1957 Austin Tire Fitment Guide

1957 Austin vehicles use nine sizes spread across five models rather than one common fitment. The A 35 uses 145R13 or 520-13, the A 50 uses 165R13 or 590-13, the A 55 uses 165R14 or 5.90-14, the A 105 uses 185R15 or 640-15, and the A 95 uses 670-15, 185R15, or 640-15. Rim diameters therefore vary by model, with 13-inch, 14-inch, and 15-inch applications all appearing in the lineup.

That means year and make alone are not enough for a 1957 Austin tire decision. Start by identifying the model, then confirm whether you want the radial or bias-ply path that belongs to that car. Where rim-width guidance is listed, it also changes by size, so the wheel itself should be checked before settling on a final product.

On a 1957 Austin, 640-15 is a period numeric bias-ply size. The first number is the old-style nominal section width designation rather than a modern metric width, and the final number identifies a 15-inch rim diameter. In the Austin range here, that size fits the A 105 and A 95 and represents the traditional 1950s construction type rather than a later radial format.

Buyers usually encounter 640-15 when they want a more original-looking tire with period sidewall proportions and classic whitewall options. It should not be treated as interchangeable with the 13-inch or 14-inch Austin sizes, and it also differs in overall character from 185R15 even though both belong to the larger 15-inch Austin models.

On a 1957 Austin, 185R15 is an older Euro-metric radial size. The 185 identifies a nominal section width in millimeters, the R denotes radial construction, and the 15 is the rim diameter in inches; in this traditional format, the aspect ratio is typically understood as roughly 80-series. Within the 1957 Austin lineup, 185R15 applies to the A 105 and A 95.

That makes 185R15 the radial counterpart to period 15-inch bias-ply options on Austin's larger saloons. If you are comparing it with 640-15, the key difference is construction and driving character, not just the way the size is written. It remains important to confirm actual wheel width and the specific product's sidewall marking before making the final selection.

For a 1957 Austin A 105 or A 95, the choice between 185R15 and 640-15 is mainly a choice between radial and bias-ply construction. The 185R15 radial comes in blackwall, narrow whitewall, and redline forms with H- and V-rated examples, while 640-15 is a numeric bias-ply size offered in narrow and wide whitewall styles. Both are 15-inch applications, but they reflect different priorities in how the car is presented and used.

Owners chasing a factory-era look generally lean toward 640-15 because bias-ply construction matches the period more closely. Owners planning more regular road use often prefer 185R15 because radial construction feels more familiar on modern roads. The right answer depends on whether authenticity or updated road manners is the first priority for your particular Austin.

1957 Austin tires are available in a broad mix of sidewall styles depending on size. The radial 185R15 appears in redline, narrow whitewall, and blackwall form, while 640-15 bias-ply tires come in narrow and wide whitewall versions. Smaller sizes vary by model: 145R13, 165R13, and 165R14 are blackwall radials; 520-13 offers blackwall and narrow whitewall bias-ply choices; 590-13, 5.90-14, and some 670-15 products appear as wide whitewalls alongside blackwall options in the larger 15-inch size.

For a 1957 Austin restoration, sidewall style matters almost as much visually as the size itself. Many British cars of the period are most naturally associated with blackwalls, but whitewalls can be appropriate depending on market presentation and the look you are trying to recreate. If show authenticity matters, compare your intended sidewall style against period photos, sales literature, and marque-club guidance.

A wide mix of brands covers 1957 Austin sizes, and the brand choice changes with the tire size. Michelin, Firestone, Coker Classic, BFGoodrich, Dunlop, Pirelli, Vredestein, Premium Sport, US Royal, and Universal Vintage Tire all appear across the available Austin applications. Some sizes are narrow in brand choice, such as 590-13, while others, especially 670-15 and 185R15, offer a broader range of names and sidewall presentations.

