1955 Daimler Century Tires

The 1955 Daimler Century uses two primary tire sizes: 185R15 in radial construction and 670-15 in bias-ply construction. Both sizes are 15-inch fitments, so the tire decision is less about wheel diameter and more about which construction and size format matches the car's present setup and the owner's goals.

A car that has remained closer to a traditional mid-1950s presentation may still suit 670-15 bias-ply tires, while a Century already running radial-format tires may point toward 185R15. Checking the wheel width, the current tire type, and fender and steering clearance is the right next step before selecting a replacement.

The 1955 Daimler Century uses a 15-inch rim diameter with both of its primary tire sizes, 185R15 and 670-15. That shared diameter simplifies the first step of fitment, because the question is not whether the car needs a 14-inch or 16-inch tire, but which 15-inch size and construction belong on the car.

Wheel width still matters even when rim diameter is correct. Bias-ply and radial products in these sizes can call for different width ranges, so measuring the actual wheel and confirming whether it is original-style or aftermarket helps avoid a mismatch between the tire selected and the wheel already on the car.

Yes. The covered 1955 Daimler Century Base & Coupe uses the same two fitment paths: 185R15 radial and 670-15 bias-ply, both on 15-inch rims. That means the sub-model does not create a separate tire-size split within this application.

Even with shared fitment, the car still needs to be evaluated as it sits today. A Century fitted with radial tires, replacement wheels, or suspension changes may call for a different choice than one kept in a more traditional bias-ply configuration, so current wheel and tire setup should guide the final selection.

670-15 is a bias-ply tire size for the 1955 Daimler Century. It uses the older numeric sizing format common to the era, and it represents the traditional construction option alongside the separate 185R15 radial fitment available for this model.

Choosing 670-15 usually means preserving a more vintage tire format and appearance, especially with the wide variety of blackwall, narrow whitewall, and wide whitewall offerings in that size. The key check is making sure the car's wheels and current setup still suit a bias-ply tire rather than assuming any 15-inch wheel arrangement is automatically the same.

Radial equivalents for 670-15 include 195R15 as an 80-series metric radial, P205/75R15 as a 75-series P-metric radial, P215/70R15 as a 70-series P-metric radial, and 670R15 as a bias-look radial equivalent. These options give the 1955 Daimler Century owner several radial-format alternatives tied to the original 670-15 bias-ply size.

Those equivalents are not all the same in sizing convention or profile, so they should be treated as alternatives rather than automatic substitutions. A 5 to 7 inch rim-width range is associated with the equivalents, and wheel width, overall dimensions, and vehicle clearance all deserve a careful look before converting.

Either can be appropriate on a 1955 Daimler Century because both 670-15 bias-ply and 185R15 radial fitments are used on this model. The better choice depends on whether the priority is a traditional period-style look and feel or a radial-format setup that matches how the car is already equipped.

Bias-ply and radial tires should not be treated as the same decision with different tread patterns. Construction changes can affect wheel-width suitability, visual stance, and clearance around the body and steering components, so the sensible approach is to match the tire to the car's current wheels, intended use, and restoration direction.

Start with the fact that 670-15 is the bias-ply option for the 1955 Daimler Century, so the first decision is whether the car should stay with that traditional construction. From there, the meaningful differences are sidewall style, tire series, brand, and wheel-width compatibility among the available 15-inch bias-ply products.

Some 670-15 choices lean toward blackwall simplicity, while others emphasize narrow or wide whitewall presentation for a more restoration-oriented look. It also helps to compare rim-width requirements and, where stated, load figures such as 1450@32 psi, 1550 @32 psi, or 1530@45 psi instead of focusing on appearance alone.

The 1955 Daimler Century has a broad sidewall range across its two fitment paths. Blackwall, redline, narrow whitewall, and wide whitewall styles are all available, with most of the whitewall variety appearing in 670-15 bias-ply tires and redline options appearing in the 185R15 radial size.

Sidewall style has a major effect on the car's character even when the tire size is correct. A blackwall usually gives a cleaner, more understated look, while whitewall widths and redlines create a more visibly period-minded presentation, so appearance goals should be weighed alongside construction type and wheel compatibility.

Brands available for the 1955 Daimler Century include Coker Classic, Michelin, Avon, Universal Vintage Tire, Firestone, US Royal, BFGoodrich, Excelsior, Goodyear, and STA. Some are tied to the 185R15 radial fitment, while others appear in the larger 670-15 bias-ply assortment.

Brand selection matters most when it helps narrow the kind of tire wanted rather than when it is treated as a ranking exercise. The more useful comparison is which brand offers the right size, construction, sidewall treatment, tire series, and wheel-width compatibility for the way the Century is equipped and intended to be used.

A period-style 1955 Daimler Century usually starts with the 670-15 bias-ply fitment, since that size and construction align with the more traditional tire presentation available for the car. That size also gives the widest spread of visual choices, including blackwall, narrow whitewall, and several wide whitewall treatments.

Appearance goals still need to be balanced with how the car is driven and how closely the restoration follows historical detail. When exact originality matters, marque-specific references and restoration documentation are worth consulting, while owners aiming for a generally authentic mid-1950s look can focus first on correct size, construction, and sidewall style.

Tire construction changes more than the hidden structure of the casing on a restored 1955 Daimler Century. A 670-15 bias-ply tends to support a more traditional vintage presentation, while an 185R15 radial gives the car a later-style radial format even when the wheel diameter remains the same.

That visual difference becomes especially noticeable when sidewall style is part of the build theme. A wide whitewall bias-ply can push the car toward a distinctly mid-1950s look, while blackwall or redline radial choices create a different character, so construction and sidewall should be selected together rather than as separate decisions.

Yes. Modifications can change tire fitment on a 1955 Daimler Century even when the nominal size still looks correct on paper. Aftermarket wheels, different wheel widths, altered offsets, suspension changes, or body and brake updates can all influence whether a 185R15 radial or 670-15 bias-ply remains a sensible match.

A car that sits lower, steers differently, or runs non-original wheels should be checked carefully before replacement tires are chosen. Clearance at full steering lock, space under the fenders, and the actual wheel dimensions matter more than assumptions, especially when moving between bias-ply and radial constructions.

Before driving a 1955 Daimler Century on new tires, inspect the wheels for correct diameter and condition, verify the wheel width suits the tire selected, and make sure the tires are mounted and inflated properly. It is also wise to check for steering or fender interference before the car returns to regular road use.

A collector car deserves a broader walk-around as well. Look at suspension wear, check for uneven ride height, confirm lug hardware is correct, and keep an eye on pressure retention after the first drives, since a fresh set of tires can quickly reveal wheel, alignment, or clearance issues that were already present.

Collector-car tires on a 1955 Daimler Century should be maintained with regular pressure checks, visual inspection, and attention to age and storage condition as much as tread wear. Whether the car runs 670-15 bias-ply tires or 185R15 radials, cracks, bulges, cuts, and persistent air loss deserve immediate attention.

Low-mileage classics often age their tires long before they wear them out. Clean, dry storage away from prolonged sunlight, heat, and ozone sources helps preserve the rubber, and occasional inspection of the spare and all road wheels is worthwhile before any longer drive or touring event.