Morgan Plus 4 Tires

Morgan Plus 4 fitments in this year range include 500-16 for 1957-1958, 155R15 and 560-15 for 1959-1968, and 165R15 plus 590-15 for 1964-1968. The 500-16 size uses a 16-inch rim. The 155R15, 560-15, 165R15, and 590-15 sizes all use 15-inch rims, with listed products covering several rim-width ranges depending on the specific tire.

The practical takeaway is that year alone does not always settle the question on a Morgan Plus 4. Early cars need the 16-inch fitment checked first, while later cars may need you to confirm whether the car is staying with a traditional bias-ply setup or has a radial-size application. Wheel width, sidewall preference, and restoration goals can all help narrow the final choice.

On a Morgan Plus 4, 500-16 is an older numeric bias-ply tire size used on 1957 and 1958 applications. The 500 indicates a nominal 5.00-inch section width, while the 16 indicates the rim diameter in inches. The listed 500-16 product fits a 16-inch wheel and a 4.00 to 5.00 inch rim width range.

That makes 500-16 important as an early Plus 4 fitment rather than a later interchangeable option. If a 1957 or 1958 Morgan Plus 4 has been altered over the years, measure the wheel and confirm the stamping before selecting a replacement. Because the available product is bias-ply, plan around the driving character and service requirements that go with a tube-type vintage setup.

A 1964 Morgan Plus 4 can show 155R15, 560-15, 165R15, and 590-15 because that year includes both radial and bias-ply fitment paths on 15-inch wheels. The radial sizes are 155R15 and 165R15, while the bias-ply sizes are 560-15 and 590-15. The split is not a wheel-diameter change within that year; it is a construction and size-choice split on the same 15-inch wheel diameter.

That means a 1964 Morgan Plus 4 owner should verify more than the year tag. Check the wheel width, look at the stance and clearance around the body and fenders, and decide whether the car is being kept period-correct on bias-ply tires or driven on radial construction. Those details will point you toward the narrower or wider option within the correct 15-inch family.

Morgan Plus 4 uses two rim diameters across the years covered here. The 1957-1958 fitment, 500-16, uses a 16-inch rim, while every listed size from 1959 through 1968 uses a 15-inch rim: 155R15, 560-15, 165R15, and 590-15. That makes 1959 the change point from the earlier 16-inch setup to the later 15-inch wheel diameter.

This is the first dimension to verify on the car itself because a Plus 4 can look broadly similar across these years while wearing different wheels. If the vehicle has had wheels changed during restoration or ownership, the actual rim diameter matters more than the model year alone. Once the wheel diameter is confirmed, the remaining decision becomes bias-ply versus radial and narrow versus wider section width.

Morgan Plus 4 has both bias-ply and radial options in the years covered here. Bias-ply choices include 500-16, 560-15, and 590-15, while radial choices include 155R15 and 165R15. The best choice depends on whether the priority is preserving period-correct appearance and traditional handling feel, or using a radial construction that reflects later tire development within the same 15-inch fitment range.

A restoration-minded owner usually starts by deciding what role the car will serve. Show presentation, factory-era character, and original-style proportions often point toward bias-ply, while regular road use can lead buyers toward radial sizes where they are listed for the same years. On a Morgan Plus 4 with multiple listed sizes, construction choice should be made alongside a careful check of wheel width and body clearance.

Yes, a Morgan Plus 4 can feel different on radial tires because the available radial fitments, 155R15 and 165R15, are a different construction from the listed bias-ply sizes. Radials and bias-ply tires flex and react differently, and that changes the way an older sports car responds to steering input, road surface, and cornering load. The effect is especially relevant on a light, traditionally built car such as Morgan Plus 4.

That does not make one choice universally right for every owner. A driver who wants the car to feel closer to its period character may prefer the traditional behavior of a bias-ply setup, while another owner may value the feel of a later radial fitment. If consistency matters, choose a complete matched set in the same construction and size family rather than blending period style in one axle and modern response in the other.

Morgan Plus 4 fitments include both bias-ply and radial sizes, but mixing those constructions on one car is generally a poor practice. The listed 15-inch options show that the same years can be fitted either way, yet the tires are built to behave differently under load and in steering response. A mixed setup can make the car feel inconsistent and harder to predict.

The sensible approach is to keep all four tires in the same construction family and in a matched size set appropriate to the wheel diameter on the car. If the goal is an original-looking restoration, stay within the bias-ply choices. If the car is already configured around a radial-size fitment, use a full radial set and keep wheel width, section width, and sidewall style consistent from corner to corner.

