1952 MG Tire Fitment Guide

1952 MG vehicles use three sizes overall: 155R15, 560-15, and 550-15. The 155R15 radial fits the MG, MGA, and Midget, while 560-15 bias-ply fits the MG and MGA, and 550-15 bias-ply fits the Midget. All three sizes use a 15-inch rim diameter. Rim width guidance varies by size, with 155R15 shown on 4.00 to 5.50-inch rims, 560-15 on 4.5-inch or 4.50 to 5.50-inch rims depending on product, and 550-15 on 3.00 to 3.50-inch rims.

Model identification matters most when choosing a bias-ply tire for a 1952 MG, because the Midget does not share the same numeric size as the MG and MGA. If you are choosing the shared 155R15 radial, the next step is confirming your wheel width and the specific product's sidewall marking rather than assuming every 15-inch wheel is suitable for every version.

On a 1952 MG, 155R15 is a metric radial size. The 155 indicates a nominal section width of 155 millimeters, the R identifies radial construction, and the 15 is the wheel diameter in inches. Because no aspect ratio is stated, this style of sizing conventionally falls into the euro-metric 80-series family used on many classic European applications.

That makes 155R15 the most straightforward choice for owners who want a radial tire across any 1952 MG model covered here. It is also the size with the greatest variation in product details, since some versions are tube type, some are tubeless, and Michelin versions appear with both T- and H-speed ratings, so the exact sidewall marking matters before final selection.

On a 1952 MG, sizes such as 560-15 and 550-15 use the older numeric bias-ply system. The first number is the nominal section width, written without a decimal point, so 560-15 corresponds to 5.60 inches wide and 550-15 corresponds to 5.50 inches wide, both for 15-inch wheels. These are bias-ply sizes rather than radial sizes.

The practical difference is model application as well as construction. The 560-15 size belongs with the MG and MGA, while 550-15 is the Midget bias-ply size. If a car is being restored with a strong focus on period appearance, the numeric bias-ply codes are usually the first place to look, but the correct one still depends on which 1952 MG model you have.

A 1952 MG owner choosing between 155R15 and a bias-ply size is really deciding between radial construction and period-style bias-ply construction. The 155R15 radial is available for all three models, while the bias-ply size depends on the model: 560-15 for MG and MGA, 550-15 for Midget. That means the construction choice begins only after you confirm which model you own.

Bias-ply tires usually appeal most to owners pursuing an era-correct restoration look and feel, especially when whitewall styling is part of the car's presentation. The 155R15 radial is the broader fitment path across the 1952 MG range and tends to suit owners who plan to use the car more regularly on modern roads. Either way, keep the 15-inch rim diameter in mind and verify wheel width before committing.

1952 MG tire sidewall styles vary by size. The 155R15 radial choices are blackwall only, the 550-15 bias-ply choice for the Midget is also blackwall, and the 560-15 bias-ply options for MG and MGA are available in both narrow whitewall and wide whitewall versions. Sidewall appearance is therefore tied directly to the size and model, not just to personal preference.

For a 1952 MG built around a restrained British sports-car look, blackwall tires usually align most naturally with the marque's character, especially on smaller sporting models. Whitewall choices can still be relevant for certain presentation goals, but they are concentrated in the 560-15 range rather than across the whole year and make. If authenticity matters, compare the intended show standard and period photos before deciding.

Four brands appear across the available 1952 MG tire sizes: Firestone, Michelin, US Royal, and Excelsior. Firestone and Michelin cover the 155R15 radial size, Firestone and US Royal cover the 560-15 bias-ply size, and Excelsior covers the 550-15 bias-ply size for the Midget. Brand choice therefore changes with the size you need, not just with the construction you prefer.

That split is useful when narrowing the field. If you are looking at a radial 1952 MG fitment, Michelin and Firestone are the relevant names; if you want the MG or MGA bias-ply size with whitewall options, Firestone and US Royal are the brands to compare. Midget owners looking for the 550-15 bias-ply fitment have a more focused path, so confirming the car's model and size first saves unnecessary cross-shopping.

