1964 Daimler Tire Fitment Guide

1964 Daimler vehicles use five sizes across three model lines: 185R15 and 640-15 for the 2.5 Litre, 700-16 for the 4.5 Litre, and 165R15 plus 590-15 for the SP 250. The 2.5 Litre and SP 250 both use 15-inch fitments, while the 4.5 Litre uses a 16-inch fitment. Rim-width guidance varies by size where published, with 185R15 generally spanning 4.5 to 6.5 inches, 640-15 running from 4.0 to 5.0 inches depending on the tire, 700-16 covering 4.5 to 5.5 inches on products that publish a range, 165R15 covering 4.5 to 6.0 inches, and 590-15 using 4.0 to 4.5 inches where stated.

That means year and make alone are not enough for a confident tire choice on a 1964 Daimler. Start by confirming whether you have a 2.5 Litre, 4.5 Litre, or SP 250, then verify whether you want the model's radial size or its bias-ply alternative where both exist. If your car has replacement wheels, compare the actual wheel diameter and width to the tire you are considering before moving forward.

On a 1964 Daimler, 185R15 is an older Euro-metric radial size. The 185 refers to a nominal section width of 185 millimeters, the R indicates radial construction, and the 15 identifies the wheel diameter in inches. In period-style metric sizing of this type, the missing aspect ratio is conventionally treated as an 80-series profile rather than a modern low-profile tire.

For a 1964 Daimler 2.5 Litre, that decoding matters because 185R15 points you toward a radial tire family with very different behavior and styling choices than the 640-15 bias-ply alternative. You will also see versions with different sidewall treatments and speed ratings, such as H and V, so the exact tire depends on whether your priority is visual authenticity, discreet appearance, or sustained higher-speed touring within the car's overall mechanical comfort zone.

No, 1964 Daimler models do not share one universal tire size. The 2.5 Litre uses either 185R15 or 640-15, the 4.5 Litre uses 700-16, and the SP 250 uses either 165R15 or 590-15. Even where two models share a 15-inch wheel diameter, the actual tire sizes are different, so one 15-inch Daimler fitment should not be assumed to substitute for another.

The practical takeaway is that identifying the exact model comes before thinking about brand or sidewall style. The 4.5 Litre is easiest to separate because of its 16-inch fitment, while the 2.5 Litre and SP 250 each have their own paired 15-inch options. If a car has had wheel changes during its life, confirm the actual wheel size on the car and compare it to the correct model-specific tire range before choosing.

For a 1964 Daimler 2.5 Litre, the 185R15 and 640-15 represent two different approaches rather than two random alternatives. The 185R15 is a radial on a 15-inch wheel, while the 640-15 is a numeric bias-ply on a 15-inch wheel. Radials generally appeal to owners who want more familiar modern road behavior, while bias-ply tires better preserve the visual and driving character expected of an early-1960s luxury saloon.

The right choice depends on how you use the car. A restoration aimed at period presentation usually leans toward 640-15, especially when whitewall profile matters to the finished look. A 2.5 Litre that will see regular touring often points owners toward 185R15, where blackwall, narrow whitewall, and even redline options exist. Keep the decision model-specific, because this comparison applies to the 2.5 Litre and not to the SP 250 or 4.5 Litre.

1964 Daimler tires come in several sidewall styles depending on size. The 185R15 for the 2.5 Litre is available as redline, narrow whitewall, and blackwall. The 640-15 appears in wide whitewall and narrow whitewall form, the 700-16 in blackwall and wide whitewall, the 165R15 in wide whitewall, narrow whitewall, and blackwall, and the 590-15 in blackwall and wide whitewall.

For a 1964 British car, blackwall is often the most restrained and broadly appropriate visual choice, especially on sporting or export-oriented applications. Whitewall width becomes more important when you are tailoring the look of a saloon or recreating a particular period presentation. Because sidewall appearance can change the whole stance of the car, it helps to decide on the visual style first and then narrow down the products that match that look in the correct model-specific size.

1964 Daimler tire coverage spans several brands, and the mix depends on size. The 185R15 is available from Coker Classic and Michelin, the 640-15 from BFGoodrich and Firestone, the 700-16 from Lester, Avon, BFGoodrich, and Firestone, the 165R15 from Coker Classic, American Classic, Firestone, and BFGoodrich, and the 590-15 from BFGoodrich and Avon. That spread gives Daimler owners access to both American classic-tire names and brands with long-standing British and European associations.

