Opel Kapitan Tires

Opel Kapitan fitments in this range are 185R15 and 640-15 for 1951 through 1953, 175R13 and 640-13 for 1954 through 1957, 175R13 and 6.70-13 for 1958 through 1959, and 185R14 and 700-14 for 1960. The associated rim diameters are 15 inches for the 1951-1953 sizes, 13 inches for the 1954-1959 sizes, and 14 inches for the 1960 sizes.

That means year alone gets you close, but the wheel on the actual Opel Kapitan still matters because the model changed rim diameter during production and many restored cars have been altered over the years. Use the year listing as your first filter, then verify the wheel diameter and compare the existing tire size on the car before choosing between the radial and bias-ply options shown for that period.

On an Opel Kapitan, 640-15 is an older numeric bias-ply size. The 640 refers to a nominal section width of about 6.40 inches, while the 15 identifies the wheel diameter in inches. It is the period-style 15-inch bias-ply choice used for 1951 through 1953 Opel Kapitan applications, and the available products in this size are bias-ply construction.

A modern buyer should read 640-15 as a sizing system from the bias-ply era rather than as a metric equivalent. If your Opel Kapitan still carries its early 15-inch wheels and you want period look and stance, this is the size family to examine first. Since the available products are bias-ply, plan on tube-type fitment and make sure the wheel itself is suitable for that construction.

Opel Kapitan uses three rim diameters across this production span: 15-inch wheels from 1951 through 1953, 13-inch wheels from 1954 through 1959, and 14-inch wheels in 1960. The tire sizes align directly with those wheel diameters, so 185R15 and 640-15 are 15-inch fitments, 175R13, 640-13, and 6.70-13 are 13-inch fitments, and 185R14 and 700-14 are 14-inch fitments.

That progression is one of the most important Opel Kapitan fitment facts because a mismatched wheel diameter stops the search before brand, sidewall style, or construction even enter the discussion. Measure the wheel, read the stamping if present, and compare it to the tire already on the car. That step is especially important on cars that have seen replacement wheels, later driveline swaps, or long restoration histories.

Opel Kapitan bias-ply sizes in this range require tubes, including 640-15, 640-13, 6.70-13, and 700-14. The available products in those sizes are bias-ply constructions, which are treated here as tube-type applications. The radial sizes, including 185R15 and 185R14, are listed in modern radial form and are not described as tube-required in the same way.

For a restorer, the practical takeaway is simple: if you are choosing one of the numeric bias-ply sizes for Opel Kapitan, include the tube requirement in the plan from the start. If you are moving toward radial fitment, inspect the wheel condition and profile carefully to make sure it suits the intended tire. Matching construction type to the wheel and using the correct supporting components matters just as much as getting the size right.

Opel Kapitan is listed with both bias-ply and radial choices across its production years, and both can be correct depending on the year, wheel diameter, and the kind of restoration you are building. Early cars use 15-inch options in either 640-15 bias-ply or 185R15 radial form, mid-series cars use 13-inch options split between bias-ply and radial, and 1960 cars use either 700-14 bias-ply or 185R14 radial.

Choose bias-ply for the most period-authentic appearance and traditional driving character, especially on a restoration that emphasizes original feel. Choose radial if your priority is more modern road manners within the available size range and your wheel condition supports that choice. The best decision for any Opel Kapitan starts with the actual wheel diameter, then moves to the balance you want between authenticity and drivability.

Yes, radial tires can change how an Opel Kapitan feels on the road compared with bias-ply tires. The available radial offerings for Opel Kapitan are found in 185R15, 175R13, and 185R14 sizes, while the bias-ply choices are 640-15, 640-13, 6.70-13, and 700-14. That means the construction choice is tied not only to ride and handling feel, but also to the year and wheel diameter of the car.

A restorer usually notices the change as a difference in steering response, tracking, and overall touring behavior, while bias-ply tends to preserve more of the original-era driving character. Either can be appropriate on Opel Kapitan when matched to the correct wheel size. If the car is used for local shows and authenticity matters most, bias-ply often makes sense; if it sees more road use, radial fitment may be more appealing.

Mixing crossply and radial tires on an Opel Kapitan is not a good practice. The available fitments show these constructions as separate choices within the same year groups, not as combinations intended to be run together. Because the Kapitan also shifts between 15-inch, 13-inch, and 14-inch wheel diameters across its production run, consistency in both construction and wheel fitment is especially important.

The practical approach is to decide first whether your Opel Kapitan will run period-style bias-ply or radial tires, then fit a full matched set in the correct size for the car’s wheel diameter. That avoids uneven handling behavior and keeps the car visually coherent. If the car has already been restored, inspect all four tires and the spare so you are not unknowingly blending different constructions from an earlier replacement cycle.

