1964 Morgan 4-4 Series Tires

The 1964 Morgan 4-4 Series is associated with two primary tire sizes: 560-15 in bias-ply construction and 155R15 in radial construction. Both sizes use a 15-inch rim, so the fitment question is not just about diameter but also about which construction style suits the car and its intended use.

A 560-15 keeps the car in a traditional numeric bias-ply format, while 155R15 moves to a Euro-metric radial format. Before choosing between them, confirm the actual wheel width on the car and decide whether the priority is period-style appearance, radial road manners, or staying close to an established original-type presentation.

The 1964 Morgan 4-4 Series uses a 15-inch rim with both of its associated tire sizes. That applies whether the car is fitted with a 560-15 bias-ply tire or a 155R15 radial, so rim diameter stays consistent even though the sizing systems and tire constructions differ.

Diameter is only part of the wheel question on a vintage sports car. It is also worth confirming the wheel width before selecting a tire, especially when moving between bias-ply and radial construction or comparing different radial series, because compatibility and the final tire profile can change with the wheel actually mounted on the car.

The 1964 Morgan 4-4 Series Base is associated with the same two fitment paths used on this vehicle page: 560-15 bias-ply and 155R15 radial. That means the sub-model itself does not introduce a different diameter or a separate fitment family beyond those two established 15-inch choices.

The practical decision for a Base model owner is choosing which path matches the car’s purpose. A bias-ply selection leans toward traditional presentation, while a radial keeps the car in a narrow 15-inch fitment with a more modern construction style. Wheel width, suspension condition, and body clearance should still be checked on the actual car.

For the 1964 Morgan 4-4 Series, 560-15 is a bias-ply tire size. It uses the older numeric sizing format common to many vintage vehicles, and it is separate from the car’s 155R15 radial fitment. In this application, 560-15 represents the traditional construction choice rather than a radial-format tire.

That matters because construction changes both the buying process and the car’s visual character. Within 560-15, choices include blackwall, narrow whitewall, and wide whitewall options across several bias-ply series. Anyone comparing 560-15 with a radial alternative should verify wheel width and overall fitment rather than assuming every 15-inch tire behaves the same way.

Radial equivalents for 560-15 include 155R15 and 560R15. The 155R15 is an 80-series metric radial equivalent, while 560R15 is a bias-look radial equivalent intended to keep a more traditional visual impression than a modern-looking radial size code would suggest.

These equivalents give a 1964 Morgan 4-4 Series owner two different radial-format directions, but neither should be treated as automatic interchangeability. A recommended rim-width range of 4 to 5 inches applies to the equivalent comparison, and the actual wheel setup, tire dimensions, steering clearance, and fender clearance all deserve a careful check before making the change.

Either approach can suit a 1964 Morgan 4-4 Series, because both a 560-15 bias-ply and a 155R15 radial are established fitment paths for this vehicle. The choice depends less on whether one is universally better and more on whether the car is being kept closer to a traditional presentation or set up around a radial construction.

Bias-ply tires usually make the most sense when period-style appearance is the priority, especially with blackwall or whitewall options in the correct size family. Radials become the stronger candidate when the goal is to stay within a narrow 15-inch fitment while using radial construction. Either way, confirm wheel width and inspect suspension and steering clearance on the car itself.

Start with the fact that 560-15 is the bias-ply fitment path for the 1964 Morgan 4-4 Series. From there, the meaningful differences are sidewall style, brand, tire series, rim-width specification, and whether the goal is a traditional road-going presentation or a more specialized option such as a front-runner style tire.

Available 560-15 choices include blackwall, narrow whitewall, and wide whitewall versions from Firestone, US Royal, Coker Classic, and Pro-Trac. Matching the sidewall treatment to the car’s finish matters visually, but wheel compatibility matters just as much. Check the actual wheel width on the car, then compare the intended appearance and use before settling on one bias-ply option.