Brand choice should come after you have settled the correct size and construction for your exact Daimler model. Once that is done, compare brands by the sidewall style you want, the published rim-width range, and any speed or load markings relevant to how you drive the car. On a collector vehicle, the most satisfying choice is often the one that best matches the car's intended use and visual character, not simply the most familiar name.

Rim-width guidance for 1964 Daimler tires depends on the size. The 185R15 generally fits wheels from 4.5 to 6.5 inches wide, though some versions begin at 5.0 inches. The 640-15 spans 4.0 to 5.0 inches depending on the tire, the 700-16 runs 4.5 to 5.5 inches where a range is published, the 165R15 fits 4.5 to 6.0 inches, and the 590-15 uses 4.0 to 4.5 inches on products that specify width.

Those ranges matter because two tires with the same rim diameter may still expect different wheel widths. Before fitting a tire to a 1964 Daimler, measure the actual wheel if there is any doubt, especially on a car that may have replacement rims from a past restoration. Staying inside the published width range helps preserve proper sidewall shape and keeps the tire working as intended on the road.

Some 1964 Daimler models have both a radial and a bias-ply option on 15-inch wheels, but that does not automatically make every 15-inch wheel suitable for every tire. The 2.5 Litre pairs 185R15 with 640-15, and the SP 250 pairs 165R15 with 590-15, so wheel diameter is shared within each model. Rim-width expectations still differ by size, with radial and bias-ply products often covering overlapping but not identical width ranges.

That means the original wheel can often remain in service when switching between the model's 15-inch options, but the actual wheel width should be confirmed before assuming interchange. This is especially useful when a car is being moved from a show-oriented setup to a more road-used setup, or the reverse. Keep the comparison within the same model family, because the 4.5 Litre's 700-16 fitment is a separate 16-inch case.

A 1964 Daimler should be stored in a cool, dry, dark place away from direct sunlight, electric motors, battery chargers, welders, and other ozone sources that can age rubber. Keep the tires properly inflated, and move the car periodically so one section of tread is not carrying the same load for months at a time. On cars wearing bias-ply tires such as 640-15, 700-16, or 590-15, temporary flat-spotting during long storage is more common than on radial tires.

If the car will sit for an extended period, many owners either roll it occasionally or support it in a way that reduces continuous load on the tires while avoiding suspension damage. Bias-ply-equipped Daimlers benefit most from this attention, especially in cooler climates where flat spots can feel more pronounced on the first miles. Clean, dry storage and pressure checks do more for tire life than simply covering the car and forgetting it.

On a 1964 Daimler, tire age matters more than mileage because collector cars often accumulate very little annual use. A sensible rule is to begin evaluating tires closely once they reach about five to seven years of age and to treat around ten years as the point where replacement deserves serious consideration, even if tread depth still looks good. The DOT date code on the tire is the best way to determine age.

That approach is especially important on cars that spend long periods parked and may appear cosmetically fine while the rubber hardens internally. A lightly driven SP 250 or 2.5 Litre can still age out a set of tires before it wears them out, and the same is true of a larger 4.5 Litre. If the date code and condition suggest the tires are aging, replacement is usually wiser than trying to stretch extra seasons from them.

Tires on a 1964 Daimler should be checked before every drive and again before any longer trip. Look for sidewall cracking, weathering, cuts, bulges, uneven tread wear, and signs that the tire is not holding pressure. On bias-ply applications and any older wheel-and-valve setup, it is also smart to pay close attention to valve-stem condition and any changes in how the car feels during the first miles after sitting.

Regular inspection matters because collector-car failures often begin with age and storage rather than high mileage. A quick visual and pressure check before each outing catches many problems early, while a more careful inspection before touring can prevent a roadside issue. If a 1964 Daimler has been dormant for a long period, inspect the spare as well, since it may be the oldest tire on the car and the one most likely to be forgotten.

For a 1964 Daimler 2.5 Litre, bias-ply construction would have been the period-standard type when new, and the model's bias-ply fitment here is 640-15. A 185R15 radial is also used on the 2.5 Litre, reflecting the era's growing transition toward radial tires in European applications and later owner preferences. The exact factory-delivery specification could vary by market and equipment, so the key period distinction is construction type first, then sidewall style.