A 1958 Opel Kapitan has two listed tire sizes: 175R13 in radial form and 6.70-13 in bias-ply form. Both are 13-inch wheel fitments, so the choice is not a rim-diameter split in that year. Instead, the distinction is mainly construction type and size family, with one option representing a radial replacement approach and the other preserving an older numeric bias-ply format.

Start by checking the wheel diameter and the tire size already mounted on the Opel Kapitan. Then decide whether the car is being restored with a period-style bias-ply look or set up with a radial alternative for different road behavior. Looking at the sidewall style you want also helps narrow the field, since not every construction type is offered with the same visual treatment.

Opel Kapitan tire options in this range include blackwall, narrow whitewall, wide whitewall, and redline sidewall styles. Those styles vary by size and series, with early 15-inch radial options including blackwall, narrow whitewall, and redline, while the 640-15 bias-ply choices include blackwall and multiple whitewall treatments. The 14-inch radial options for 1960 include blackwall and narrow whitewall, and the listed 640-13 product appears as a wide whitewall.

The right sidewall for an Opel Kapitan depends on whether the goal is period-correct restoration, a regional export-market look, or a personalized presentation. A formal restoration usually starts with the sidewall treatment that best fits the car’s era and trim level, then works backward to the correct size and construction. Sidewall style should be a finishing decision, not the first one, because wheel diameter and tire type remain the primary fitment factors.

The Opel Kapitan sizes listed here are offered by Coker Classic, Michelin, Avon, Universal Vintage Tire, BFGoodrich, Firestone, Excelsior, Phoenix, and Vredestein. Those brands are spread across different sizes and construction types, so no single brand covers every Opel Kapitan year in the same way. Michelin and Vredestein appear in radial offerings, while BFGoodrich, Firestone, Avon, and Excelsior appear in several of the bias-ply choices.

Brand selection for Opel Kapitan should come after you confirm the correct size, wheel diameter, and construction type for the specific year of car. Once that is settled, compare the available sidewall treatments and series style that match your restoration goals. That method keeps the decision grounded in fitment first, then appearance, rather than choosing a brand name and trying to force the car into an incorrect size family.

Opel Kapitan tire offerings here span several series, including Coker Classic Radial, Michelin XVS, Turbosteel CR3B, Universal Sport, Silvertown Classic Bias Ply, Firestone Classic Bias Ply, Super Safety Crossply, Excelsior Bias Ply, Michelin MXV, and Sprint Classic. The broad difference is between radial touring-style designs and period-style bias-ply or crossply constructions. Within those groups, the series also differ in sidewall presentation, such as blackwall, narrow whitewall, wide whitewall, and redline.

For an Opel Kapitan owner, the series name is useful because it tells you more than brand alone. It often signals whether the tire is aimed at authentic restoration appearance, later classic-road use, or a more specialized visual style. Narrowing the search by wheel diameter and construction first makes the series choice much easier, especially on a model like Opel Kapitan that moved through several wheel and tire eras in one decade.

An Opel Kapitan should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, ozone sources, and prolonged contact with oil or solvents. Keep the tires inflated to an appropriate operating range for the type fitted and move the car occasionally if it sits for long stretches. Collector cars from this era benefit from stable conditions more than frequent short starts and repositioning in a harsh environment.

If the Opel Kapitan will be parked for an extended season, clean the tires, support the car properly if needed, and avoid leaving heavy weight on one contact patch for months at a time. Bias-ply tires especially can flat-spot and age unevenly when neglected. Good storage preserves both appearance and structure, which matters on a classic sedan that may spend more time parked at shows than covering highway miles.

Tires on an Opel Kapitan should be inspected regularly even if the car is driven only occasionally. A visual and pressure check before each outing is wise, and a more careful inspection at least seasonally helps catch sidewall cracking, tread separation, punctures, valve issues, and uneven wear. On older collector cars, tire condition can change more from age and storage than from mileage.

That routine is especially important on an Opel Kapitan because many cars now run as hobby vehicles, where a tire may look fine at a glance but still have age-related issues. Pay close attention after winter storage or long periods of inactivity. If the car uses bias-ply tires and tubes, inspect both the tire exterior and the wheel condition closely, since air retention and structural integrity depend on the complete assembly.

Tires on an Opel Kapitan should be replaced when age, cracking, hardening, bulges, vibration, or other structural concerns appear, even if the tread still looks usable. Collector-car tires often age out before they wear out because the car sees limited miles and long periods of storage. Tread depth alone is not a reliable measure of service life on a classic vehicle from this period.

