1956 Austin A 40 Tires

The 1956 Austin A 40 uses two applicable tire sizes: 560-15 in bias-ply construction and 155R15 in radial construction. Both are 15-inch fitments, so the main difference is not wheel diameter but the tire’s sizing system and construction style.

That means the real decision is whether the car should keep a more traditional bias-ply presentation or use a radial-format alternative. A car with older original-style wheels, a restoration-minded appearance, or period driving feel may lead toward 560-15, while a radial selection starts with confirming wheel width and the rest of the vehicle setup.

The 1956 Austin A 40 uses a 15-inch rim diameter with both of its applicable tire sizes. That applies to the 560-15 bias-ply fitment and to the 155R15 radial fitment, so wheel diameter remains consistent across the available tire choices.

Rim diameter is only one part of the fitment check, though. Before choosing between bias-ply and radial options, confirm the actual wheel width on the car, especially if the car has replacement wheels or has been apart for restoration work. That helps narrow the choice to tires that suit both the size and the wheel’s usable width range.

The 1956 Austin A 40 Cambridge follows the same fitment pattern, with 560-15 as the bias-ply size and 155R15 as the radial size. Both of those sizes use a 15-inch rim, so the Cambridge does not introduce a different wheel diameter within this covered fitment.

That makes tire shopping simpler, because the focus shifts from sub-model differences to construction choice and appearance. The next step is deciding whether the Cambridge will wear a traditional bias-ply tire, a conventional 155R15 radial, or a radial alternative chosen to preserve a more vintage look while staying mindful of wheel width and clearance.

On the 1956 Austin A 40, 560-15 is a bias-ply tire size. It uses the older numeric sizing system common to mid-century vehicles, and it represents the traditional construction choice for buyers who want the look and sizing character associated with an earlier tire format.

That distinction matters because a 560-15 bias-ply is not the same thing as a radial alternative that happens to relate to the same fitment. Buyers considering a change in construction should confirm wheel width, compare how the car is used, and decide whether period-style appearance or radial-format road use is the stronger priority.

Two radial equivalents are available for 560-15 on the 1956 Austin A 40. The first is 155R15, which is the 80-series metric radial equivalent, and the second is 560R15, which is a bias-look radial equivalent intended to retain a more traditional visual presentation.

Each option should be evaluated as an alternative rather than assumed interchangeable. The recommended rim-width range for this equivalency path is 4 to 5 inches, and it is smart to confirm actual wheel width, overall dimensions, and steering or fender clearance before changing from the original-style bias-ply setup to a radial construction.

That choice depends on how the 1956 Austin A 40 is meant to be used and presented. A 560-15 bias-ply keeps the car in a traditional sizing and construction format, while 155R15 gives a radial option on the same 15-inch rim diameter, and 560R15 offers a bias-look radial alternative.

A restoration-minded owner may prefer the visual character of a bias-ply or whitewall bias-ply tire, while a driver focused on regular road use may look harder at radial choices. The decision should include wheel width, tire clearance, and the condition of the steering and suspension so the car’s setup matches the construction change.

Start with the construction and size format that match the car’s intended role. The 1956 Austin A 40 can use a 560-15 bias-ply tire for a traditional vintage presentation or a 155R15 radial for a more modern construction approach while staying on a 15-inch rim.

After the size decision, compare the tire’s visual style, rim-width compatibility, and the way the car is actually driven. A bias-ply buyer may focus on blackwall or whitewall appearance, while a radial buyer may compare classic touring-style series from Firestone, Michelin, Avon, and Vredestein. The best match is the one that suits both the wheel and the car’s purpose.

Sidewall choice depends on the size and construction you choose for the 1956 Austin A 40. The 155R15 radial offerings are blackwall, while 560-15 bias-ply options are available in blackwall, narrow whitewall, and wide whitewall styles.

That makes sidewall treatment an important part of the car’s finished appearance. A blackwall usually gives the most restrained look, while narrow and wide whitewalls create a stronger mid-century visual statement. The right selection depends on whether the goal is understated road use, a more restoration-oriented presentation, or a look that suits the trim and stance of the car.

The 1956 Austin A 40 has tire options from several brands across its two main sizes. 155R15 radial choices include Firestone, Michelin, Avon, and Vredestein, while 560-15 bias-ply options include Firestone, US Royal, Coker Classic, and Pro-Trac.

Brand matters most as part of the overall tire package rather than as a ranking exercise. A buyer should compare the size, construction, sidewall style, and tire series within each brand’s offering, then match that combination to the car’s wheel setup and intended use. That approach gives a more useful result than choosing by brand name alone.

For a period-style 1956 Austin A 40, the 560-15 bias-ply size is the most natural starting point because it keeps the car in a vintage numeric bias-ply format. That size is available in blackwall, narrow whitewall, and wide whitewall versions, which gives some flexibility in how traditional the finished appearance looks.

A restoration-oriented choice should balance size, construction, and sidewall presentation rather than focusing on size alone. If exact originality matters, compare the tire style against marque references, period photos, or other vehicle-specific documentation. That extra step is especially useful when choosing between blackwall and whitewall treatments that can change the character of the car.

Tire construction changes the visual impression of a restored 1956 Austin A 40 more than many buyers expect. A 560-15 bias-ply presents the car in a more traditional mid-century style, while a 155R15 radial usually gives a more modern tread and sidewall look even though it stays on the same 15-inch rim diameter.

That does not automatically make one choice better than the other. A car restored for touring may benefit from a radial-format approach, while a car aimed at a stronger period-style appearance may lean toward bias-ply, especially with a whitewall treatment. The final decision should reflect the car’s purpose as much as its cosmetic presentation.

Yes, modifications can affect tire fitment on a 1956 Austin A 40 even when the tire size itself is correct. Changes such as aftermarket wheels, different wheel widths, suspension work, ride-height changes, or body and fender alterations can all influence how a 560-15 or 155R15 tire sits and clears.

A car that has been modified should be checked at full steering lock and through normal suspension movement before settling on a tire choice. It is also worth confirming the actual rim width on the car, since a restored or updated vehicle may no longer match its earlier wheel setup. That simple check prevents many avoidable fitment problems.

Before driving a 1956 Austin A 40 on new tires, inspect the wheels, valve stems, and overall tire seating, then confirm inflation pressure and look for any sign of rubbing once the car is on the ground. It also helps to check steering and suspension components so the new tires are not working against worn hardware.

Collector cars often sit for long periods, so the first drive should be a careful one. Listen for contact noises, recheck pressure after the initial run, and make sure the tires have clear fender and steering clearance in real road conditions. That short inspection routine is useful whether the car is wearing bias-ply tires or a radial alternative.

Tires on a collector 1956 Austin A 40 should be inspected regularly for pressure loss, cracking, bulges, cuts, and uneven tread wear. That applies to both 560-15 bias-ply tires and 155R15 radials, especially on a car that may see limited seasonal use rather than steady weekly mileage.

Storage conditions matter almost as much as mileage on an older collector car. Keeping the Austin away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, and periodic visual checks help catch age-related issues before a longer drive. Low annual use does not eliminate the need for routine tire inspection.