1950 Lancia Tire Fitment Guide

1950 Lancia fitment in this year-and-make grouping centers on the Aurelia, which uses 165-400 and 165R400 sizes. Both are radial millimetric fitments built for 400mm rims rather than inch-designated wheels. The listed 165R400 products fit approved rim-width ranges of 4.50 to 6.00 inches or 6.0 to 7.0 inches, depending on the specific tire you choose.

That means the first step is confirming that your car is an Aurelia and that it still carries the correct 400mm wheel setup. After that, compare the exact tire marking on the car, the wheel itself, and the approved rim-width range for the individual tire you are considering. On an Aurelia, the choice is usually between two closely related millimetric radial markings, not between different wheel diameters.

On a 1950 Lancia, 165-400 is a millimetric tire designation. The 165 refers to a nominal section width of 165 millimeters, and the 400 refers to a 400mm rim diameter. In this year-and-make grouping it is treated as a radial fitment for the Aurelia, placing it firmly in the European postwar move toward radial tire technology.

That size can look unfamiliar if you are used to American inch-based sizes such as 6.70-15 or H78-15. The important point is that the 400 figure is a metric rim diameter, so a 165-400 tire is not meant for a 15-inch wheel. Before choosing a tire, verify that the wheels on your Aurelia are the proper 400mm type and not a later substitute.

On a 1950 Lancia, 165R400 is also a millimetric size. The 165 is the nominal section width in millimeters, the R identifies radial construction, and the 400 is the metric rim diameter. Available 165R400 tires for the Aurelia carry an 87S marking, which means an S speed rating with a 112 mph ceiling, and the listed versions are tube-type.

That makes 165R400 one of the more recognizable early European radial markings for an advanced postwar car such as the Aurelia. It also gives you a practical checkpoint when shopping: match the full size code, not just the width. A 165-width tire with the wrong diameter or a non-millimetric fitment can create problems even if the numbers look close at first glance.

Michelin is the brand offered here for 1950 Lancia fitment, specifically in 165R400 for the Aurelia. The available products are Michelin X Radial and Michelin X-Stop variants, both built as radial tube-type tires and both carrying an 87S marking. Sidewall presentation differs by product, with one blackwall option and one narrow whitewall option.

That narrow but focused selection suits the Aurelia well because Michelin is closely associated with early radial development in Europe. For a buyer, the key comparison is not brand-versus-brand shopping so much as choosing the exact 165R400 format, the correct approved rim-width range, and the sidewall look that best fits the way the car will be restored, shown, or driven.

1950 Lancia Aurelia tires are available here with two sidewall presentations in 165R400: blackwall and narrow whitewall. The Michelin X-Stop is offered as a blackwall, while the Michelin X Radial is offered with a narrow whitewall. Both are radial tube-type tires, so the cosmetic difference does not change the underlying construction type.

For many Aurelia owners, sidewall style is a visual authenticity choice as much as a fitment choice. A blackwall generally gives the car a restrained European look that suits many period restorations, while a narrow whitewall adds a more formal appearance. If you are preparing the car for judged display, compare your intended presentation with period photos and event standards before deciding.

For the 1950 Lancia Aurelia in 165R400, Michelin X Radial and Michelin X-Stop differ in sidewall style, approved rim-width range, and listed weight. The Michelin X Radial carries a narrow whitewall, fits 6.0 to 7.0 inch rims, and is listed at 17 pounds. The Michelin X-Stop is a blackwall, fits 4.50 to 6.00 inch rims, and is listed at 20 pounds.

Those differences matter because they affect both appearance and wheel compatibility. An Aurelia owner should first confirm which wheel width is actually on the car, then decide whether the visual goal is a blackwall or narrow whitewall presentation. Since both share the same 165R400 size and S speed rating, the comparison is mainly about fit within the approved rim range and how the finished car should look.

Available 1950 Lancia Aurelia products in 165R400 do not all use the same approved rim-width range. The Michelin X-Stop is listed for 4.50 to 6.00 inch rims, while the Michelin X Radial narrow whitewall is listed for 6.0 to 7.0 inch rims. Both are built for the same 400mm rim diameter, but the acceptable wheel width changes with the product.

That is why wheel measurement matters before you settle on one tire over another. Two tires can share the same size code and still have different approved wheel-width windows. On an Aurelia, measure the wheel or confirm it with a knowledgeable specialist before choosing between the available Michelin versions, especially if the car may have had wheels changed during its life.

The listed 165R400 tires for 1950 Lancia carry a TT marking, which identifies them as tube-type tires. Both available Michelin options for the Aurelia use that tube-type designation. For this fitment, tube use is part of the tire setup rather than an optional extra detail.

That means the condition of the tube, valve stem, and wheel interior matters just as much as the outer casing. When fitting fresh tires to an Aurelia, it is wise to inspect the wheel carefully for rust, burrs, or damage that could affect the tube. A clean wheel, correct tube, and careful installation help prevent slow leaks and service issues on a collector car.

The two 1950 Lancia Aurelia tire sizes shown here share a 400mm rim diameter, so they belong to the same millimetric wheel family. That supports use on the original 400mm Aurelia wheels, provided the specific wheel width falls inside the approved range for the exact tire selected. Diameter compatibility alone is not the whole fitting question.

An owner should treat wheel width as the deciding checkpoint before assuming that every 400mm tire option is equally suitable. The available 165R400 products already show that approved wheel width can differ within the same nominal size. If your Aurelia still has its original wheels, confirm width and condition before selecting a blackwall or narrow whitewall version.