Rim width requirements for 1952 MG tires depend on the size. The 155R15 radial is shown for 4.00 to 5.50-inch rims on the products that list width guidance. The 560-15 bias-ply size is shown on 4.5-inch rims or on a 4.50 to 5.50-inch range, depending on brand. The 550-15 bias-ply size for the Midget is intended for 3.00 to 3.50-inch rims.

That makes wheel width one of the most important checks before moving between the radial and bias-ply choices on a 1952 MG. A shared 15-inch rim diameter does not mean every wheel is equally suitable for every size. Measure the actual wheel or verify it against a trusted marque reference before choosing the tire that matches your intended setup.

Inner-tube use on 1952 MG tires depends on the exact size and product selected. Within 155R15, tube status varies by product: Michelin X appears as TL, Michelin XAS appears as TT, and Michelin XAS-FF appears as TL. The 560-15 and 550-15 product markings shown here do not include TT or TL designations in the size field, so the product sidewall specification should be checked individually before installation.

That variation matters because a 1952 MG owner cannot assume every radial or every 15-inch tire is set up the same way. If you are reusing original wheels, tube compatibility and wheel condition should be reviewed together. Matching the tire's sidewall marking to the wheel type is more important than relying on broad assumptions about the size alone.

All of the listed 1952 MG tire sizes use a 15-inch rim diameter, so they remain within the same basic wheel diameter family. That means original 15-inch wheels can often remain part of the conversation when comparing 155R15, 560-15, and 550-15. The key distinction is width, since the Midget's 550-15 calls for narrower rims than the other two sizes.

A 1952 MG owner should treat wheel diameter as only the first checkpoint. Before fitting any of these sizes to original wheels, confirm the wheel width and inspect the wheel itself for age-related damage, corrosion, or prior repairs. That is especially important when moving from a model-specific bias-ply size to the shared radial option or vice versa.

A stored 1952 MG should be kept away from direct sunlight, standing moisture, and ozone-producing equipment such as electric motors, compressors, or battery chargers. Clean, dry storage is better for both sidewalls and wheels, and maintaining proper inflation helps the tires hold their shape. Bias-ply tires can develop flat-spotting more readily during long static periods than radials, so construction type affects how quickly the car feels normal again after storage.

For longer layups, move the 1952 MG periodically or support it in a way that reduces constant load on one contact patch. If the car remains on its tires, rolling it a short distance occasionally can help. Storage habits matter just as much as miles driven on a collector car, because time, heat, and environment usually age the tire faster than use.

Tire life on a 1952 MG is usually determined more by age than by mileage. A collector car that sees occasional use can still need tire replacement after years of heat cycles, storage, and environmental exposure even if the tread looks healthy. As a general rule, tires should be evaluated closely once they reach the five- to seven-year range, and many owners consider replacement around ten years regardless of remaining tread.

Checking the date code is a smart habit on any 1952 MG, especially if the car was acquired with older tires already installed. A lightly driven roadster may never wear the tread out in the normal sense, but sidewall aging and internal deterioration still continue. Age-based replacement is one of the simplest ways to avoid preventable failures on a vintage car.

Tires on a 1952 MG should be inspected before every drive and again before any longer outing. Look for cracking, bulges, cuts, uneven tread wear, and signs of pressure loss, and check that the valve stems are in good condition. If your chosen setup uses tube-type tires, tube-related pressure loss and valve condition deserve extra attention because the system depends on more than the casing alone.

Frequent inspection is especially important on older sports cars because they may sit for extended periods and then be asked to run at sustained road speeds. A quick walk-around before a drive often reveals problems early enough to address them at home rather than on the shoulder. It is one of the lowest-effort, highest-value habits for preserving a 1952 MG.

A 1952 MG MG would have been associated with bias-ply construction in period, not with modern radial replacement tires. Within the sizes available here, that period-style path points to 560-15 for the MG model, while 155R15 represents a later radial-style alternative that fits the same 15-inch wheel diameter family. Original-equipment branding could vary by market and delivery history, so the construction type and size matter more than assuming one universal brand.

