1950 Austin Tire Fitment Guide

1950 Austin vehicles use two tire sizes: 700-16 for the Austin A 125, and 550-16 for the Austin A 70 and A 90. Both are bias-ply sizes and both mount on 16-inch rims. Where rim-width guidance is available, 700-16 fits a 4.50 to 5.50-inch rim range, while 550-16 fits a 3.25 to 4.00-inch rim range on the products that publish that specification.

That means year and make alone are not enough to choose a tire for a 1950 Austin. An A 125 owner needs to stay with the larger 700-16 fitment, while A 70 and A 90 owners should focus on 550-16. Once the model is confirmed, the remaining decisions are mainly about appearance and product details, such as blackwall versus wide whitewall and whether the published rim-width range matches the wheel currently on the car.

On a 1950 Austin, 550-16 is an older numeric bias-ply tire size. The 550 portion refers to nominal section width in a period sizing convention, and the 16 identifies the wheel diameter in inches. On 1950 Austin models, that size applies to the A 70 and A 90 rather than the larger A 125.

Modern buyers sometimes expect a metric code with an aspect ratio and radial marking, but 550-16 predates that style of labeling. The key takeaway is that it is a 16-inch bias-ply fitment intended for the smaller Austin saloons in this lineup. If you are comparing products in 550-16, look beyond the size itself and check details like sidewall style, published load information, and the recommended rim-width range on the exact tire you are considering.

On a 1950 Austin, 700-16 is also an older numeric bias-ply size. The 700 indicates nominal section width in period form, and the 16 means the tire mounts on a 16-inch wheel. Within the 1950 Austin range, 700-16 belongs to the A 125 and is not shared with the A 70 or A 90.

That larger numeric size reflects the A 125's place as the biggest model in this group, so it should not be treated as an interchangeable alternative for the smaller Austin saloons. If your car is an A 125, focus on 700-16 products and then compare blackwall or wide whitewall appearance, load figures where published, and the listed rim-width range. Starting with the correct model keeps the rest of the selection process straightforward.

1950 Austin tires are available in both blackwall and wide whitewall styles across the listed sizes. In 700-16 for the A 125, blackwall versions appear alongside wide whitewall choices. In 550-16 for the A 70 and A 90, blackwall and wide whitewall options are also offered, giving owners a period-style appearance choice within the correct size.

Blackwalls usually suit a more restrained factory-style presentation, especially on practical British saloons, while whitewalls can give a car a dressier export-market or show-oriented look. The right choice comes down to how you want the finished 1950 Austin to read visually. If authenticity is a priority, compare your intended sidewall style with period photos, club guidance, and the market your particular Austin was built for rather than assuming every surviving example wore the same treatment.

Several brands cover 1950 Austin fitments. In 700-16 for the A 125, available brands include Lester, Avon, BFGoodrich, and Firestone. In 550-16 for the A 70 and A 90, brands include Excelsior, Avon, BFGoodrich, and Firestone. All of the listed options for these Austin sizes are bias-ply tires.

That brand spread gives 1950 Austin owners a meaningful choice in appearance and product character without stepping outside the correct period construction type. Avon can feel especially natural on a British car from this era, while BFGoodrich, Firestone, Lester, and Excelsior each bring their own restoration appeal. The practical move is to narrow the search by model and size first, then compare the brands that exist within that exact fitment rather than jumping between sizes.

BFGoodrich and Firestone both cover 1950 Austin fitments in bias-ply construction, but their published details differ by size. In 700-16, BFGoodrich lists a 1,900-pound maximum load at 36 psi, a 4.50 to 5.50-inch rim-width range, and a 26-pound tire weight, while Firestone lists 1,800 pounds at 36 psi, the same 4.50 to 5.50-inch rim-width range, and a 29-pound weight. In 550-16, Firestone publishes 840 pounds at 32 psi and a 3.25 to 4.00-inch rim-width range, while the BFGoodrich whitewall version in that size is listed without those extra figures.

For a buyer, that means the differences are less about broad claims and more about the exact specifications and visual treatment attached to each product. If you are choosing between the two for a 1950 Austin, compare the size-specific published load and rim information, then weigh that against the sidewall look you want on the car. Keeping the comparison inside one size is more useful than trying to judge the brands as if every Austin application were the same.