If your goal is authenticity, start by deciding whether the car is being restored to a strict showroom-era presentation or to a long-lived in-service configuration that may plausibly have adopted radials later. Then compare your car's surviving wheels, period photos, and any original handbook material. For event-level confirmation, a Daimler marque club or model specialist is the best source for market-specific guidance on what judges and historians expect to see.

Correct tire fitment does matter when showing a 1964 Daimler, especially in events that reward originality. Judges and knowledgeable enthusiasts often notice whether the size, construction type, and sidewall treatment suit the model and the period. A radial on a car presented as factory-original, or an overly modern-looking sidewall on an otherwise accurate restoration, can stand out even if the tire physically fits the wheel.

The level of scrutiny depends on the event. Casual local shows may reward overall presentation, while marque-focused concours events can be much more attentive to whether a 2.5 Litre, 4.5 Litre, or SP 250 wears the correct style of tire for the story the car is telling. If the car will be judged seriously, verify your intended tire choice against club standards and period reference material before the restoration is finalized.

On a 1964 Daimler, bias-ply and radial choices are available on the 2.5 Litre and SP 250, and the difference is more than just the wording on the sidewall. Bias-ply options are 640-15 for the 2.5 Litre and 590-15 for the SP 250, while radial options are 185R15 and 165R15. Bias-ply tires preserve a more period-correct look and traditional feel, while radials reflect the construction style that many owners prefer for regular road use.

For restoration planning, think about the intended finished character of the car. A judged, era-faithful build often leans toward bias-ply, especially if whitewall width and stance are part of the visual target. A Daimler that will spend more time on modern roads may lead its owner toward the model's radial alternative instead. Either way, keeping the choice consistent with the exact model and wheel size is more important than chasing a universal answer across the whole make.

1964 Daimler tires can be suitable for highway driving when they are the correct size, in good condition, properly inflated, and used within their construction and speed limits. Some sizes carry explicit speed markings, including H up to 130 mph on certain 185R15 and 590-15 tires, V up to 149 mph on one 185R15, and L up to 75 mph on one 700-16C product. Other tires in the range are classic bias-ply designs whose safe real-world use depends heavily on age, condition, and the car's overall state of tune.

In practice, a 1964 Daimler's brakes, suspension, steering, and general mechanical condition usually matter as much as the tire itself at normal highway speeds. A healthy radial-equipped 2.5 Litre or SP 250 may feel more familiar on modern roads, while a bias-ply-equipped car should be driven with respect for its period behavior. The key is matching the tire to the model, then keeping speeds and expectations appropriate to the whole car, not just the sidewall marking.

Inflation pressure on 1964 Daimler tires should begin with the vehicle maker's original recommendation for the exact model and size, then be checked against the tire's own rated load-and-pressure information. Among the available tires, examples include 185R15 at 1,355 pounds at 35 psi, 640-15 at up to 1,190 pounds at 32 psi, 700-16 at up to 1,900 pounds at 36 psi, 165R15 at 1,168 pounds at 35 psi or 1,170 pounds at 36 psi, and 590-15 at 1,050 pounds at 32 psi on some products. Those numbers are load-rating references, not universal instructions for every Daimler.

That distinction matters because one pressure should not be copied from one tire size to another simply because the cars are from the same year. Use the original handbook as your baseline for the car, then compare it to the construction and load information on the tire you are actually fitting. If your 1964 Daimler has moved from bias-ply to radial, or vice versa, confirm the recommendation with the tire manufacturer rather than guessing from the previous setup.

Before taking a 1964 Daimler on a longer drive, inspect each tire for visible cracking, cuts, bulges, irregular wear, and correct cold inflation pressure. Check that the spare is usable, that the valve stems are sound, and that any older bias-ply tire does not show signs of structural fatigue from age or storage. The wheel itself should also be examined for damage, corrosion, or poor seating if the car has been apart during restoration.

Tires are only one part of the pre-drive routine on a mid-century Daimler. A longer outing also deserves a basic check of brakes, steering response, fluid levels, cooling-system health, and whether the car tracks normally at speed. On an SP 250 or 2.5 Litre that has been sitting, a short shakedown run close to home is smart before committing to distance. A careful inspection makes the drive more enjoyable and helps prevent small age-related issues from becoming trip-ending ones.