 Saab, that may matter as much for restoration direction and wheel compatibility as it does for the simple question of size.

1966 Saab tires can be suitable for highway driving when the tire's condition, construction, and speed rating match the way the car is being used. In 155R15, Michelin X carries a T rating with a 118 mph ceiling, while Michelin XAS and XAS-FF carry H ratings with a 130 mph ceiling. The 560-15 bias-ply choices do not show speed ratings here, and bias-ply tires generally call for a more vintage driving mindset than modern radials do.

On a 1966 Saab, the car's own braking, suspension, and overall mechanical condition are often just as important as the tire's rating during normal highway use. Safe cruising depends on the full package working together, not just the tread. Before sustained road driving, make sure the tires are age-sound, correctly inflated, and appropriate for the model and the kind of driving you actually plan to do.

Inflation pressure for a 1966 Saab should be matched to the exact tire size and product, not guessed from another tire in the same diameter. Among the available choices, 155R15 Firestone F560 shows a maximum load of 1045 pounds at 44 psi, while the 560-15 bias-ply products show 970 pounds at 32 psi. Those figures describe the tire's rated load-and-pressure relationship, not necessarily the pressure your Saab should run in regular service.

For actual vehicle use, start with the factory guidance in the owner's manual or period service literature and then compare it with the reproduction tire manufacturer's recommendations for that exact tire. Do not transfer a 560-15 pressure to a 155R15, or vice versa, simply because both fit 15-inch rims. Correct pressure is one of the biggest influences on wear, steering feel, and tire life.

Before a longer drive in a 1966 Saab, inspect each tire for cracking, cuts, bulges, irregular wear, and proper inflation. Check valve stems, and if your tire setup uses tube-type construction, make sure the stems and any signs of slow leakage are addressed before departure. The spare should be inspected too, since a vintage spare that has aged out may not be useful when you actually need it.

Tires are only one part of the pre-trip check on a car of this age, so pair that inspection with a broader look at brakes, wheel bearings, steering, fluids, and lights. A Saab that is driven occasionally can hide age-related issues even if it starts and idles well. A careful once-over before departure makes the trip more enjoyable and reduces the chance of a small tire issue becoming a roadside interruption.