The 1964 Morgan 4-4 Series has tire choices from Firestone, Michelin, Avon, Vredestein, US Royal, Coker Classic, and Pro-Trac. Those brands span both of the vehicle’s fitment directions, with 155R15 radial offerings and 560-15 bias-ply offerings available depending on whether the car is being kept on a radial or traditional bias-ply setup.

Brand alone is not the full decision on a vintage sports car. It helps to compare each tire by size, construction, series, sidewall treatment, and wheel-width suitability instead of focusing on the name first. That approach keeps the 1964 Morgan 4-4 Series centered on correct fitment and overall presentation rather than chasing a brand without considering the setup.

Sidewall choices for the 1964 Morgan 4-4 Series include blackwall, narrow whitewall, and wide whitewall, depending on the tire size and construction selected. The 155R15 radial offerings are blackwall, while the 560-15 bias-ply range adds both narrow and wide whitewall presentations alongside blackwall options.

That makes sidewall style an important appearance decision, especially on a traditional sports car where tire proportions are easy to see. A blackwall usually gives the cleanest understated look, while a whitewall shifts the visual character more strongly. The best choice is the one that complements the car’s restoration direction while staying within the correct 560-15 or 155R15 fitment path.

A 560-15 bias-ply tire is the natural starting point for a period-style 1964 Morgan 4-4 Series because it keeps the car in its traditional numeric bias-ply fitment family. Blackwall, narrow whitewall, and wide whitewall versions are available, so the appearance can be tailored without stepping outside that classic construction type.

Choosing among those options depends on how strictly the car is being restored and the visual effect desired once the wheels are mounted. When exact originality matters, compare the final tire choice with marque-club guidance, period photography, or other vehicle-specific references. That helps separate a generally appropriate period-style look from a truly precise restoration decision.

Tire construction has a visible effect on a restored 1964 Morgan 4-4 Series because the car’s light proportions and narrow wheel openings make sidewall shape and overall stance easy to notice. A 560-15 bias-ply keeps a more traditional visual language, while a 155R15 radial introduces a different construction style even though it stays within the correct 15-inch fitment family.

The appearance difference is not only about blackwall versus whitewall. It is also about the way the tire fills the wheel area and supports the car’s period character. Owners trying to preserve a strong vintage presentation often begin with the bias-ply option, while those wanting radial construction may consider either 155R15 or a 560R15 bias-look radial after checking wheel compatibility.

Yes, modifications can affect tire fitment on a 1964 Morgan 4-4 Series even when the selected tire is one of the correct associated sizes. Changes to wheel width, wheel design, suspension height, spring condition, steering components, or body clearance can all influence how a 560-15 or 155R15 tire sits and moves on the car.

A modified car should be checked as an actual physical setup, not just by size code. Turning clearance at full lock, fender clearance through suspension travel, and the relationship between tire section width and wheel width all matter. That is especially important when converting between bias-ply and radial construction, because the wheel may suit one setup better than the other.

Before driving a 1964 Morgan 4-4 Series on new tires, inspect wheel condition, valve stems or tubes as applicable, tire pressure, lug hardware, and basic clearance around the fenders and steering components. It is also wise to look over suspension and steering parts so the new tires are not being asked to compensate for worn mechanical pieces.

A short, careful road test helps confirm that the car tracks cleanly and that nothing rubs under turning or modest suspension movement. Collector cars often spend long periods parked, so the first drive is also a good time to watch for vibration, air loss, or any sign that the wheel-and-tire combination needs rechecking after installation.

Collector-car tire maintenance starts with regular pressure checks, visual inspection, and clean storage habits whether the 1964 Morgan 4-4 Series is running 560-15 bias-ply tires or 155R15 radials. The tires should be watched for cracking, bulges, cuts, uneven wear, and slow air loss, especially on a car that may sit longer than a modern daily driver.

Storage conditions matter because heat, sunlight, moisture, and ozone exposure can age tires even when mileage stays low. Rolling the car occasionally and inspecting the tread and sidewalls before each driving season helps catch problems early. On a lightweight vintage sports car, routine checks are one of the simplest ways to preserve both road manners and tire life.