That spread gives Austin owners room to choose by construction type, visual style, and period flavor rather than by size alone. British and European-style radial sizes naturally draw names such as Michelin, Pirelli, Dunlop, and Vredestein, while period American-style bias-ply reproductions appear under brands like Firestone, BFGoodrich, US Royal, and Coker Classic. The best approach is to start with the correct Austin model and size, then narrow by brand character and sidewall style.

Rim-width guidance for 1957 Austin tires varies by size. The listed 185R15 products fit from 4.5 to 6.5 inches depending on product, 640-15 ranges from 4.00 to 5.00 inches, 145R13 includes a listed 4.00 to 5.00-inch fitment, 520-13 appears at 3.5 inches or 3.50 to 4.00 inches, 165R13 is listed at 4.50 to 6.00 inches, 590-13 at 3.50 to 4.00 inches, 165R14 at 4.0 to 6.00 inches depending on product, and 670-15 at 4.50 to 6.00 inches.

Those ranges matter because even when two sizes share the same rim diameter, they do not necessarily share the same ideal wheel width. Before fitting a tire, compare the actual wheel width on your Austin against the specific product you want. That is especially important on cars that may have had wheels swapped during earlier restoration or service work.

Tube requirements on 1957 Austin tires depend on the exact size and product. Several radial products are explicitly marked TL, including Michelin examples in 185R15, 165R13, and 165R14, which identifies them as tubeless tires. Other listed products do not always show a tube marking in the size description, and the bias-ply offerings here are not uniformly labeled one way or the other.

The practical takeaway is to check the sidewall marking of the exact product and consider the wheel design before final fitment. Original wheels on many 1950s cars may still call for tubes even when a tire itself is capable of tubeless use. If your Austin still wears original-style wheels, that wheel condition and construction should be part of the decision, not just the tire size.

Original 1957 Austin wheels can only be used with the tire sizes intended for that specific model and rim diameter. The lineup includes 13-inch, 14-inch, and 15-inch tire applications, so an A 35 wheel is not a direct match for an A 55 or A 95 tire simply because the cars share the same year and make. Even within a single rim diameter, the listed tire sizes have different approved rim-width ranges.

That means the original wheels may work perfectly with both construction choices for a given model, but only after the wheel width is checked against the tire being considered. The larger 15-inch Austin models illustrate this well: they can use more than one 15-inch size, yet wheel-width compatibility still needs confirmation product by product.

A stored 1957 Austin should be kept in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment. Tires on collector cars age from time as much as from mileage, and bias-ply casings tend to flat-spot more readily during long static periods than radials. Maintaining proper inflation and moving the car periodically helps keep the casing from taking a prolonged set.

If the Austin will sit for months, many owners either roll the car occasionally or place it on stands so the suspension remains supported while weight is reduced on the tires. Clean, dry floors are preferable to damp ground, and any tire cover should be breathable rather than trapping moisture. Good storage habits preserve both sidewall appearance and long-term serviceability.

Tires on a 1957 Austin should be judged primarily by age, condition, and storage history rather than by mileage alone. A useful collector-car rule is to begin careful evaluation around five to seven years of age and to treat the ten-year point as a serious replacement threshold even if the tread still looks presentable. The DOT date code on the tire helps establish that timeline.

That matters because many vintage Austins accumulate only modest mileage but still spend long periods parked, which can harden the rubber and weaken the casing over time. A tire that appears fine in the garage may still be too old for confident road use. When in doubt, age and condition should outweigh remaining tread depth on a low-use classic.

Tires on a 1957 Austin deserve a quick inspection before every drive and a more thorough check before any extended outing. Look for sidewall cracking, cuts, bulges, irregular wear, embedded debris, and pressure loss. Where tube-type fitment is being used, valve stems and the wheel area deserve extra attention because a sound casing can still be let down by aging tube or valve components.

A short pre-drive walkaround is especially worthwhile on a collector Austin that may sit between uses. It is much easier to catch a problem in the garage than on the roadside after the tire has heated up. Seasonal checks are also a good time to verify spare-tire condition, since the spare is often the least-used and oldest tire on the car.