Published rim-width guidance for 1950 Austin tires depends on size. In 700-16, the listed fitment range is 4.50 to 5.50 inches on the products that specify rim width. In 550-16, the listed fitment range is 3.25 to 4.00 inches on the products that publish that detail. Both sizes use 16-inch rims, but they do not share the same width range.

That difference matters because a tire can match the wheel diameter yet still be wrong for the wheel's width. Before fitting new tires to a 1950 Austin, confirm the actual wheel dimensions on the car rather than assuming every 16-inch Austin wheel is identical across models. A 700-16 for an A 125 belongs on a meaningfully wider wheel than a 550-16 used on the A 70 or A 90, and that affects both appearance and proper support of the tire.

The listed 1950 Austin tire products do not consistently show tube-type or tubeless markings, so inner-tube use should be confirmed on the specific tire and wheel combination you intend to run. That is especially important on a 1950 Austin because collector cars of this era often retain original-style wheels that may have been designed with tube use in mind, even when the tire itself is a reproduction product.

The practical step is to inspect the wheel, verify how it is constructed, and then match that to the sidewall marking and manufacturer guidance for the exact tire you choose. If your Austin still uses original rims, pay close attention to wheel condition, valve-stem compatibility, and whether the wheel surface is suitable for the intended setup. Treat tubes as a fitment decision tied to both the tire and the wheel, not just the tire size alone.

Original 1950 Austin wheels can share the same 16-inch diameter across the model range, but the two tire sizes are not directly interchangeable just because the rim diameter matches. The A 125 uses 700-16, while the A 70 and A 90 use 550-16. Where published, 700-16 and 550-16 also call for different rim-width ranges, so diameter alone does not settle the question.

A buyer should think of these as model-specific fitments rather than alternate sizes for the same wheel set. If your 1950 Austin still has its original wheels, confirm both the model and the wheel width before assuming a larger or smaller numeric bias-ply tire will work properly. That is especially important on restored cars assembled from mixed parts, where 16-inch wheels may be present but not necessarily be the correct width for the intended tire.

A 1950 Austin should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age rubber. Because these Austin fitments are bias-ply tires, long static storage can also encourage flat-spotting more readily than many later radial designs. Clean floors, stable temperatures, and protection from moisture help preserve both the casing and the sidewall finish.

For collector use, keep the tires at proper inflation, move the car periodically if possible, and avoid letting it rest for months with the same contact patch carrying the load. Some owners use stands for very long storage, but the car should be supported carefully and only as part of an overall preservation plan. A fitted spare deserves the same attention, since an overlooked spare tire can be the weakest link on a vintage Austin.

Tires on a 1950 Austin should be judged by age and condition more than mileage. Collector cars often see limited road use, so tread depth can remain acceptable long after the rubber itself has aged. A sensible rule is to inspect closely once tires reach roughly five to seven years of service, and to treat the ten-year point as a serious replacement threshold regardless of outward appearance.

The most useful guide is the tire's date code together with its real condition: sidewall cracking, hardening, persistent pressure loss, or signs of casing fatigue matter more than how little the car has been driven. Bias-ply collector tires can look serviceable while still aging out. If your 1950 Austin is used for tours or longer seasonal drives, age-based replacement is especially important because a low-mileage tire is not automatically a fresh tire.

Tires on a 1950 Austin should be inspected before every drive, and more thoroughly before any longer outing. Look for sidewall cracking, tread separation, embedded damage, cuts, bulges, uneven wear, and signs that the tire is no longer holding pressure consistently. On an older collector car, a quick walk-around is not enough if the car has been parked for extended periods.

A more detailed inspection should also include the valve stems, wheel condition, and the spare. If your 1950 Austin uses tubes, stem alignment and slow pressure loss deserve extra attention because tube-related issues can show up differently than a simple puncture in a tubeless setup. Regular checks matter as much as periodic replacement, especially when the car is driven infrequently and problems can develop while the vehicle sits between outings.

A 1950 Austin A 125 would have been fitted originally with bias-ply tires, and the correct listed size for the model is 700-16. That matches the construction type expected for a passenger car of this era, before radial fitments became the normal choice on everyday vehicles. The size itself is the first authenticity checkpoint, followed by the sidewall look that best matches the car's intended market and presentation.

