1973 Austin Tire Fitment Guide

1973 Austin fitment centers on the Marina, and that model uses two sizes: 155R13 and 560-13. Both are 13-inch tire sizes, but they are not the same type of tire. The 155R13 is a radial size and fits rims in the 4.00- to 5.50-inch range, while the 560-13 is a bias-ply size with products fitting rims from 3.50 to 4.50 inches depending on the tire.

That means a 1973 Austin buyer is usually choosing between two constructions rather than two different wheel diameters. A Marina owner should confirm the actual wheel width on the car before ordering, especially if the car has changed hands several times or has already been restored. Once wheel width is verified, the next step is deciding whether the car should wear a radial for later-style road manners or a bias-ply for a more period-oriented presentation.

On a 1973 Austin, 155R13 is a metric radial tire size. The 155 refers to nominal section width in millimeters, the R identifies radial construction, and the 13 is the wheel diameter in inches. In this older euro-metric style, no aspect ratio is printed, and it is conventionally understood as an 80-series profile.

That decoding matters because 155R13 is not just another way of writing 560-13. It points you toward a radial tire built around a metric sizing system that became increasingly familiar in the 1970s. For a Marina owner, that often makes 155R13 the easier route when the goal is a later-period driving character, but the wheel width still needs to match the tire's approved range.

On a 1973 Austin, 560-13 is a numeric bias-ply tire size. The 560 expresses the nominal section width in the older numeric system, and the 13 is the rim diameter in inches. Unlike a modern metric radial code, it does not use an R to indicate radial construction, so the format itself points to a traditional bias-ply tire.

That older sizing style is important for anyone restoring a Marina with an eye toward period appearance. The available 560-13 choices also bring sidewall styling into the decision, since narrow whitewall and wide whitewall versions exist. If your wheel width is appropriate for the tire, 560-13 is the size to consider when construction style and visual authenticity matter as much as basic fitment.

For a 1973 Austin Marina, the 155R13 and 560-13 both fit 13-inch wheels, but they represent two different approaches. The 155R13 is a radial, while the 560-13 is a bias-ply. That makes the decision less about wheel diameter and more about whether you want a later-era radial construction or a more traditional bias-ply format that better matches an older visual presentation.

A Marina being judged, preserved, or styled with a period-correct look often points owners toward the 560-13, especially if whitewall appearance is part of the build. A Marina intended for regular road use may steer owners toward the 155R13 radial. Before making the final call, check the wheel width on the car, since the radial and bias-ply options do not share the same approved rim-width range.

Sidewall style depends on the size you choose for a 1973 Austin Marina. The 155R13 radial is available in blackwall form, while the 560-13 bias-ply comes in narrow whitewall and wide whitewall versions. That creates a clear visual split between the two sizes, with the radial leaning more understated and the bias-ply offering stronger period styling cues.

For many 1970s British cars sold in modest trims, blackwall tires usually look the most natural, especially on a road-driven Marina with a factory-like stance. Whitewalls can still suit the car if the owner is chasing a certain restoration flavor or showroom-era replacement-tire look. The right choice comes down to how original you want the car to appear and whether your preferred sidewall treatment matches the way the Marina is being presented.

1973 Austin tire coverage includes Michelin and Dunlop in the 155R13 radial size, plus BFGoodrich and Firestone in the 560-13 bias-ply size. Michelin's offering is the XAS family, and Dunlop covers the size with the SP Sport Aquajet line. The bias-ply side includes BFGoodrich Silvertown Classic Bias Ply versions and a Firestone Classic Bias Ply option.

Brand choice on a 1973 Austin Marina often follows the type of ownership experience you want. Some owners prefer a European-flavored radial option that feels appropriate to a small British car of the era, while others want an American classic-tire brand in a bias-ply format for visual impact. Once you have settled on size and construction, brand becomes the finer point rather than the first decision.

Rim width depends on which tire size a 1973 Austin Marina will use. The 155R13 radial fits rims from 4.00 to 5.50 inches wide. The 560-13 bias-ply spans narrower wheels, with some products fitting 3.50- to 4.00-inch rims and others fitting 4.00- to 4.50-inch rims, so the exact tire matters.

That difference is one of the most important checks before ordering for a Marina. A wheel that works well with the radial may not be ideal for every bias-ply version, and vice versa. Measuring the wheel on the car is worthwhile if there is any doubt, especially on a restored or modified vehicle, because proper rim width affects both the tire's shape and the way it sits on the car.

Tube details on 1973 Austin tires depend on the size and the specific product. The Michelin 155HR13 carries a TL marking, which denotes tubeless construction, while the Dunlop 155R13 uses a different sidewall notation. The 560-13 bias-ply products do not all carry the same tube notation in the size marking, so tube use should be confirmed against the exact tire and the wheel condition.

That matters most on older wheels, where rim design and sealing condition can influence whether a tube-type setup is appropriate. A Marina owner should check the sidewall marking on the exact tire being considered and inspect the wheel itself rather than assuming every 13-inch tire for the car is handled the same way. Matching tire type to wheel condition is more important than relying on broad assumptions.

A 1973 Austin Marina uses 13-inch tire sizes in both 155R13 and 560-13, so the wheel diameter is compatible with either choice. That shared diameter is the easy part. The more important issue is wheel width, because the radial and bias-ply options do not all share the same approved rim-width range.

If the car still has its original wheels, they may work with both sizes, but that should be verified against the exact width of the rim and the exact tire selected. This is especially important when moving from a narrower bias-ply application toward a broader radial-approved range. Treat the 13-inch diameter as common ground, then verify width before assuming every product will mount appropriately.

