1959 Porsche Tire Fitment Guide

1959 Porsche vehicles use four sizes, all on 15-inch rims, but the fitment is split by model. The 1959 Porsche 356 A uses 155R15 in radial form or 560-15 in bias-ply form. The 1959 Porsche Carrera uses 165R15 in radial form or 590-15 in bias-ply form. Rim width guidance varies by tire: 155R15 commonly fits 4.00 to 5.50 inches, 560-15 runs from 4.5 inches to 4.50-5.50 inches depending on brand, 165R15 fits 4.50 to 6.00 inches, and 590-15 fits 4.00 to 4.50 inches where rim-width guidance is stated.

That means year and make alone are not enough for a 1959 Porsche tire decision. Start by confirming whether the car is a 356 A or a Carrera, then match the tire size to the wheel width actually on the car. Once that is settled, the next choice is construction type: radial for a more modern road-going feel, or bias-ply for an older-style presentation and driving character that better matches a period-correct restoration.

On a 1959 Porsche, 155R15 is a metric radial size. The 155 refers to a nominal section width of 155 millimeters, the R identifies radial construction, and the 15 is the rim diameter in inches. In this older Euro-metric convention, the aspect ratio is not written into the size but is conventionally treated as an 80-series profile. For 1959 Porsche applications, 155R15 belongs to the 356 A rather than the Carrera.

Understanding that code helps separate it from the older numeric bias-ply sizes used on the same year Porsche range. A 356 A owner comparing 155R15 to 560-15 is not choosing between two versions of the same labeling system; it is a construction and format change as well. Confirm that your wheel width falls within the tire maker's approved range before making the jump to any specific radial product.

On a 1959 Porsche, 560-15 and 590-15 are numeric bias-ply sizes. The first number is the nominal section-width designation used in older American-style tire sizing, and the 15 indicates a 15-inch rim diameter. The 560-15 applies to the 356 A, while the 590-15 applies to the Carrera. These are not metric radial sizes, and they represent a different tire construction and period presentation than 155R15 or 165R15.

That distinction matters because a buyer looking at a 1959 Porsche for restoration may prefer the visual profile and steering feel associated with a bias-ply tire, while a driver-focused owner may lean toward the model's radial option. The safest path is to match the size to the exact model first, then compare sidewall appearance, rim-width compatibility, and road-use expectations inside that model's correct bias-ply fitment.

For a 1959 Porsche 356 A, the comparison is 155R15 radial versus 560-15 bias-ply. For a 1959 Porsche Carrera, it is 165R15 radial versus 590-15 bias-ply. The radial options use modern radial construction and are typically favored by owners who plan to drive the car regularly on contemporary roads. The bias-ply options keep the older construction type that is more in step with period appearance and traditional restoration practice.

The right answer depends on how the car will be used. A judged restoration or highly original presentation usually points toward the model's bias-ply size, while a touring or weekend-driver car often leads owners toward the correct model-specific radial size. Either way, keep the choice within the proper 356 A or Carrera fitment rather than treating all 1959 Porsche tires as interchangeable.

1959 Porsche tires are available in blackwall, narrow whitewall, and wide whitewall styles, depending on size. The 155R15 radial choices are blackwall only, while 560-15 bias-ply tires for the 356 A come in narrow and wide whitewall versions. The 165R15 Carrera radial choices span blackwall, narrow whitewall, and wide whitewall, and 590-15 Carrera bias-ply tires come in blackwall and wide whitewall form. That gives the year a surprisingly broad range of visual options across its four sizes.

For a sports-car restoration, blackwall is usually the most conservative and era-appropriate direction, especially if originality is the goal. Whitewall choices can still make sense depending on the market, the car's presentation style, and the owner's taste, but event-specific authenticity standards vary. If the car is being prepared for judging, compare the sidewall style to period photos, sales literature, and marque-club guidance before finalizing the look.

Several brands cover 1959 Porsche fitments. The 155R15 size is available from Firestone and Michelin, 560-15 from Firestone and US Royal, 165R15 from Coker Classic, American Classic, Firestone, and BFGoodrich, and 590-15 from BFGoodrich and Avon. That mix gives 1959 Porsche owners access to both long-established collector-tire names and brands associated with European-style radial and sporting applications.

Brand choice on a 1959 Porsche usually comes down to the exact size you need first, then the sidewall style and construction that fit your project. Once you narrow it to the correct 356 A or Carrera size, compare whether you want a blackwall or whitewall presentation and whether the intended use leans toward preservation, show display, or regular road miles. Staying inside the correct size family matters more than chasing a brand name alone.