If an Opel Kapitan has sat for years, or if its tires have an unknown age history, replacement is often the prudent course before regular road use resumes. That is particularly true when evaluating older bias-ply tires on a seldom-driven restoration. A tire that remains visually attractive can still be too old for dependable service, so age and condition should carry more weight than appearance when deciding whether to keep or replace a set.

Opel Kapitan appears here with both bias-ply and radial size families depending on year, including 640-15 and 185R15 for 1951 through 1953, 640-13 and 175R13 for 1954 through 1957, 6.70-13 and 175R13 for 1958 through 1959, and 700-14 and 185R14 for 1960. The available series include both classic bias-ply lines and radial lines, which shows that more than one restoration direction is possible within the listed years.

For a strict originality project, the best reference for an individual Opel Kapitan remains factory literature, surviving original cars, and marque-club guidance for the exact year. Once the size family is established, the sidewall style and construction type can be matched more closely to the character of the car. That approach is more reliable than assuming every car in a model run left the factory with the same tire specification.

Correct tire fitment can affect both judging and buyer perception on an Opel Kapitan because tire diameter, width, construction type, and sidewall treatment all shape how the car sits and whether it looks consistent with its era. A 1951-1953 car on correct 15-inch fitment presents differently from a 1954-1959 car on 13-inch fitment, and a 1960 car has its own 14-inch wheel identity. Judges and knowledgeable buyers notice those distinctions quickly.

For a restoration-minded owner, the practical lesson is to treat tires as part of the car’s visual and historical correctness, not as an accessory added at the end. If the Opel Kapitan is being prepared for marque judging or top-tier resale, compare the selected size and sidewall style against period references and club standards. Even when a radial is chosen for road use, the overall profile and appearance should still respect the car’s year.

Opel Kapitan tire choices here include blackwall, narrow whitewall, wide whitewall, and redline depending on size and series. That means restoration appearance can vary meaningfully from one selection to another, even within the same wheel diameter. Wide whitewalls appear among the bias-ply offerings, while blackwall and narrow whitewall are common across several radial and bias-ply options, and redline appears in certain 185R15 radial products.

The correct sidewall for an Opel Kapitan restoration depends on the year of the car and the presentation you are trying to achieve. A conservative restoration typically starts with blackwall or whitewall choices that suit the period, while redline usually points toward a more personalized look. Check period photography and marque references for the exact car, then choose the sidewall style only after the wheel diameter and size family are settled.

A properly fitted and properly maintained tire can be suitable for public-road use on an Opel Kapitan, but suitability depends on choosing the correct size, matching the wheel diameter, and using a tire whose age and condition support real driving. The listed options include both radial and bias-ply constructions, and those deliver different road manners. Safety starts with fitment accuracy, then moves to condition, inflation, and the overall mechanical state of the car.

An Opel Kapitan that is driven on public roads should be treated like any older collector car: inspect it carefully, drive it within the limits of its tire construction, and avoid assuming cosmetic appearance equals road readiness. A fresh radial set may suit touring use differently than a period-style bias-ply set chosen for authenticity. The tire decision should be made as part of a complete roadworthiness review, not in isolation.

Before driving an Opel Kapitan, check tire pressure, visible sidewall condition, tread condition, valve stems, and whether all four tires match in size and construction. Also confirm that the wheel diameter matches the installed tire size: 15-inch for the early sizes, 13-inch for the mid-series sizes, and 14-inch for the 1960 sizes. On bias-ply applications, tube-related condition and wheel integrity deserve extra attention.

That quick inspection matters because an Opel Kapitan is now a collector car, and long storage can create problems that only show up once the car is back in motion. If the steering feels odd, the car wanders, or a tire shows uneven shape after sitting, stop and inspect more closely. A careful pre-drive routine helps catch small issues in the garage rather than on the road.

Appropriate speed for an Opel Kapitan depends heavily on whether it is fitted with period-style bias-ply tires or modern radial alternatives in the correct classic sizes. Bias-ply tires generally call for a more conservative driving style, while radial tires typically support steadier modern-road behavior when the rest of the car is equally sound. In either case, the car’s age, suspension condition, brake performance, and tire condition all matter as much as the size itself.

The sensible rule with any Opel Kapitan is to drive within the comfort range of the whole vehicle rather than assuming the tire alone sets the limit. A freshly restored touring car on radials may feel very different from a show-oriented car on bias-ply tires. Build speed gradually after any tire change, learn how the car responds, and keep expectations aligned with a 1950s to 1960-era chassis rather than a modern sedan.