A 1950 Lancia should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone sources that accelerate rubber aging. Keep the tires properly inflated, avoid prolonged contact with standing moisture, and move the car occasionally so one section of the tire is not carrying the load for months at a time.

Because the Aurelia uses tube-type radial tires in these available fitments, long static storage also makes it worth checking for slow air loss before and after storage periods. If the car will sit for an extended season, periodic rolling or supporting the vehicle appropriately can reduce stress on the casing. Good storage habits preserve sidewall appearance as well as driving confidence.

Tires on a 1950 Lancia should be judged by age and condition more than by mileage, because collector cars often accumulate very few miles. A sensible rule is to begin close inspection and professional evaluation once tires are around five to seven years old, then consider replacement as they approach ten years regardless of remaining tread. The DOT date code on the tire helps establish age.

That approach matters on an Aurelia because a lightly used tire can still harden, crack, or lose reliability with time. Sidewalls, bead areas, and the tire's ability to hold pressure tell a more useful story than tread depth alone. If the car has spent time in sunlight, damp storage, or long static display, age-related replacement becomes even more important.

Tires on a 1950 Lancia deserve a quick inspection before every drive and a more thorough one before any extended outing. Check inflation, sidewall cracking, cuts, bulges, irregular wear, and any sign that the tire is losing air between drives. Since the listed Aurelia fitments are tube-type, valve stems and tube-related leakage deserve close attention as well.

That routine is especially important on a collector car that may sit for long periods between uses. Problems often show up gradually, and catching them early is easier than diagnosing them on the roadside. If the steering feel changes, the car develops a pull, or one tire needs repeated inflation, inspect immediately rather than assuming it is simply a normal quirk of an older car.

The 1950 Lancia Aurelia belongs to an era when Lancia was closely associated with advanced European engineering, and radial millimetric fitment is consistent with that character. In this year-and-make grouping, the Aurelia is associated with 165-400 and 165R400 radial sizes on 400mm rims. The available products are Michelin radial offerings, but confirming exact market- or body-specific original fitment is still best done against factory literature and marque expertise.

For restoration purposes, the safest approach is to match the tire's size format, radial construction, and overall visual presentation to the period of the car. Avoid assuming that any later inch-based substitute is equivalent simply because it looks close. If you are aiming for exact historical fidelity, compare your chassis and wheel details with period sources or a Lancia specialist before final selection.

Correct tire fitment matters on a 1950 Lancia because judges and knowledgeable enthusiasts often notice tire size, construction type, and sidewall presentation immediately. On an Aurelia, a proper 400mm millimetric radial fitment aligns with the car's engineering character, while an obviously modern substitute or the wrong sidewall appearance can detract from authenticity even if the tire physically mounts.

That does not mean every event applies the same standard, but originality-minded judging usually rewards details that look and read correctly. For a show-focused Aurelia, check whether blackwall or narrow whitewall presentation suits your target event and the car's historical presentation. Marque clubs and event rulebooks are the best places to confirm how strict those standards will be.

On a 1950 Lancia Aurelia, Michelin X Radial and Michelin X-Stop in 165R400 differ in appearance and approved wheel-width range more than in basic size. The X Radial is a narrow whitewall listed for 6.0 to 7.0 inch rims and weighs 17 pounds, while the X-Stop is a blackwall listed for 4.50 to 6.00 inch rims and weighs 20 pounds. Both are radial tube-type tires with the same 87S marking.

From an authenticity standpoint, that gives you two distinct restoration paths. One favors a cleaner blackwall look often associated with understated European presentation, while the other introduces a narrow whitewall for a more formal visual effect. The right answer depends on your wheel width first and your historical target second, so treat both fit and appearance as part of the restoration decision.

Available 1950 Lancia Aurelia tires in 165R400 carry an S speed rating, which corresponds to a 112 mph ceiling. That is well beyond normal U.S. highway speeds, and radial construction supports stable road manners compared with older tire designs from earlier eras. In real use, the Aurelia's overall mechanical condition matters just as much as the tire's speed symbol.

A collector car's brakes, suspension, steering condition, wheel integrity, and alignment usually determine long-drive confidence more than the tire's catalog speed ceiling. Safe highway use starts with age-free tires in sound condition, correct inflation, and wheels that meet the tire's approved width range. If the car has been dormant, bring it back into service gradually before planning sustained highway travel.

The available 1950 Lancia Aurelia products shown here include an 87S service description, but no universal inflation figure should be assumed from size alone. Tire pressure on a collector car should follow the vehicle manufacturer's recommended operating pressure where appropriate, then be checked against the tire maker's rated limits for the exact product selected. Pressure should never be transferred casually from one tire size or product line to another.

That matters because two tires with the same nominal size can differ in casing design, intended wheel-width range, and operating characteristics. On an Aurelia, start with the factory guidance for the car and wheel combination, then confirm that the tire you chose is being used within its own specifications. Proper pressure supports wear, handling balance, and tube life on these 400mm fitments.

Before a longer drive in a 1950 Lancia, inspect each tire for cracking, cuts, bulges, uneven wear, and pressure loss, and make sure the valve stems are in good condition. Since the listed Aurelia fitments are tube-type, include the spare in that inspection and verify that it is inflated and serviceable. A tire that looks acceptable in the garage can still be unsuitable for sustained road use if it is aged or damaged.

Tires are only one part of the pre-drive check on an older Lancia, so also look over brakes, wheel fasteners, steering response, fluid levels, and basic electrical function. The goal is to catch age-related issues before they turn into a roadside problem. A few careful minutes in the garage are far more valuable than assuming a low-mile collector car is automatically ready for distance.