Kaiser Manhattan Tires

The listed tire size for the 1955 Kaiser Manhattan is 670-15. Every available product in this fitment uses a 15-inch rim diameter, and the offerings are bias-ply tires in several visual styles, including blackwall, narrow whitewall, and wide whitewall. Most listed rim-width recommendations center around 4.50 to 5.00 inches, with a few products extending slightly outside that range.

That means the main fitment job on a Kaiser Manhattan is verifying that the car still carries 15-inch wheels and then choosing the sidewall style that suits the restoration or driving goal. If the car has had wheels changed over the years, measure the rim and compare it with the tire’s rim-width guidance before making a final selection.

On a Kaiser Manhattan, 670-15 is a numeric bias-ply size. The 670 identifies the tire’s nominal section-width class in the older inch-based bias-ply system, while 15 indicates the wheel diameter in inches. All of the Kaiser Manhattan products listed in this size are bias-ply construction rather than modern metric radial sizing.

That older size code is important because it does not translate directly by appearance to a modern P-metric tire label. If you are trying to preserve the original stance, steering feel, and sidewall look of a 1955 Kaiser Manhattan, staying with the correct 670-15 bias-ply format is usually the right starting point.

The available Kaiser Manhattan tires in 670-15 are bias-ply products, and a tube is required. That is the normal expectation for this older numeric bias-ply fitment, especially on a collector car still using period-style wheels. Tube use is part of the overall fitment system rather than an optional accessory choice.

When replacing tires on a Kaiser Manhattan, treat the tube, flap if required by the wheel design, and rim condition as part of the same service job. A sound tube setup helps avoid trouble caused by aged wheel surfaces, and it is especially worthwhile on cars that sit for long periods between drives.

Kaiser Manhattan tires in 670-15 are available in blackwall, narrow whitewall, and wide whitewall versions. The whitewall offerings include several visual widths, from 1.00-inch narrow whitewalls up through broader period-style whitewalls over 3 inches. All of these are bias-ply tires sized for 15-inch wheels.

That gives a Kaiser Manhattan owner room to match the tire’s appearance to the car’s restoration direction. A blackwall tends to suit a plainer presentation, while narrow and wide whitewalls can move the look from restrained to distinctly mid-1950s. The best choice is usually the one that matches period photos, factory literature, or the car’s intended show standard.

The listed Kaiser Manhattan tire brands in 670-15 are Firestone, US Royal, Coker Classic, Universal Vintage Tire, BFGoodrich, Excelsior, Goodyear, Avon, and STA. Those brands cover a broad mix of traditional bias-ply collector-car offerings, including both blackwall and whitewall styles. Several series are also represented, such as Firestone Classic Bias Ply, US Royal Classic Bias Ply, Silvertown Classic Bias Ply, and multiple Goodyear lines.

Brand choice on a Kaiser Manhattan usually comes down to appearance, period flavor, and the exact tread or sidewall presentation you want. If authenticity matters, compare brand artwork, whitewall width, and overall profile rather than assuming every 670-15 tire will look the same once mounted on the car.

A 1955 Kaiser Manhattan is listed with one tire size: 670-15 on a 15-inch rim. The practical confirmation steps are to read the size on the tire currently fitted, verify the wheel diameter directly on the rim, and compare the rim width with the tire’s recommended range. Because all listed options are bias-ply, the remaining differences are mainly brand, series, and sidewall style.

That process helps separate true fitment from appearance choice. If a Kaiser Manhattan has been modified over the years, the wheel on the car matters more than assumption, and a quick rim measurement can prevent choosing a tire that looks right on paper but is not right for the hardware actually installed.

A Kaiser Manhattan should be stored in a cool, dry, dark space with the tires protected from sunlight, ozone sources, and long exposure to concrete moisture. Keep the tires inflated to an appropriate service pressure for the tire and vehicle load, and move the car occasionally so the same section of each tire is not carrying weight month after month. Clean tires with mild soap and water rather than harsh dressings.

Collector cars like the Kaiser Manhattan often age tires through inactivity more than mileage. If the car will sit for an extended period, using wheel cradles or slightly reducing static load can help, but the main goal is to prevent flat spotting, sidewall drying, and environmental cracking that shortens tire life well before the tread is worn.

Tires on a Kaiser Manhattan should be visually inspected before every drive and given a closer hands-on inspection several times during the driving season. Check for sidewall cracking, tread separation, embedded debris, impact damage, uneven wear, and pressure loss. On an older bias-ply tire, changes in shape or a new vibration matter just as much as visible tread wear.

