1972 MG Tire Fitment Guide

1972 MG vehicles use four sizes overall, but they are not shared across the full range. The 1972 MG MGB uses 165R14, 155R14, and 520-14, all on 14-inch rims. The 1972 MG Midget uses 145R13 on a 13-inch rim. Rim-width guidance appears on some products: 165R14 covers 4.0 to 5.5 inches and 4.50 to 6.00 inches depending on the tire, 155R14 covers 4.00 to 5.50 inches, 520-14 covers 3.50 to 4.00 inches, and 145R13 covers 4.00 to 5.00 inches.

That means year and make alone are not enough for a confident tire choice on a 1972 MG. Start by identifying whether your car is an MGB or a Midget, then match the tire size to the wheel diameter already on the car. If you are working with an MGB, you also have a construction decision to make because both radial and bias-ply fitments exist within the 14-inch family.

On a 1972 MG, 520-14 is a numeric bias-ply tire size. The 5.20 portion refers to the nominal section width in inches, and the 14 is the wheel diameter in inches. On this application, 520-14 is used on the 1972 MG MGB rather than the Midget, and it appears in bias-ply construction with narrow whitewall styling.

That code matters because it points you toward a very different kind of tire than a metric radial. A 520-14 keeps the traditional look and feel associated with earlier tire construction, while the MGB's 155R14 and 165R14 options move into radial behavior. If originality, stance, and vintage sidewall appearance are part of your goal, 520-14 is the size to examine closely.

No, 1972 MG models do not all use the same tire size. The 1972 MG MGB uses three 14-inch sizes—165R14, 155R14, and 520-14—while the 1972 MG Midget uses one 13-inch size, 145R13. The wheel diameter difference alone separates the Midget from the MGB, and the MGB also spans both radial and bias-ply construction.

That model split has a direct effect on how you narrow your choices. If you own a Midget, the path is straightforward because the fitment stays within a single radial size. If you own an MGB, the first check is still wheel diameter, but after that you can decide whether your car is headed toward a factory-style restoration look or a more road-oriented radial setup.

For a 1972 MG MGB, the real comparison is between the bias-ply 520-14 and the radial 155R14 or 165R14. The 520-14 keeps the traditional bias-ply construction and narrow whitewall styling offered in this size, while the radial choices come in blackwall form from European and American heritage brands. The wheel diameter remains 14 inches across all three MGB sizes, so the choice is more about construction and presentation than basic wheel diameter.

Choose 520-14 when period-correct appearance and vintage tire character are the priority, especially on a restoration-minded car. Choose 155R14 or 165R14 when you want a radial fitment that feels more natural for regular road use. Before making the final call, confirm your wheel width and decide whether the car is being judged for authenticity, driven frequently, or used mainly for local fair-weather outings.

1972 MG tires come in two distinct sidewall directions depending on size. The radial sizes 165R14, 155R14, and 145R13 are available as blackwalls, while the bias-ply 520-14 for the 1972 MG MGB is offered with a narrow whitewall. That split aligns well with the era, since blackwall radials suit a later sports-car look and a narrow whitewall bias-ply tire creates a more stylized vintage presentation.

For most factory-style British sports car restorations, blackwall tires are usually the visual baseline to compare against period photos, brochures, and marque-club guidance. A narrow whitewall can change the look of an MGB quite a bit, even when the size itself fits correctly. If appearance matters as much as fitment, decide on sidewall style before comparing brands so you stay focused on the visual result you want.

1972 MG vehicles are covered by several well-known brands across their different sizes. The 165R14 for the 1972 MG MGB is available from Pirelli, Michelin, and Vredestein. The 155R14 MGB size comes from Michelin and Firestone, the 520-14 MGB size comes from Premium Sport, and the 145R13 for the 1972 MG Midget comes from Michelin and Firestone.

That brand spread gives you room to prioritize the type of tire rather than chasing one name across every fitment. European-branded metric radials often appeal to owners aiming for a classic import feel, while the bias-ply 520-14 occupies a different niche altogether. A smart way to narrow the field is to choose the correct size and construction first, then compare the brands that exist within that specific fitment.

