1955 Morgan 2+4 Seater Tires

The 1955 Morgan 2+4 Seater uses two primary tire sizes: 525-16 and 550-16. Both are bias-ply sizes for 16-inch rims, and the covered Base sub-model is associated with both of them rather than with one exclusive fitment.

That means the correct choice depends on the actual wheel-and-tire setup on the individual car. A Morgan that has been restored, re-wheeled, or simply fitted differently over time may already be set up around one of those sizes, so checking the installed wheel width and the size already on the car is the most practical way to avoid selecting the wrong tire.

Both primary tire sizes for the 1955 Morgan 2+4 Seater are built for 16-inch rims. That applies to 525-16 and 550-16, so the wheel diameter remains consistent even though the car is associated with two different numeric bias-ply tire widths.

Rim diameter is only one part of fitment, though. Before choosing a tire, it still makes sense to confirm the wheel width on the car, especially because the available products in these sizes do not all share the same rim-width range. That extra check helps narrow the choice between the two sizes and between the specific tires offered within each size.

On a 1955 Morgan 2+4 Seater, 525-16 is a numeric bias-ply size. The 5.25 figure refers to the tire's nominal section width in inches, while the 16 refers to the wheel diameter in inches.

This older sizing system is common on vintage and early postwar vehicles, so it reads differently from modern metric radial sizes. The important takeaway is that 525-16 is not just a diameter number with a random prefix; it describes a narrow, traditional bias-ply fitment that should be matched to the correct 16-inch wheel and compared against the car's existing setup before making a change.

Start with the actual size the car is set up to use, because the 1955 Morgan 2+4 Seater is associated with both 525-16 and 550-16. Both are 16-inch bias-ply fitments, but they represent different nominal widths and should not be treated as interchangeable without checking the wheel setup.

Once the size is confirmed, compare the available sidewall style, brand, tire series, and wheel-width suitability within that size. A narrower blackwall presentation may suit one restoration approach, while a 550-16 whitewall may suit another. Keeping the tire choice aligned with the car's wheels, appearance goals, and intended road use usually matters more than simply picking the most visually appealing option.

The available sidewall styles for the 1955 Morgan 2+4 Seater include blackwall and wide whitewall. Blackwall options appear in both 525-16 and 550-16, while wide whitewall choices are available in 550-16.

That gives the car owner a meaningful appearance decision even while staying within correct vintage-style bias-ply sizing. A blackwall usually preserves a simpler sporting look, while a wide whitewall changes the visual character more noticeably. The best choice depends on how the car is being presented and whether the selected sidewall treatment is available in the exact size and wheel-width range the car requires.

Tires for the 1955 Morgan 2+4 Seater are available from Deka, Excelsior, Avon, BFGoodrich, and Firestone. Brand availability depends on size, with Deka appearing in 525-16 and the broader brand mix appearing in 550-16.

The practical difference is not simply the brand name on the sidewall. Each option should be compared by the correct tire size first, then by sidewall treatment, tire series, and wheel-width suitability where stated. That approach helps keep the choice grounded in fitment and appearance rather than turning the decision into a brand preference that ignores how the tire will actually suit the Morgan.

A period-style 1955 Morgan 2+4 Seater should begin with one of its proper bias-ply fitments, either 525-16 or 550-16, depending on the wheel and tire setup already on the car. That keeps the construction type in line with the Morgan's traditional mid-1950s character.

After size is confirmed, the appearance decision becomes more specific. Blackwall tires maintain a restrained sporting look, while a wide whitewall in 550-16 creates a different vintage presentation. For owners pursuing exact historical accuracy, the safest approach is to compare the car's restoration goals with marque references, period photos, and other vehicle-specific documentation before settling on a sidewall treatment.

Correct tire fitment matters a great deal on a 1955 Morgan 2+4 Seater because these cars rely heavily on proportion and stance for their visual character. Using the proper 16-inch bias-ply sizing helps preserve the traditional look that suits the body, fenders, and narrow-wheel setup.

Fitment also affects how authentic the finished restoration feels. A tire that is too wide, mismatched in sidewall style, or unsuitable for the wheel can distract from an otherwise well-restored car. Even when choosing between acceptable vintage-style options, it is worth checking the installed wheels carefully so the finished appearance stays coherent rather than looking casually assembled.

Yes. Modifications can affect tire fitment on a 1955 Morgan 2+4 Seater even when the tire size itself appears familiar. Changes such as aftermarket wheels, altered wheel width, suspension work, ride-height changes, or body adjustments can all influence which of the two primary sizes is more appropriate.

A car that has been changed from its earlier setup should be checked carefully for wheel diameter, wheel width, and available clearance at steering lock and under suspension movement. That matters just as much as the printed tire size, because a vintage Morgan often has less margin for casual fitment changes than a more modern vehicle with larger wheel openings.

Before driving a 1955 Morgan 2+4 Seater on new tires, inspect the wheels, valve stems, and the overall condition of the mounting surfaces. It also makes sense to confirm that the chosen tire size matches the wheel diameter and width already on the car.

A short test drive should be preceded by basic clearance checks at the front and rear, especially if the Morgan has had any wheel or suspension changes over the years. After the tires are installed, monitor inflation, look for any rubbing, and recheck the tires for proper seating and air retention so the car is ready for regular road use rather than just static display.

Collector-car tires in 525-16 or 550-16 sizing should be maintained with regular pressure checks, visual inspections, and careful storage habits. Even when a 1955 Morgan 2+4 Seater is driven infrequently, its bias-ply tires still need attention for cracking, cuts, bulges, uneven wear, and gradual air loss.

Storage conditions matter more than many owners expect. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires between drives. It is also wise to inspect them before any longer outing, since a lightly used collector car can accumulate age-related tire issues even when tread depth still looks acceptable.