1950 MG Tire Fitment Guide

1950 MG vehicles use three tire sizes across the model range: 155R15, 560-15, and 550-15. The 155R15 radial size fits 1950 MG, 1950 MG MGA, and 1950 MG Midget models. The 560-15 bias-ply size fits 1950 MG and 1950 MG MGA models, while the 550-15 bias-ply size is used on the 1950 MG Midget. All three sizes mount on 15-inch rims, and the available rim-width ranges shown in current offerings run 4.00 to 5.50 inches for 155R15, 4.5 to 5.50 inches for 560-15, and 3.00 to 3.50 inches for 550-15.

That means year and make alone are not enough to choose correctly for a 1950 MG. Start by identifying whether you have the MG, MGA, or Midget application, then compare the wheel width on the car to the tire you want to run. The radial 155R15 is the common size across the whole lineup, while the bias-ply sizes split by model group. If originality matters, the model-specific bias-ply size is usually the first place to look, but the actual wheel should still be checked before final selection.

On a 1950 MG, 155R15 is a metric radial tire size. The 155 refers to a nominal section width of 155 millimeters, the R indicates radial construction, and the 15 is the wheel diameter in inches. In this older Euro-metric style, the aspect ratio is not written into the size, and the format is conventionally treated as an 80-series radial. Available versions include blackwall tires from Firestone and Michelin, with T and H speed-rated examples and both tube-type and tubeless markings depending on the specific product.

This size matters because it is the only fitment shared across every 1950 MG model listed here. It gives owners a single radial option that can work across MG, MGA, and Midget applications, provided the wheel width matches the tire's approved range. If you are comparing products within 155R15, pay attention to the full sidewall code rather than stopping at the basic size. The speed symbol and tube marking are part of the tire's intended setup and should be matched to the wheel and use case.

On a 1950 MG, both 560-15 and 550-15 are numeric bias-ply sizes. The first number is the nominal section width expressed in the older inch-based system, and the second number is the 15-inch wheel diameter. A 560-15 is associated with the 1950 MG and 1950 MG MGA applications, while a 550-15 is used on the 1950 MG Midget. The currently available 560-15 products include narrow whitewall and wide whitewall versions, while the available 550-15 product is a blackwall bias-ply tire.

These sizes are less universal than 155R15, so they should be chosen by model rather than by brand preference alone. Numeric bias-ply sizing also means wheel-width compatibility becomes especially important, because the 550-15 and 560-15 fitments are aimed at different wheel ranges. If your goal is to keep a 1950 MG visually faithful to an early postwar sports-car look, these sizes are the ones most likely to align with that direction. Just make sure the exact wheel on the car matches the tire's approved rim width.

No, not all 1950 MG models use the same tire size. Every listed model can use 155R15 in radial construction, but the bias-ply fitments split by model. The 1950 MG and 1950 MG MGA use 560-15, while the 1950 MG Midget uses 550-15. Even though the entire group stays on 15-inch wheels, the tire-size choice still changes by model.

That distinction matters most when a buyer wants a bias-ply tire, because the two older-style numeric sizes are not interchangeable simply because they share a 15-inch rim diameter. A Midget owner should not assume the 560-15 options apply just because they fit another 1950 MG model. If you are choosing the shared 155R15 radial, the fitment conversation becomes simpler, but wheel width and the product's own tube marking still deserve attention before installation.

For a 1950 MG or 1950 MG MGA, the choice between 155R15 and 560-15 is mainly a choice between radial and bias-ply construction. The 155R15 is a radial size available in blackwall form from Firestone and Michelin, while 560-15 is a bias-ply size offered by Firestone and US Royal with narrow whitewall and wide whitewall options. Both fit 15-inch wheels, but they represent different construction eras and a different visual character.

Owners who want a more traditional appearance often lean toward the 560-15 bias-ply path, especially when whitewall styling is part of the build. Owners who plan to drive their 1950 MG more regularly often begin with 155R15 because it is the lineup's radial option and is widely recognized as the more modern-feeling construction. The best answer depends on how you want the car to present and behave, not just on whether the tire physically mounts to a 15-inch rim.

1950 MG tires are available in more than one sidewall style, and the style changes by size. The 155R15 radial choices are blackwall only. The 560-15 bias-ply choices for MG and MGA applications come in narrow whitewall and wide whitewall versions from Firestone and US Royal. The 550-15 bias-ply option for the Midget is available as a blackwall.

That spread gives buyers an easy way to match the tire to the look they want. Blackwall tires usually suit a more understated sports-car presentation, while whitewall versions can create a stronger period impression on a restored MG or MGA. For a show-minded car, the sidewall style can matter nearly as much as the size itself, since judges and knowledgeable enthusiasts often notice whether the tire's visual treatment fits the era. A buyer comparing products should consider appearance and construction together rather than as separate decisions.

Several brands cover 1950 MG fitments, depending on size. The 155R15 radial size is available from Firestone and Michelin. The 560-15 bias-ply size is available from Firestone and US Royal. The 550-15 bias-ply size is available from Excelsior. Each brand appears in a different part of the fitment map, so the right brand choice starts with confirming the correct size for the model.