Rim-width guidance for 1959 Porsche tires varies by size. The 155R15 radial commonly fits 4.00 to 5.50-inch rims, while 560-15 bias-ply examples run on 4.5-inch rims or on a 4.50 to 5.50-inch range depending on brand. The 165R15 radial fits 4.50 to 6.00-inch rims, and 590-15 bias-ply tires fit 4.00 to 4.50-inch rims where rim-width figures are stated. All four sizes use a 15-inch rim diameter, but width compatibility is not the same across the year's fitments.

That spread is why wheel measurement matters before ordering any 1959 Porsche tire. A 356 A owner and a Carrera owner may both have 15-inch wheels, yet the correct width range can still differ enough to affect the right tire choice. Measure the actual wheel on the car, especially if it may have been changed during past restoration work, then match the tire to both the model and the wheel width.

Inner-tube requirements on 1959 Porsche tires depend on the exact product rather than the year and make alone. Within 155R15, Michelin offers both tube-type and tubeless-marked versions, so that size varies by product. The 560-15 and 590-15 bias-ply examples do not carry TT or TL markers in the same way, while one 155R15 Michelin X is marked TL and one Michelin XAS is marked TT. That means tube use cannot be assumed across all 1959 Porsche applications.

The practical step is to check the exact sidewall marking and confirm whether the wheel itself is suited to tubeless service. A tube-type tire needs the correct tube and valve-stem arrangement, and an older wheel may still lead an owner to use tubes even when a tire is marked tubeless. Treat inner-tube choice as part of the final setup decision, not just a detail attached to the vehicle year.

All 1959 Porsche tire sizes in this range mount on 15-inch wheels, so rim diameter is shared across the 356 A and Carrera fitments. That does not mean every original wheel can accept every size, because the approved rim-width range changes from one size to another. A 165R15 radial for a Carrera, for example, wants a wider range than a 590-15 bias-ply, and 155R15 differs from 560-15 as well.

The safest approach is to think of 15-inch diameter as only the first checkpoint. Original wheels can often stay in service when the tire size remains within the correct model family, but the wheel should still be measured and inspected before changing size or construction type. That is especially important on a 1959 Porsche that may have gone through decades of wheel swaps, refinishing, or prior restoration work.

A stored 1959 Porsche should be kept in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, or any other ozone-producing equipment. Tires last better when they are clean, properly inflated, and not sitting on damp concrete for long periods without protection. Because 1959 Porsche fitments include both radial and bias-ply construction, it is worth remembering that bias-ply tires are more prone to temporary flat-spotting during long static storage.

If the car will sit for months, move it periodically or use stands in a way that supports the vehicle safely without distorting the tire for extended periods. A breathable car cover helps the body, but the tire environment matters just as much. Good storage habits preserve sidewalls, reduce age cracking, and help a collector Porsche feel more predictable when it goes back on the road.

On a 1959 Porsche, tire age usually matters more than mileage because many collector cars cover limited annual miles. A sensible rule is to inspect closely once tires reach about five to seven years of age and to treat around ten years as the point where replacement deserves serious consideration even if tread depth still looks acceptable. The DOT date code on the tire is the best starting point for establishing age, along with any visible changes in the sidewall or tread.

That timeline is especially relevant for a lightly used sports car that may appear fine until heat cycles, storage conditions, and long idle periods catch up with the rubber. A 1959 Porsche used for occasional drives can age out its tires long before it wears them out. Keep a written record of installation dates and check the date code whenever you evaluate the car for seasonal use.

Tires on a 1959 Porsche should be checked before every drive and inspected more thoroughly before any extended outing. Look for sidewall cracking, tread separation, cuts, bulges, irregular wear, and pressure loss, and make sure each tire is holding air consistently. If the setup uses tube-type tires or tubes inside the assembly, pay close attention to valve stems and any signs of chafing, leakage, or unexplained pressure drop.

Frequent inspection matters because an older sports car can feel lively and capable even when the tires are aging quietly. A quick visual walk-around catches problems that are easy to miss in a garage-kept collector car, while a deeper pre-trip check lowers the odds of discovering trouble after the car is already hot and under load. Tire condition should be part of every normal pre-drive routine with a 1959 Porsche.