A 1957 Austin A 35 would have been associated with bias-ply construction when new, since that was still the standard tire type for most mainstream small cars of the period. In the fitments shown here, the A 35 uses either 520-13 as the period-style bias-ply choice or 145R13 as the later radial-format alternative. That makes 520-13 the closer match to original-era construction if authenticity is the main goal.

Original-market details can still vary by destination, trim presentation, and period replacement history, so serious restorers should compare against factory literature and Austin marque specialists before finalizing sidewall style. The key point is that construction type matters in addition to size. A car judged for originality will generally be expected to wear the type of casing that matches its era.

Correct tire fitment matters noticeably when showing a 1957 Austin because judges and knowledgeable enthusiasts tend to notice size, construction, and sidewall style very quickly. A model wearing the wrong rim-diameter size, an obviously later radial where originality is being judged closely, or a sidewall treatment that does not suit the period can all distract from an otherwise careful restoration. Even among cars of the same make and year, Austin model differences make the right size especially important.

For local casual events, those details may matter less than overall presentation and condition. For marque judging or concours-style competition, they matter more. If authenticity is your target, verify the exact model first, then confirm the size and sidewall appearance against period references and event-specific judging standards rather than relying on general assumptions about 1950s British cars.

For the 1957 Austin range, both 640-15 and 670-15 are 15-inch numeric bias-ply sizes, but they are not the same fitment. The A 95 can use either size, while the A 105 is paired with 640-15 rather than 670-15 in the sizes shown here. The listed 670-15 products also carry higher stated load figures, ranging from 1450 pounds at 32 psi to 1550 pounds at 32 psi, compared with the 640-15 examples at 970 to 1190 pounds at 32 psi.

That difference gives 670-15 a fuller, larger-duty place within the Austin lineup, especially on the A 95. It should not be selected simply because it shares the same 15-inch rim diameter as 640-15. For restoration accuracy and correct visual proportion, the size tied to the specific model is the one to follow unless you have strong period evidence for an alternate fitment.

1957 Austin tires can be suitable for highway driving when the tire type matches the intended use, the tires are in sound condition, and the speed rating is respected where one is provided. The radial sizes listed here include H-rated examples to 130 mph and a V-rated 185R15 example to 149 mph. Bias-ply sizes in this lineup do not show letter speed ratings in the same way, so they should be treated with the caution normally appropriate to period-style construction.

On a 1957 Austin, tire capability is only part of the highway picture. Brakes, steering, suspension, wheel condition, and the general age of the vehicle often become the more important limits long before a modern-rated radial reaches its ceiling. A well-sorted Austin on the correct tires can be enjoyable on modern roads, but the whole car should be prepared to the same standard as the tires.

Inflation pressure for 1957 Austin tires depends on the exact size and product rather than on one universal number for the whole make. The listed products include examples such as 185R15 at 35 psi for a stated 1355-pound load, 640-15 at 32 psi with 970- to 1190-pound load listings, 145R13 at 44 psi with an 825-pound load, 520-13 at 32 psi or 60 psi depending on product, 590-13 at 32 psi, 165R14 at 51 psi on one listed product, and 670-15 at 32 psi.

Those figures are tire ratings, not blanket vehicle settings. For actual use, compare the Austin owner's literature or factory guidance with the reproduction tire's own pressure and load specifications, then set pressures for the correct tire and wheel combination. Do not transfer a pressure from one Austin size to another simply because the cars are from the same year.

Before a longer drive in a 1957 Austin, inspect all four tires and the spare for cracking, cuts, bulges, abnormal wear, and stable inflation. Check valve stems, and if your setup uses tubes, pay close attention to any slow loss of pressure that could point to tube or valve issues rather than tread damage. Wheel condition, lug security, and a usable jack and spare should be part of the same pre-trip routine.

A proper pre-drive check on a 1957 Austin should also extend beyond the tires to the rest of the car. Cooling system health, brake performance, steering play, lighting, and charging condition all matter on a 1950s vehicle heading out for sustained road use. Tires are the first contact point with the road, but they work best when the rest of the Austin is equally ready.