Rim-width guidance for 1972 MG tires varies by size. The 165R14 used on the 1972 MG MGB covers 4.0 to 5.5 inches on one product and 4.50 to 6.00 inches on another. The 155R14 MGB size covers 4.00 to 5.50 inches, the 520-14 MGB bias-ply size covers 3.50 to 4.00 inches, and the 145R13 for the 1972 MG Midget covers 4.00 to 5.00 inches.

Those ranges matter because two tires with the same rim diameter can still expect different wheel widths. That is especially important on the MGB, where a 14-inch radial and a 14-inch bias-ply tire may not share the same preferred wheel width. Measure the wheel actually on the car before ordering, especially if the car has aftermarket wheels or a long-ago restoration with parts that may not be original.

Inner-tube status is not identical across all 1972 MG tires. The Michelin 165R14, Michelin 155R14, and Michelin 145R13 examples carry TL markings, which identify them as tubeless tires. Other products in those same sizes do not always carry the same marking, so tube status can vary by product. The 520-14 bias-ply offerings do not show a universal tube designation across the range.

The right way to handle that is to check the exact sidewall marking and match it to the wheel you are using. Original-style wheels, wheel condition, and whether the rim was designed for tubeless service all affect the final setup. If your car still has older wheels or wheels of uncertain history, inspect the rims carefully and confirm the tube decision before mounting the tires.

The 1972 MG MGB's three tire choices all use a 14-inch rim diameter, so they share basic diameter compatibility with 14-inch wheels. That includes the radial 165R14 and 155R14 as well as the bias-ply 520-14. Rim width is the point that still needs attention, because the acceptable ranges are not identical from one MGB size to another.

In practice, many owners can stay with 14-inch wheels while changing between the MGB's available sizes, but wheel width should be confirmed before treating every option as interchangeable. A radial may prefer a wider wheel than the 520-14 bias-ply size. If the wheels are original, verify their width directly rather than assuming they suit every tire simply because the rim diameter matches.

A 1972 MG should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can age rubber. Keep the tires properly inflated during storage and move the car occasionally so one section of the tread does not carry the load for months at a time. On an MGB running bias-ply 520-14 tires, temporary flat-spotting during long storage is more likely than with the radial sizes used on the MGB or Midget.

For longer storage intervals, many owners place the car on stands or at least roll it periodically to reduce static stress on the casing. Clean, dry floors and a breathable indoor cover help the car as a whole, but tire care starts with inflation and environment. If the car is stored for a season or more, inspect sidewalls and tread before the first drive rather than assuming the tires are unchanged.

Tires on a 1972 MG usually age out before they wear out, especially on collector cars that see limited seasonal mileage. A good rule is to begin evaluating them closely at about five to seven years of service and to treat the ten-year point as a serious replacement threshold even if the tread still looks usable. The DOT date code on the tire is the simplest way to verify age.

That time-based approach matters more than mileage on cars like the MGB and Midget because they are often driven irregularly and stored for long stretches. Sidewall cracking, hardening rubber, vibration, and pressure loss can all appear long before the tread is gone. If the date code shows significant age, replace the tires as part of the car's maintenance plan rather than waiting for obvious wear.

Tires on a 1972 MG deserve a quick inspection before every drive and a more deliberate inspection before any longer trip. Look for sidewall cracking, cuts, bulges, punctures, unusual tread wear, and any change in how the car holds air. Pay attention to valve stems as well, and if your final setup uses tubes, include the condition of the tube-related hardware in the inspection routine.

Frequent checks matter on older sports cars because they may spend weeks parked between drives and then be expected to run at road speed immediately. A visual scan takes only a minute, but it can catch age-related issues before they become a roadside problem. Uneven wear is also a useful early warning that the car may need alignment, suspension attention, or inflation adjustment.

A 1972 MG MGB would have been associated with period-correct sizing and appearance rather than a one-size-fits-all modern replacement approach. In this year, the MGB is covered by 165R14 and 155R14 radial sizes as well as the 520-14 bias-ply size, all on 14-inch rims. By the early 1970s, radial tires were already a familiar and appropriate fitment for many European cars, while bias-ply construction still matters for certain restoration goals and presentation styles.