A 1959 Porsche 356 A would have been associated with bias-ply construction in period, and the year's 356 A fitments include 560-15 bias-ply as well as 155R15 radial alternatives used today. That makes 560-15 the more historically aligned construction choice when the goal is to echo the car's original era character. Sidewall appearance still depends on the exact restoration direction, since blackwall and whitewall preferences can differ by market and presentation style.

Owners aiming for strict authenticity should verify their target configuration against period literature, factory references, and Porsche marque-club guidance before settling on a final tire. A 1959 Porsche 356 A restored for touring may intentionally move to 155R15 radial, but that is a different objective from replicating a showroom-era look and feel. Keeping those two goals separate helps avoid confusion during a restoration.

Correct tire fitment matters on a 1959 Porsche because judges and knowledgeable enthusiasts often notice size, construction type, and sidewall style very quickly. A 356 A wearing its proper model-specific size sends a different message than a Carrera-size tire, and a modern radial can stand out immediately on a car judged for originality if the event emphasizes factory-era appearance. Whitewall width and blackwall presentation can also affect how authentic the car looks for its market and restoration theme.

That does not mean every show follows the same standard, but a 1959 Porsche entered for concours-style evaluation benefits from tire choices that match the event's expectations. Marque clubs and event rule books are the best references for what will actually be scrutinized. If the car is built more for driving than judging, you may reasonably make a different choice without trying to present it as a strict factory-correct restoration.

A 1959 Porsche Carrera sits in the same period context as the rest of the late-1950s Porsche range, so bias-ply construction remains the historically natural starting point for originality. Within Carrera-specific fitments, 590-15 is the bias-ply size and 165R15 is the radial alternative. That makes 590-15 the size most aligned with a period-style restoration, while 165R15 serves owners who want a Carrera-correct model fitment in radial construction.

Because the Carrera carries extra performance and collector significance, owners often care even more about getting the details right. A blackwall bias-ply setup may look most at home on a historically focused car, but final confirmation should still come from period photos, literature, and Porsche specialist guidance. Using the correct Carrera-specific size is the first authenticity checkpoint before brand or sidewall styling enters the conversation.

1959 Porsche tires can be suitable for highway driving when they are in good condition, correctly fitted, and used within their construction and speed-rating limits. Among the radial 155R15 options, T-rated products carry a 118 mph ceiling and H-rated products carry a 130 mph ceiling. The 590-15 range also includes an H-rated Avon bias-ply at 130 mph. Those figures are more than adequate for normal highway use, although a 1959 Porsche's brakes, suspension condition, alignment, and overall mechanical state remain just as important as tire capability.

The larger point is that safe road use depends on the whole car, not only the sidewall code. A collector Porsche with fresh tires can still be compromised by aged shocks, poor steering components, or old brake hydraulics. Treat tire selection as one part of a complete road-readiness plan, and match your cruising speed to the age, condition, and setup of the car rather than relying on the tire alone.

Inflation pressure on 1959 Porsche tires should follow the factory vehicle recommendation first and the tire maker's rated pressure information second. Among the current fitments, 155R15 carries a load figure of 1045 pounds at 44 psi on one application, 560-15 carries 970 pounds at 32 psi, 165R15 carries 1168 pounds at 35 psi or 1170 pounds at 36 psi depending on the product, and 590-15 carries 1050 pounds at 32 psi on some applications. Those figures are tire capacity references, not universal instructions to inflate every 1959 Porsche tire to the same pressure.

Use the owner's manual or marque-correct guidance to establish the car's intended front and rear pressures, then make sure the tire you select is appropriate for that duty. Do not transfer a pressure number from a 356 A tire to a Carrera tire, or from a radial to a bias-ply, simply because both mount on 15-inch wheels. Pressure should always reflect the specific tire, the wheel, and the actual vehicle application.

Before a longer drive in a 1959 Porsche, inspect every tire for cracking, cuts, bulges, uneven wear, embedded debris, and proper inflation. Check that the valve stems are sound, and if the car uses tube-type assemblies, be extra alert for slow leaks or stem movement that could signal trouble inside the tire. The spare should be checked too, because many collector cars carry old spares that have aged far beyond the roadworthy life of the tires on the ground.

A longer drive also deserves a broader mechanical walk-around that fits the age of the car. Confirm wheel fasteners, brakes, steering response, and suspension behavior before settling into sustained road speed. On a 1959 Porsche, tire readiness is part of the preparation, but not the whole story; the car rewards careful attention, and that same discipline is what makes an extended drive enjoyable instead of stressful.