A 1965 Morgan Plus 4 can use 155R15, 560-15, 165R15, or 590-15, all on 15-inch rims. The correct choice depends on the wheel width on the car, whether the car is set up for radial or bias-ply construction, and whether the intended look is narrower or wider within the listed range. The year identifies the correct family, but it does not by itself settle the exact tire.

Start with the wheel itself: confirm the 15-inch diameter, then check the rim width and compare it with the published range for the tire you are considering. After that, look at the car's current stance, any restoration records, and the handling character you want. On a Morgan Plus 4, those details usually separate a proper 155R15 or 165R15 radial choice from a 560-15 or 590-15 bias-ply choice.

Morgan Plus 4 tires in these sizes are available in blackwall, narrow whitewall, and wide whitewall forms, depending on the size and series. Blackwall choices appear across all five sizes. Narrow and wide whitewall options are especially common in 560-15 and 165R15, and there is also a wide whitewall choice in 590-15.

Sidewall selection is part fitment and part presentation. A blackwall usually suits the sporting, understated character many owners want on a Plus 4, while whitewall variants can shift the look toward a more stylized period appearance. When choosing among them, make sure the preferred sidewall treatment is offered in the exact size and construction family that matches the wheel diameter and setup of the car.

Morgan Plus 4 tires in the listed sizes come from Firestone, Michelin, Avon, Vredestein, US Royal, Coker Classic, Pro-Trac, American Classic, and BFGoodrich. Brand availability varies by size. Some sizes are concentrated in one or two brands, while 165R15 in particular offers the broadest mix of makers and sidewall treatments.

Brand choice should come after the fitment basics are settled. Once the correct size, wheel diameter, and construction type are identified, the remaining differences usually involve tread series, sidewall style, and the look you want the car to present. On a Morgan Plus 4, it is wise to choose a brand within the correct size family rather than forcing a preferred brand into an unsuitable fitment.

Morgan Plus 4 tires are offered in several distinct series, including Dirt Track, F560 Radial, Michelin X, Michelin XAS, Michelin XAS-FF, CR6ZZ, Snow Classic, Sprint Classic, Firestone Classic Bias Ply, US Royal Classic Bias Ply, Street Pro Front Runner, Coker Classic Radial, Silvertown Radial, Michelin XZX, Star Series, Silvertown Classic Bias Ply, and Turbospeed Mk4. Those series represent different construction approaches, tread intentions, and sidewall treatments across the listed sizes.

The practical way to use series names is to separate purpose from fitment. A classic bias-ply series preserves an earlier look and feel, a road radial series suits later radial-style fitment, and specialty names such as Snow Classic or Front Runner point toward a more specific role. On a Morgan Plus 4, decide the correct size and construction family first, then use the series name to refine the car's appearance and intended use.

A Morgan Plus 4 should be stored clean, dry, and away from direct sunlight, ozone sources, and wide temperature swings. Keep the tires properly inflated for the tire type fitted, and avoid leaving the car parked for long periods on damp concrete or contaminated surfaces. If the car will sit for extended periods, rolling it occasionally or supporting it to reduce static loading can help prevent flat-spotting and sidewall stress.

Collector-car storage is as much about consistency as climate. A Plus 4 often sees low annual mileage, which means time can age the tires faster than wear. Check inflation before and after storage periods, keep oils and solvents away from the rubber, and inspect the sidewalls for cracking or distortion whenever the car comes back into service for touring, show use, or weekend driving.

Tires on a Morgan Plus 4 should be inspected before every drive and more thoroughly at regular service intervals. Look for cuts, cracking, sidewall deformation, uneven wear, embedded debris, and any sign that the tire is not seated or wearing evenly on the wheel. On bias-ply applications, also pay attention to the condition of the tube-type setup and the general age-related stiffness that can develop on a collector car.

Frequent inspection matters because a Plus 4 is light, responsive, and often used intermittently rather than daily. Small problems can go unnoticed when a car spends long periods parked, then reappears for a spirited drive. A quick pre-drive walkaround and a more deliberate inspection during routine maintenance help catch issues early, especially when the car is running vintage-size tires with narrow tread widths and traditional sidewall construction.