If your goal is strict originality, confirm the exact specification against factory literature, surviving original cars, and MG marque-club resources because market and equipment details can vary. The key judging points usually start with the correct size family, construction type, and sidewall appearance. Treat the available choices as a strong starting point, then refine the final decision around how authentic you want the finished car to be.

Correct tire fitment matters a great deal when showing a 1972 MG, especially in classes that reward authenticity. Judges and knowledgeable enthusiasts often notice whether the car has the proper size family, the expected construction type for the restoration goal, and a sidewall style that suits the period. On a 1972 MG, putting a narrow-whitewall bias-ply look on a car expected to present as a blackwall radial sports car can change the car's visual credibility quickly.

That does not mean every event uses the same standard, so it helps to decide whether your car is being prepared for concours judging, marque-club display, or casual local shows. If originality is central, compare your tire choice with factory photos and event rules before mounting a full set. The more seriously the car will be judged, the more tire size, construction, and sidewall details deserve attention.

For a 1972 MG MGB in 165R14, both the Michelin XAS and Vredestein Sprint Classic are radial blackwall tires, and both carry an H speed rating with a 130 mph ceiling. The Michelin XAS shows a rim-width range of 4.50 to 6.00 inches and carries a TL tubeless marking, while the Vredestein Sprint Classic shows a rim-width range of 4.0 to 5.5 inches and a maximum load of 1,102 pounds at 51 psi. Their recorded weights also differ, with Michelin at 20 pounds and Vredestein at 16 pounds.

Those differences do not make one universally right and the other wrong, but they do affect how you compare them for a specific wheel and use pattern. Wheel width is the first technical checkpoint, since both tires share the same nominal size but not the same stated width range. After that, details such as the sidewall marking and the tire's overall character may guide the choice for a careful MGB restoration or touring setup.

1972 MG tires can be suitable for highway driving when the tire size, condition, and inflation are correct for the car. Among the radial options, 165R14 and 145R13 include H-rated examples with a 130 mph ceiling, while 155R14 includes a T-rated example with a 118 mph ceiling. The 520-14 bias-ply size for the 1972 MG MGB does not present the same kind of speed-letter information here, and its road behavior will differ from a radial even when used within appropriate conditions.

On a car of this age, the tire's rated capability is only part of the picture. Brake condition, suspension wear, steering play, alignment, and the general realities of 1970s sports-car engineering are just as important to safe highway use as the speed letter on the sidewall. A properly sorted MG on fresh, correctly chosen tires is a very different experience from one running old rubber and neglected chassis components.

Inflation pressure on a 1972 MG should be matched to the exact tire size and the tire manufacturer's rated information rather than copied from a different size. Available load-and-pressure figures include 1,102 pounds at 51 psi for one 165R14 tire, 990 pounds at 44 psi for one 155R14 tire, 1,230 pounds at 60 psi for 520-14, and 825 pounds at 44 psi for one 145R13 tire. Those figures are maximum load and pressure references for those specific tires, not universal running pressures for every 1972 MG.

For day-to-day use, start with the vehicle's factory recommendation from the owner's manual or service literature, then confirm that the tire itself is appropriate for those settings and for the car's load. Never assume that an MGB pressure applies to a Midget, or that a bias-ply setting should be transferred to a radial. Size-specific pressure discipline is one of the easiest ways to preserve ride quality, handling, and tire life.

Before a longer drive in a 1972 MG, inspect all four tires and the spare for cracking, cuts, punctures, bulges, and uneven wear, then confirm inflation with an accurate gauge. Check that the valve stems are in good condition, and if your tire setup uses tube-type components, make sure the entire assembly has been maintained correctly. A road test at local speeds is also worthwhile if the car has been parked for a long time.

Tires are only one part of the pre-drive routine on a vintage MG, so use that inspection as the start of a broader check of brakes, cooling, lights, fluid levels, and wheel fasteners. Small British sports cars can feel lively and confidence-inspiring when sorted, but they are less forgiving of deferred maintenance than a modern daily driver. A careful inspection before departure is the easiest way to protect both the car and the trip.