Frequent inspection is especially important on a collector car because long storage periods can hide problems until the next outing. Looking over the tubes, valve stems, wheel condition, and overall balance of the car’s stance can catch issues early, which is far better than discovering a problem at road speed in a heavy 1950s sedan.

Kaiser Manhattan tires should be replaced when age, cracking, hardening, bulging, repeated air loss, or structural damage appears, even if the tread still looks deep. Collector-car tires often time out before they wear out, particularly when the car is driven only occasionally. Bias-ply tires that have sat for years can look acceptable at a glance yet still be past their useful service life.

The right approach is to judge a Kaiser Manhattan tire by condition, age history, and behavior on the road, not tread depth alone. If steering feel changes, ride harshness increases, or you see sidewall deterioration, replacement is usually the prudent step before returning the car to regular local driving or tour use.

The listed fitment for the 1955 Kaiser Manhattan is 670-15, and the available replacements are bias-ply tires on 15-inch rims. Several period-appropriate brand families and series are represented, including classic bias-ply lines from Firestone, US Royal, BFGoodrich, Universal, and Goodyear. That gives a restorer multiple ways to stay within the correct size and general construction type.

If you are chasing factory-level authenticity on a Kaiser Manhattan, the exact brand, tread pattern, and whitewall treatment should be checked against surviving original paperwork, photos, or marque sources for your specific car. Size and construction come first, but details such as sidewall width can strongly influence how convincing the finished restoration looks.

Correct tire fitment absolutely affects the presentation of a Kaiser Manhattan, and in many judging settings it also influences authenticity scoring. The right 670-15 size, proper 15-inch rim fitment, and an era-appropriate bias-ply profile help the car sit and look as intended. Whitewall width and brand presentation can matter as much visually as the raw size itself.

For a Kaiser Manhattan being restored to a high standard, tires should be chosen as part of the car’s overall historical appearance rather than as a last-minute maintenance item. Marque clubs, period advertising, and original photography are useful references when deciding whether a blackwall, narrow whitewall, or wider whitewall best suits the car.

Kaiser Manhattan tires are available in blackwall, narrow whitewall, and wide whitewall styles, all in the correct 670-15 bias-ply size. Any of those can be appropriate depending on how the particular car was delivered or later presented, but whitewalls are especially consistent with the visual language of mid-1950s American full-size cars. The exact whitewall width changes the character of the car noticeably.

A restorer should match the sidewall style on a Kaiser Manhattan to the trim level, wheel treatment, and intended presentation standard. If the goal is a restrained original look, a narrow whitewall or blackwall may fit best; if the goal is a more formal 1955 showroom presence, a broader whitewall often looks more at home.

A correctly fitted new bias-ply 670-15 tire can be suitable for public-road use on a Kaiser Manhattan when the car is mechanically sound and the tires are matched to proper 15-inch wheels. These are period-style collector tires, so they should be used with an understanding of their original design character rather than judged by modern radial behavior. The heavier-duty STA option should also be selected with care because it serves a different style of use than standard passenger-car presentations.

Safe road use in a Kaiser Manhattan depends on the whole system: tire condition, tube condition, wheel integrity, steering, brakes, alignment, and inflation. A freshly restored car that has sat for years should be tested gradually at modest speeds until you know how it tracks, stops, and responds with the chosen bias-ply tires.

Before driving a Kaiser Manhattan, check tire pressure, visible sidewall condition, tread condition, valve stems, and whether each tire is seated properly on its 15-inch wheel. Also look for cuts, bulges, age cracking, and any sign that the car has developed a lean or a low corner while parked. On a tube-type bias-ply setup, slow air loss deserves immediate attention.

Those checks are especially important on a Kaiser Manhattan because a heavy mid-1950s sedan asks a lot of its tires even at moderate speeds. A few minutes in the garage can reveal the kinds of issues that turn into vibration, wandering, or heat buildup once the car is out on the road.

A Kaiser Manhattan on correct-style bias-ply tires should be driven at speeds appropriate to the tire’s design, the road conditions, and the condition of the car as a whole. Even when new, period-style bias-ply tires do not deliver the same straight-line stability, braking response, or heat tolerance as modern radial touring tires. Smooth, moderate road speeds are the right mindset for this kind of fitment.

In practice, a Kaiser Manhattan owner should build speed gradually and let the car tell you how comfortable it is on its tires and chassis. If the steering feels nervous, the car follows grooves, or the tires generate unusual heat after a run, reduce speed and inspect the setup before planning longer highway use.