Brand choice on a 1950 MG is often tied to the style of restoration or driving experience a buyer wants. Michelin's radial offerings speak to later-period European radial development, while Firestone and US Royal provide classic-style bias-ply presentations in 560-15. Excelsior fills the single currently listed 550-15 path for the Midget application. Once the model and size are settled, then it makes sense to compare the finer points such as sidewall styling, tube marking, and speed symbol.

Rim-width requirements for 1950 MG tires vary by size. The available 155R15 radial products are approved for 4.00 to 5.50-inch rims where a range is stated. The available 560-15 bias-ply products are shown for 4.5-inch rims or a 4.50 to 5.50-inch range, depending on brand. The 550-15 bias-ply option for the 1950 MG Midget is intended for 3.00 to 3.50-inch rims.

This is one of the most important checks before selecting a tire, because all three sizes share a 15-inch diameter but not the same wheel-width expectations. A 155R15 may be suitable on a broader range of wheels than a 550-15 Midget fitment, and that can affect whether a given tire is appropriate for the wheel already on the car. Measure the wheel or verify it with a knowledgeable MG specialist before making a final choice, especially if the car has been restored or modified over the years.

Inner-tube requirements for 1950 MG tires depend on the exact product. Within 155R15, some products are marked TL for tubeless and others are marked TT for tube type, so that size varies by product rather than following one rule. The 560-15 and 550-15 products listed here do not carry TT or TL markings in their stated size descriptions. Any tire-and-wheel combination should be matched according to the tire's sidewall marking and the wheel's condition and design.

This matters because many vintage wheels and many reproduction tires can be configured differently even within the same nominal size. A buyer should not assume that all 155R15 tires for a 1950 MG are installed the same way just because the size code matches. When comparing products, read the full sidewall designation and confirm whether the wheel is appropriate for tube-type or tubeless use. That small detail can affect both installation parts and long-term reliability.

The original-style 1950 MG wheels can often accept more than one listed tire size in principle because every fitment here uses a 15-inch rim diameter. That means a 155R15 radial and a model-correct bias-ply size both share the same basic wheel diameter requirement. The important limitation is rim width, since the approved ranges differ between 155R15, 560-15, and 550-15.

A 1950 MG owner should treat wheel diameter as only the first checkpoint, not the final answer. If the car still wears its original wheels, measure them or confirm their width before moving from a model-specific bias-ply size to the shared radial fitment, or vice versa. That step is especially important on the Midget, where the 550-15 option is tied to a narrower wheel range than the larger tires. Diameter compatibility alone does not guarantee the right setup.

A 1950 MG should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment. Tire pressures should be kept at a maintained level during storage, and the car should either be moved periodically or placed on stands in a way that avoids long-term concentrated load on one contact patch. Bias-ply tires are generally more prone to temporary flat-spotting during static storage than radials, so that can be more noticeable on 560-15 or 550-15 fitments.

Good storage habits help preserve both appearance and drivability on a low-use collector car. Sidewall cracking from ozone and sun exposure can age a vintage-looking tire well before tread wear becomes an issue, and long stationary periods can leave a classic MG feeling rough for the first miles back on the road. If the car will sit for months, clean the tires, keep them off damp ground, and revisit pressure before the next outing. Storage discipline matters as much as mileage on cars used mainly for shows or weekend drives.

On a 1950 MG, tire life should be judged more by age and condition than by mileage. Collector vehicles often accumulate miles slowly, so a tire can look usable in tread depth while still aging out in the rubber. A practical rule is to begin evaluating tires closely at around five to seven years of age and to give serious replacement consideration at roughly ten years, even if they have not worn out. The DOT date code on the tire helps establish its age.

That approach is especially important for a classic British sports car that may spend long periods parked between drives. Heat cycles, storage conditions, inflation habits, and sunlight exposure all influence service life, and those factors can matter more than odometer readings. If a 1950 MG is driven only occasionally, the owner should not let low mileage create a false sense of security. Age-related hardening, cracking, or casing fatigue can become the real limiting factor well before the tread is gone.

Tires on a 1950 MG should be inspected before every drive and again before any longer outing. Check for sidewall cracking, tread damage, cuts, bulges, uneven wear, and signs that the tire is losing pressure between uses. If the car is fitted with a tube-type tire or a tire-and-wheel setup that uses tubes, valve stems and any tube-related hardware deserve the same level of attention. The spare should be included in the inspection routine as well.

Frequent inspection makes sense because a collector car's tire condition can change while parked, not just while being driven. A small crack or pressure loss that seems minor in the garage can become a much bigger problem on an older chassis with light weight, narrow tires, and vintage suspension geometry. Spending a few minutes on inspection before each run is one of the simplest ways to reduce avoidable trouble. It is also the best time to catch age-related deterioration before a roadside issue develops.