For restoration work, that means an A 125 owner should begin with a proper 700-16 bias-ply tire rather than treating the car like a later radial-era vehicle. Sidewall style can still vary depending on whether the goal is a restrained factory-type appearance or a dressier show finish. If you are aiming for strict historical accuracy, compare against period literature, surviving photos, and Austin club guidance rather than assuming one sidewall treatment fits every A 125 delivered in 1950.

Correct tire fitment matters on a 1950 Austin because judges and knowledgeable enthusiasts notice whether the size, construction, and sidewall presentation suit the car's era and model. A 700-16 bias-ply on an A 125 and a 550-16 bias-ply on an A 70 or A 90 align with the proper period style, while a visibly modern alternative or the wrong model's size can distract from an otherwise careful restoration.

What counts as fully correct depends on the event and the standard being applied. Some shows focus on overall period impression, while concours-level judging can be stricter about construction type and whitewall treatment. Before finalizing tires for a show-bound 1950 Austin, check the event rulebook and consult Austin marque specialists so the finished car reflects the expectations for the exact class, market, and restoration philosophy you are entering.

For the 1950 Austin A 125, Lester and Firestone both offer 700-16 bias-ply fitments, but they present the car differently and carry different published specifications. The Lester option in this size is a wide whitewall and is listed at 28 pounds. The Firestone 700-16 is also a wide whitewall, with a published maximum load of 1,800 pounds at 36 psi, a 4.50 to 5.50-inch rim-width range, and a 29-pound weight.

That comparison is useful for restorers because it shows that even two correct-size bias-ply tires can differ in the details that shape an authentic build. A buyer choosing between them should compare the look of the sidewall, the listed service specifications, and how those details align with the wheel and the intended use of the car. On a large 1950 Austin saloon, those small specification differences can matter as much as the brand name on the sidewall.

1950 Austin tires can be suitable for normal road use when they are the correct size, properly fitted, and in sound condition. The published speed symbol in these fitments appears on Avon 550-16 as L, which corresponds to 75 mph, while other listed products may not display a speed symbol in the same way. Because all listed 1950 Austin fitments are bias-ply, road feel and response will remain true to an older tire design rather than a modern radial experience.

Highway safety in a 1950 Austin depends on more than tire speed capability alone. Brakes, steering, suspension, wheel condition, and the overall mechanical state of the car are often more limiting factors than the tire at ordinary touring speeds. The safest approach is to match the tire to the correct model, keep inflation and condition in check, and drive with the expectations appropriate to a postwar Austin rather than to a modern sedan.

Inflation pressure for 1950 Austin tires should follow the vehicle's original guidance first, then be checked against the individual tire's published service information. In the listed products, Firestone 550-16 shows 840 pounds at 32 psi, BFGoodrich 700-16 shows 1,900 pounds at 36 psi, and Firestone 700-16 shows 1,800 pounds at 36 psi. Those figures are tied to specific tire sizes and products and should not be transferred casually from one Austin model to another.

The practical takeaway is to avoid guessing by appearance alone, especially with bias-ply tires that can look different at rest than later radial designs. Start with the pressure recommended for your exact 1950 Austin model, then confirm it is appropriate for the tire you have selected. If the car has changed wheels or carries touring loads beyond normal local driving, reassess the setup carefully rather than assuming one pressure suits every size in the lineup.

Before a longer drive in a 1950 Austin, inspect each tire for cracking, cuts, bulges, uneven wear, exposed cords, and pressure loss. Check that the tires match the correct model size—700-16 for the A 125 or 550-16 for the A 70 and A 90—and confirm the spare is usable as well. Valve stems, wheel fasteners, and any signs of rubbing or clearance problems should also be reviewed before setting off.

Tires are only one part of the preparation for a postwar British car, so a longer outing should also include a broader mechanical check of brakes, steering, cooling, and charging systems. Still, tire condition is one of the easiest things to verify before departure and one of the most important for peace of mind on the road. A careful pre-drive inspection helps a 1950 Austin feel composed and predictable instead of asking the tires to compensate for neglected maintenance.