For a restoration-minded 1952 MG owner, that means starting with the correct model-specific bias-ply size before worrying about sidewall details. If the car is being prepared for judged events, consult marque clubs and factory literature for region-specific expectations on size and appearance. Those sources can help refine what is acceptable for your exact car without confusing later replacement practices with original fitment.

Correct tire fitment matters on a 1952 MG because judges and knowledgeable enthusiasts often notice size, construction, and sidewall appearance quickly. A radial tire on a car presented as strictly original can change the visual stance and period feel, and a sidewall style that looks out of character for the car can stand out even before anyone studies the tread. The right model-specific numeric size also matters, since the Midget does not share the same bias-ply size as the MG and MGA.

Owners preparing a 1952 MG for concours or marque judging should decide early whether the goal is factory-style authenticity or a tasteful driver restoration. That choice affects not only bias-ply versus radial construction but also whether a blackwall or whitewall presentation makes sense. Event standards vary, so marque clubs and judging manuals are the best final reference when points are on the line.

For the 1952 MG and MGA in 560-15, both Firestone and US Royal offer bias-ply tires with narrow whitewall and wide whitewall options, and both list the same 970-pound load capacity at 32 psi. The notable specification difference is rim-width guidance: Firestone is listed on a 4.5-inch rim, while US Royal is listed on a 4.50 to 5.50-inch range. The listed weights also differ slightly, with Firestone at 18 pounds and US Royal at 17 pounds.

That makes the comparison less about headline fitment and more about how closely the tire's exact specification matches your wheel and presentation goal. If a 1952 MG owner is chasing a certain whitewall look, both brands belong in the conversation. If wheel width flexibility is especially important, the stated rim-width range is one of the clearer distinctions to review before choosing.

1952 MG tires can be suitable for highway use when they are in good condition, properly fitted, and used within the limits shown on the tire. Among the 155R15 radial options, Michelin versions appear with T and H speed ratings, which correspond to 118 mph and 130 mph ceilings respectively. The bias-ply sizes shown here do not list speed letters in the size marking. On a car of this era, the vehicle's brakes, steering, suspension, and overall mechanical condition are often just as important to real-world highway confidence as the tire itself.

For most collector use, the decision is less about chasing top speed and more about matching the tire to how the 1952 MG will actually be driven. A lightly used show car and a regularly exercised road car may point to different construction choices even when both remain within safe operating limits. Fresh rubber, correct inflation, and an honest assessment of the whole car matter more than any single number on the sidewall.

Inflation pressure for a 1952 MG should follow the vehicle's factory recommendation for the car and the tire maker's rated pressure information for the specific tire chosen. The available load-and-pressure figures shown here include 1045 pounds at 44 psi for one 155R15 radial product and 970 pounds at 32 psi for the 560-15 bias-ply products that list load data. Those figures are tire ratings, not a blanket instruction to run every 1952 MG tire at the same pressure.

Because the sizes and constructions differ, pressure should never be transferred casually from one 1952 MG setup to another. Start with the car's original handbook or a trusted marque source for the vehicle baseline, then compare that with the individual tire's sidewall and manufacturer guidance. That approach avoids overinflating a smaller or different-construction tire simply because another size in the range carries a higher maximum figure.

Before a longer drive in a 1952 MG, inspect each tire for cracking, cuts, bulges, tread separation, and uneven wear, then verify cold inflation pressure and look over the valve stems. If the car uses a tube-type tire, valve hardware and any slow leak history deserve special attention. The spare should be checked as carefully as the road tires, because an aged spare is no help on a roadside stop.

A longer trip in a 1952 MG should also include a broader mechanical check beyond the tires, since vintage sports cars depend on the whole chassis being healthy. Brakes, fluids, steering free play, and cooling condition all deserve a look before sustained driving. Tire preparation is the first layer of confidence, but it works best when the rest of the car is equally ready for the outing.