A Morgan Plus 4 tire should be replaced when age, cracking, hardening, sidewall separation, impact damage, or persistent vibration shows that the structure is no longer trustworthy, even if the tread still looks usable. Collector-car tires often age out before they wear out. That is especially true on low-mileage cars where visual condition can seem better than the internal condition really is.

The best practice is to judge a Plus 4 tire by condition and age as much as tread depth. If the car has spent years parked, if the sidewalls feel stiff, or if there is any doubt about the history of the tires, replacement is usually wiser than trying to stretch a few more seasons out of them. Period appearance is important, but sound rubber matters more once the car is back on the road.

Morgan Plus 4 uses more than one period-appropriate size and construction across the years covered here. Early cars are listed with 500-16, while later years move to 15-inch fitments that include both bias-ply sizes such as 560-15 and 590-15 and radial sizes such as 155R15 and 165R15. The available series show that more than one historically suitable approach exists within this production span.

For a strict restoration, the best reference is the individual car rather than the model name alone. Chassis year, wheel diameter, wheel width, surviving paperwork, and marque-club knowledge should all be weighed before final selection. A Morgan Plus 4 restored for judging may need a different answer from one restored for touring, even when both fall within the same general year group.

Yes, correct tire fitment can affect both presentation and credibility on a Morgan Plus 4. Size, construction type, sidewall style, and overall stance all influence whether the car looks appropriate for its year and character. A car wearing a visibly incorrect wheel diameter or an out-of-period sidewall treatment can stand out immediately to knowledgeable judges and experienced enthusiasts.

That does not mean every owner must choose the same answer. Some restorations are judged for authenticity, while others are built for reliable road use with sympathetic updates. If value and concours correctness are priorities, align the tire with the specific year, wheel diameter, and restoration objective, and use marque-club references to support decisions where multiple listed sizes overlap in the same production period.

Morgan Plus 4 restoration choices here include blackwall, narrow whitewall, and wide whitewall depending on size and series. Blackwall appears across the full spread of available sizes and is the most consistently available sporting presentation. Narrow and wide whitewalls are offered in selected 560-15, 165R15, and 590-15 products for owners pursuing a different period look.

The correct sidewall style depends on how the individual car is being interpreted. A restrained sports-car restoration often points naturally toward blackwall, while a more stylized period presentation may justify a narrow or wider whitewall if the chosen size supports it. Before deciding, match the sidewall treatment to the wheel diameter and tire construction that belong on that specific Morgan Plus 4 rather than choosing appearance in isolation.

Morgan Plus 4 tires can be suitable for public-road use when the correct size, wheel diameter, construction type, and overall condition are all in order. The key distinction is not simply brand or tread, but whether the tire matches the car's wheel setup and intended use. A fresh, correctly fitted radial or bias-ply tire is a very different proposition from an aged or mismatched set on the same car.

Before using a Plus 4 regularly, inspect the entire running gear and treat the tires as part of the car's broader mechanical system. Proper inflation, even wear, sound tubes where required, and clearances at full steering lock all matter on a narrow-bodied traditional sports car. Road use should match the condition of the tires and the general state of the car, not simply the remaining tread depth.

Before driving a Morgan Plus 4, check tire pressure, visible sidewall condition, tread condition, and the wheel diameter and size match if the car has recently changed hands or undergone restoration. On bias-ply sizes such as 500-16, 560-15, and 590-15, also make sure the tube-type arrangement is in good order. If the car sits for long periods, look closely for flat-spotting, cracking, or signs of age-related hardening.

A brief pre-drive routine can prevent many of the problems collector cars encounter after storage. Walk around the car, confirm there is no contact issue at the arches or suspension, and pay attention to steering feel in the first few miles. A Morgan Plus 4 communicates tire issues quickly, so any shake, tramlining, or pull should be taken as a reason to stop and inspect rather than drive through it.

A Morgan Plus 4 should be driven at speeds that respect the construction, age, and condition of the tires actually fitted to it. Original-style bias-ply tires and period-size reproductions invite a more measured pace than many modern drivers expect from a sports car, while radial fitments can offer a different road feel within the listed size range. Condition matters as much as construction, especially on low-use collector cars.

The wise approach is to build speed gradually and judge the car by stability, steering response, and heat buildup rather than by performance potential alone. Even a well-sorted Plus 4 is still a traditionally built machine with narrow vintage-size tires. If there is any uncertainty about age, balance, tube condition, or general roadworthiness, keep speeds conservative until the car and its tires have been fully evaluated.