A 1950 MG MG would have been associated with bias-ply tire practice in its period, not with later radial norms. Within the available fitments here, the period-style size for the MG application is 560-15 in bias-ply construction, while 155R15 is the shared radial alternative used by modern owners. Original equipment branding could vary by market and replacement history, so the most dependable way to verify factory-correct details for a specific car is to compare period literature and consult a marque club or MG specialist.

For most restoration-minded owners, the key point is that construction type matters just as much as the nominal size. A radial can be an appealing driving choice on a 1950 MG, but a judged or tightly period-focused restoration usually starts from the bias-ply side of the fitment map. Sidewall treatment matters too, especially if you are trying to match a particular regional or show presentation. The closer the goal is to originality, the more important it becomes to verify the exact tire style against the car's intended market and restoration standard.

Correct tire fitment absolutely matters when showing a 1950 MG, especially in events that reward period accuracy. Judges and knowledgeable enthusiasts often look at size, construction type, and sidewall style together rather than treating them as separate details. A radial tire on a car presented as factory-correct can stand out immediately, and an obviously modern sidewall treatment may do the same. On the other hand, a well-matched bias-ply size and era-appropriate sidewall style usually support the overall authenticity of the restoration.

The practical takeaway is to choose the tire the same way you choose paint, trim, and upholstery: in context with the standard you are building toward. A local casual show may be flexible, while a stricter concours event may be far more exacting about construction and appearance. If a 1950 MG is being restored for competition, ask the relevant club or judging body what they consider acceptable before finalizing the tire. Event rules, market origin, and restoration philosophy can all influence what will be seen as correct.

For the 1950 MG and 1950 MG MGA applications, Firestone and US Royal both offer 560-15 bias-ply tires, but they differ in sidewall selection and approved rim-width presentation. Firestone offers narrow whitewall and wide whitewall versions shown for a 4.5-inch rim, each with a listed load capacity of 970 pounds at 32 psi. US Royal also offers narrow whitewall and wide whitewall versions, and those are shown with a broader 4.50 to 5.50-inch rim-width range, also at 970 pounds at 32 psi.

That means the choice is less about outright load capacity and more about appearance and wheel compatibility. A buyer with a wheel near the wide end of the approved range may appreciate the broader published fitment spread shown on the US Royal products, while someone focused on a particular whitewall look may choose whichever visual treatment best suits the restoration. Since both brands cover the same nominal size, confirming the actual wheel width is the smartest first step. After that, sidewall style usually becomes the deciding factor.

1950 MG tires can be appropriate for highway driving when they are in good condition, properly inflated, correctly matched to the wheel, and used within the tire's stated limits. Among the 155R15 radial products, the available speed symbols include T, rated to 118 mph, and H, rated to 130 mph. The bias-ply sizes listed here do not show speed symbols in the stated size descriptions. On a car of this era, the condition of the chassis, steering, brakes, and suspension often matters just as much as the tire itself at normal highway speeds.

The important distinction is not just whether a tire can run at highway pace, but whether the whole 1950 MG is ready for sustained road use. A healthy radial tire may feel different from a bias-ply tire at speed, yet neither should be treated as a license to outrun the capabilities of an early postwar sports car. Before longer or faster trips, confirm pressure, inspect the sidewalls, and make sure the rest of the car is equally prepared. Tire suitability and vehicle readiness should be evaluated together.

Inflation pressure on a 1950 MG should be set according to the vehicle manufacturer's recommendation for the car and the tire manufacturer's limit for the specific tire. The currently listed 560-15 bias-ply products show a maximum load capacity of 970 pounds at 32 psi, and the listed Firestone 155R15 radial shows a maximum load capacity of 1045 pounds at 44 psi. Those figures are tire ratings, not a blanket instruction to inflate every 1950 MG tire to that exact pressure in service.

The best practice is to start with the vehicle's specified operating pressure for the correct size and construction, then confirm that your chosen tire is being used within its rated limits. Pressure should never be copied from one size to another simply because both happen to fit a 15-inch wheel. Radial and bias-ply tires can respond differently, and a Midget's 550-15 fitment should not be treated like a 560-15 or 155R15 setup. Matching pressure to both the car and the exact tire keeps the conversation accurate.

Before taking a 1950 MG on a longer drive, inspect each tire for cracking, cuts, bulges, irregular wear, and stable inflation, then check the spare with the same care. If the car uses a tube-type setup, include the valve stems and any signs of tube-related leakage in the inspection. Tire age matters as much as visible condition on a collector car, so an older tire that looks clean at a glance still deserves a close look. Wheel security and overall brake and suspension condition should be part of the same pre-drive routine.

A longer drive puts more continuous heat and time into the tire than a short local run, and that can expose problems that stay hidden around town. A 1950 MG is light and responsive, which makes it enjoyable, but it also means changes in tire behavior are easier to feel and should not be ignored. Good preparation includes more than just topping off air. Taking a few extra minutes for a deliberate walk-around can prevent a minor age or inflation issue from becoming the reason the trip ends early.