1959 Morgan Series Tires

The 1959 Morgan Series uses two primary tire sizes: 135R15 in radial construction and 500-15 in bias-ply construction. Both sizes are associated with the model and both use a 15-inch rim, so the fitment question is mainly about which construction and wheel setup the car is using rather than choosing between different wheel diameters.

The practical next step is to inspect the tires and wheels already on the car before ordering replacements. A Morgan that has been kept closer to a traditional setup may still use 500-15 bias-ply tires, while another car may already be running 135R15 radials. Wheel width, overall clearance, and the car's intended use should all be confirmed before changing from one setup to the other.

The 1959 Morgan Series uses a 15-inch rim with both of its supported tire sizes. That applies whether the car is fitted with the 135R15 radial size or the 500-15 bias-ply size, so rim diameter remains consistent across the covered fitments.

Rim diameter is only part of the fitment picture on a small, narrow-tired sports car like this. It is still important to verify actual wheel width before selecting a tire, especially if the car has been changed over to different wheels at some point. Matching the tire to the wheel's width range helps preserve proper tire shape, clearance, and overall fitment.

The 1959 Morgan Series II uses the same tire-size choices found at the model level: 135R15 in radial construction and 500-15 in bias-ply construction. In other words, the sub-model does not introduce a separate rim diameter or a unique third size that changes the basic tire-search process.

What still matters is confirming which setup the individual car actually wears today. A Series II fitted with 500-15 bias-ply tires calls for a different selection approach than one already running 135R15 radials, even though both are valid 15-inch fitments. Checking the mounted tire, wheel width, and intended appearance goal keeps the replacement decision much cleaner.

500-15 is a bias-ply tire size for the 1959 Morgan Series. It uses the older numeric sizing format, with 5.00 indicating the nominal section width family and 15 indicating rim diameter, and the available products in this fitment are bias-ply offerings rather than radials.

That makes 500-15 the more traditional-looking choice on this Morgan, especially for owners who want a distinctly vintage presentation. Before moving away from it, confirm whether the car's wheels are suited to a different construction and whether the change would affect the appearance or setup you want. Construction, wheel width, and clearance all deserve a look before any conversion.

Both approaches exist for the 1959 Morgan Series, but they serve different goals. A 500-15 bias-ply tire keeps the car in a more traditional sizing and construction style, while a 135R15 radial gives the Morgan a narrow Euro-metric radial option on the same 15-inch rim diameter.

The better choice depends on how the car is being presented and driven. A restoration-oriented owner may prefer the visual character of a bias-ply tire, while a driver-focused owner may want to stay with the car's current radial setup. The safest path is to confirm wheel width and clearances first, then choose the construction that matches the vehicle's setup and use.

Start by confirming the actual wheel diameter and width, then compare the car's current tire size to the intended radial size of 135R15. The 1959 Morgan Series uses 15-inch rims in either case, but that does not make every wheel automatically suitable for every construction or profile.

A proper conversion check should also include steering clearance, fender clearance, suspension condition, and the car's intended road use. Small sports cars can be sensitive to tire width and wheel dimensions, so the installed setup matters more than the model name alone. Looking at the current wheel, mounted tire, and available space around the tire helps avoid unwanted surprises.

Start with the actual size and construction the car is using now, because the 1959 Morgan Series can be fitted with either 135R15 radial tires or 500-15 bias-ply tires. Both use a 15-inch rim, but they reflect different tire formats, different visual character, and different product assortments.

After confirming size, compare the details that shape the buying decision: wheel-width compatibility, sidewall style, tire series, brand, and how the car will be used. A Morgan kept close to a traditional appearance may point toward bias-ply products, while a car already set up for narrow radials may call for 135R15 choices. The right match comes from balancing fitment, appearance, and use.

Sidewall style depends on the tire size you choose. In 135R15 radial form, the available options are blackwall tires. In 500-15 bias-ply form, both blackwall and wide whitewall choices are available, giving the Morgan owner a more traditional appearance decision within the bias-ply side of the fitment.

That matters because sidewall treatment has a strong effect on how a small vintage sports car presents visually. A blackwall usually keeps the look restrained and purposeful, while a wide whitewall pushes the car toward a more decorative period-style presentation. The best choice depends on the way the car is being restored, displayed, or driven rather than on fitment alone.

The available brands for the 1959 Morgan Series are Michelin, Firestone, and BFGoodrich. Michelin and Firestone appear in the 135R15 radial size, while BFGoodrich and Firestone appear in the 500-15 bias-ply size, so the brand field changes depending on which tire format the car is using.

Brand is only one part of the selection process on this Morgan. It helps to compare each tire by construction, sidewall style, tire series, and wheel-width suitability before deciding. A buyer looking at 135R15 radial products is making a different choice than someone searching 500-15 bias-ply tires, even when Firestone appears in both groups.

A period-style 1959 Morgan Series usually starts with the 500-15 bias-ply size, because it carries the older numeric format and a more traditional construction than the 135R15 radial option. Within that size, blackwall and wide whitewall versions are available, so the appearance can remain understated or become more visually prominent.

The right choice depends on the character you want the car to project and how exact the restoration needs to be. For a more historically grounded look, many owners begin by keeping the original-style construction family rather than changing to a radial. If strict originality matters, compare your selection against marque references and vehicle-specific restoration documentation before deciding.

Tire construction changes the visual impression of a restored 1959 Morgan Series more than many buyers expect. A 500-15 bias-ply tire gives the car a distinctly vintage presentation tied to older sizing practice, while a 135R15 radial introduces a later-style metric format and a more modern construction, even though both fit 15-inch rims.

That difference matters on a narrow-bodied sports car where tire profile and sidewall presence are easy to notice. Owners focused on display or preservation often weigh construction almost as heavily as size, while drivers may accept a different appearance in exchange for a radial setup. Matching the tire to the restoration goal usually leads to a more satisfying result than choosing by size alone.

Yes, modifications can affect tire fitment on a 1959 Morgan Series even when the tire size itself looks correct on paper. Changes to wheel width, wheel design, ride height, springs, or body clearance can alter how a 135R15 radial or 500-15 bias-ply tire sits and moves within the available space.

A modified car should be checked at the wheel and tire level rather than by model name alone. Inspect rim diameter, actual wheel width, steering clearance, and fender clearance before replacing tires or changing construction. On a light, compact sports car, small hardware changes can influence fitment more quickly than they would on a larger vehicle.

Before road use, inspect the wheel condition, confirm correct tire pressure, and make sure each tire is seated properly on the rim. It also helps to look over suspension and steering components, since worn bushings, loose hardware, or alignment issues can affect how a narrow tire behaves once the car is back on the road.

A quick clearance check is especially important after mounting a different size or switching between bias-ply and radial construction. Turn the steering through its range and look for contact at the fender, chassis, or suspension. After the first drives, recheck pressure and look for any signs of rubbing, unusual wear, or air loss.

Collector-car tires on a 1959 Morgan Series should be maintained with regular pressure checks, visual inspections, and proper storage habits. Even if the car is driven sparingly, age and environment still matter, so the sidewalls and tread should be watched for cracking, cuts, bulges, flat spotting, or any sign that the tire is losing air.

Storage conditions make a real difference for a lightly used Morgan. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone-producing equipment helps preserve the tires between drives. It is also wise to inspect the tires before every outing, because collector vehicles often spend more time sitting than accumulating enough miles to reveal problems gradually.