A 1973 Austin should be stored away from direct sunlight, electric motors, battery chargers, welders, and other ozone sources that age rubber prematurely. Clean, dry flooring helps, and the car should either be moved periodically or supported in a way that reduces long-term static loading. Bias-ply tires such as 560-13 tend to flat-spot more readily during long storage than a radial like 155R13.

For a Marina that spends much of its life in a garage, those storage habits have a real effect on how the tires look and feel when the car goes back on the road. Tire cradles, modest pressure checks, and occasional rolling can help keep the contact patch from taking a set. Owners using bias-ply tires should be especially patient after storage, since temporary flat-spotting can be more noticeable at first drive-off.

On a 1973 Austin, tire age usually matters more than mileage. Collector-car tires are commonly evaluated closely once they reach about five to seven years of service, and many owners begin serious replacement consideration as they approach ten years from the DOT date code. That guideline applies even if tread depth still looks healthy, because rubber hardens and ages long before a low-use classic wears a tire out.

A Marina that only sees short fair-weather drives can still end up on old tires that appear usable at a glance. Sidewall condition, pressure retention, ride feel, and date code all deserve attention, not just tread. If the car has been in storage for long periods or has spent time outdoors, age-related replacement becomes even more important than distance driven.

Tires on a 1973 Austin should be checked before every drive and more carefully before any longer outing. Look for sidewall cracking, bulges, embedded debris, irregular wear, and pressure loss. If the Marina is running a tube-type setup or an older wheel arrangement, valve stems and any signs of leakage deserve extra attention as part of the same inspection.

Frequent checks matter because classics often sit longer than modern daily drivers, and problems can develop quietly between outings. A quick walk-around before a short local drive and a more thorough inspection before a road trip is a sensible routine. Catching a low tire, a cut sidewall, or an aging valve stem early is much easier than discovering it after the car is already on the road.

A 1973 Austin Marina sits in the period when radial tires were becoming increasingly common, especially on European small cars, while bias-ply replacement sizing still remained familiar in the collector and reproduction market. For that reason, both 155R13 radial and 560-13 bias-ply options are relevant when discussing Marina fitment. The safest original-equipment assumption for the era is to verify size and construction against the car's handbook, surviving placards, or a marque specialist rather than relying on memory alone.

That distinction matters because an original-equipment conversation is not always the same as a replacement-tire conversation. A restored Marina may look right on a radial if the goal is later-1970s authenticity, while a bias-ply may suit a different presentation or judging expectation. If the car will be shown, consult Austin and British Leyland enthusiasts' clubs to confirm the exact standard that applies to your market and build.

Correct tire fitment does matter when a 1973 Austin is judged seriously. Size, construction, sidewall style, and overall visual character can all affect how authentic the car appears. On a Marina, the difference between a blackwall radial and a whitewall bias-ply is immediately visible, so the tire choice can change the whole presentation even when both sizes are acceptable from a basic fitment standpoint.

For concours or marque-specific events, judges may care whether the tire looks appropriate to the period, market, and trim level of the car. A radial on a car judged for strict originality, or a whitewall treatment that does not match the intended presentation, can draw attention even if the tire physically fits. Event standards vary, so owners should review the rulebook and compare their tire choice to known reference cars before final preparation.

For a 1973 Austin Marina in 155R13, the Michelin XAS and Dunlop SP Sport Aquajet share the same basic radial size and both carry an H speed rating, which corresponds to a 130 mph ceiling. The Michelin is marked 155HR13 78H TL and fits rims from 4.00 to 5.50 inches wide, while the Dunlop appears as 155R13 78H and carries a published max load of 937 pounds. Both weigh 20 pounds.

That means the choice between them is a matter of product detail rather than a change in overall fitment category. A Marina owner comparing the two should pay attention to the exact sidewall marking, whether tubeless notation matters for the intended wheel, and how the car's wheel width aligns with the Michelin's published rim range. They occupy the same radial lane, but the finer setup details still deserve a close look.

1973 Austin Marina tires can be suitable for highway use when the size, construction, condition, and inflation are all appropriate. The 155R13 radial products carry an H speed rating, which means a 130 mph ceiling. The 560-13 bias-ply products use a different style of classic sizing, and their road behavior will feel more period-correct than modern, so tire condition and the car's setup matter as much as raw speed potential.

In practice, a Marina's real-world highway safety usually depends more on the whole vehicle than on the tire alone. Suspension wear, alignment, brakes, steering condition, and the age of the tires often matter more at normal road speeds than any headline speed letter. A well-sorted car on fresh, correctly inflated tires is the goal, whether you choose the radial or bias-ply path.

Inflation pressure on a 1973 Austin should be tied to the exact tire size and the vehicle manufacturer's recommendation, not borrowed from another size. The 560-13 bias-ply products publish a max load of 850 pounds at 30 psi, while the Dunlop 155R13 publishes a max load of 937 pounds. Those figures describe the tire's load-and-pressure capability, not automatically the pressure the Marina should run in normal service.

The best approach is to start with the Austin owner's manual or factory placard for the car, then compare that recommendation to the tire manufacturer's limits for the exact product. Do not transfer a 560-13 figure to a 155R13 radial or vice versa. Pressure tuning on an older British car should always stay inside the tire maker's allowed range while respecting the car's own factory guidance.

Before a longer drive in a 1973 Austin Marina, inspect each tire for cracking, cuts, bulges, weathering, uneven wear, and proper cold inflation. Check the valve stems, and if the car uses a tube-type arrangement, make sure there are no signs of leakage or chafing-related issues. The spare tire deserves the same attention, since a decades-old spare can be unusable even when it still holds air.

A longer outing is also the right moment to think beyond the tires themselves. Wheel fastener security, steering response, brake feel, and basic fluid checks all matter on a car of this age. Tires are only one part of the Marina's readiness, but they are the part in direct contact with the road, so a careful pre-drive inspection is one of the simplest ways to avoid trouble.