1955 Opel Caravan & Wagon Tires

The 1955 Opel Caravan & Wagon uses two recognized tire sizes: 640-13 in bias-ply construction and 175R13 in radial construction. Both sizes are associated with the Base sub-model and both use a 13-inch rim, so the fitment question is more about construction and tire style than wheel diameter.

That means the next step is deciding whether the wagon is being kept in a more traditional period-style configuration or set up with a radial alternative. It is still smart to confirm the actual wheel width on the vehicle, especially on an older Opel that may have had wheels replaced over the years.

The tire sizes used on the 1955 Opel Caravan & Wagon are built around a 13-inch rim diameter. That applies to both the 640-13 bias-ply fitment and the 175R13 radial fitment, so there is no change in rim diameter between the two main size paths.

Rim diameter is only part of the fitment picture on a vintage wagon like this. The actual wheel width should also be checked before choosing a tire, particularly if the car has been modified, stored for a long time, or fitted with replacement wheels that may not match the original setup.

The 1955 Opel Caravan & Wagon Base is associated with the same two tire sizes used for this model core: 640-13 bias-ply and 175R13 radial. In practical terms, the sub-model does not create a separate wheel-diameter question, since both choices remain on a 13-inch rim.

That makes the Base model decision fairly straightforward. Instead of sorting through different trim-specific sizes, the owner can focus on whether a traditional bias-ply look is the goal or whether a radial setup better suits intended road use, while still verifying the wheel width and available clearance on the actual car.

640-13 is a bias-ply tire size for the 1955 Opel Caravan & Wagon. It uses the older numeric bias-ply sizing format, and on this vehicle it represents the traditional fitment choice for owners who want to stay with a vintage-style construction on the original 13-inch wheel diameter.

Choosing 640-13 usually means the focus is on preserving a period-style appearance and the character that comes with bias-ply construction. Since collector vehicles often see wheel changes over time, the tire should still be matched to the wheel width on the car rather than assuming every 13-inch wheel is equally suitable.

Radial equivalents for 640-13 include 175R13, P175/75R13, P185/70R13, and 650R13. Those options cover an 80-series metric radial, a 75-series P-metric radial, a 70-series P-metric radial, and a bias-look radial equivalent that keeps a more traditional visual character than a modern-looking radial.

Each of those alternatives should be treated as a comparison option rather than an automatic swap. A 4-6 inch rim-width range is tied to the equivalent group, and the owner should also confirm wheel compatibility, overall tire dimensions, and fender and steering clearance before moving away from the original 640-13 bias-ply size.

Start by confirming the wheel diameter and actual wheel width on the car, then compare the intended radial size with the existing 640-13 fitment. For this Opel, radial-equivalent choices include 175R13, P175/75R13, P185/70R13, and 650R13, but each one should be evaluated against the car's current setup rather than assumed.

A careful conversion check should also include tire-to-fender clearance, steering clearance, suspension condition, and the vehicle's intended use. Older wagons are often altered with replacement wheels or ride-height changes, and those details can matter just as much as the size code when deciding whether a radial alternative is practical.

The main considerations are construction, appearance, and wheel compatibility. A 640-13 tire keeps the 1955 Opel Caravan & Wagon in its traditional numeric bias-ply format, so it is often chosen by owners who want a more vintage presentation rather than a modern radial look.

Beyond size alone, compare the tire series, sidewall treatment, and the wheel-width range that suits the tire being considered. A wide whitewall can strongly shape the wagon's visual character, while the actual wheel on the car still needs to match the tire's requirements for safe and sensible fitment.

The available sidewall style in the 640-13 product selection for the 1955 Opel Caravan & Wagon is a wide whitewall. That gives the wagon a distinctly mid-1950s look and makes sidewall appearance a meaningful part of the tire decision, not just a cosmetic afterthought.

Sidewall style matters most when the car is being restored or presented with a period-style theme. A wide whitewall can change the visual balance of the car considerably, so it should be chosen with the vehicle's intended appearance in mind while still keeping size, construction, and wheel compatibility as the first priority.

The 640-13 bias-ply product offering for the 1955 Opel Caravan & Wagon includes the Silvertown Classic Bias Ply series from BFGoodrich. That series places the emphasis on traditional bias-ply construction and an appearance that suits a restoration-oriented or period-style presentation on a compact mid-1950s wagon.

Series names are useful because they help distinguish the character of a tire beyond just the size code. Once the correct size and construction have been chosen, the series can help narrow the decision by appearance and intended use, while the actual wheel width and overall setup on the car still deserve a final check.

For a period-style 1955 Opel Caravan & Wagon, the 640-13 bias-ply size is the natural place to start. It preserves the original-era sizing format and gives the vehicle the visual character most buyers expect from a compact European wagon of the mid-1950s, especially when paired with a traditional sidewall treatment.

That does not automatically make every tire in that size the right restoration choice, since details such as sidewall style can change the look significantly. Owners pursuing high-level originality should compare the tire's appearance with marque references, historical photos, or restoration documentation before settling on a final presentation.

Tire construction has a noticeable effect on the look of a restored 1955 Opel Caravan & Wagon because bias-ply and radial tires present differently even when they stay close in size. A 640-13 bias-ply generally supports a more vintage visual impression, while a 175R13 or another radial alternative introduces a more modern sizing language and stance.

Appearance is only one part of the decision, but on a restoration-oriented car it often matters just as much as road feel. Buyers who want to preserve the wagon's period flavor usually evaluate the construction first, then choose a sidewall treatment that complements the body style without assuming it duplicates exact factory delivery.

Yes, modifications can affect tire fitment on a 1955 Opel Caravan & Wagon even when the tire size itself is correct. Replacement wheels, altered wheel widths, suspension changes, ride-height changes, and body repairs can all influence how a 640-13 or 175R13 tire sits in the wheel opening and steers at full lock.

That is why a vintage wagon should be checked as it actually exists today, not only by catalog size. Looking at wheel width, tire-to-fender space, and steering clearance before installation helps prevent avoidable fitment surprises, especially on older vehicles that may have gone through decades of maintenance or customization.

Inspect the wheels, valve stems, lug hardware, and general suspension condition before putting a 1955 Opel Caravan & Wagon back on the road with new tires. It is also worth checking that the tires are inflated properly, seated correctly on the rims, and clear the body and steering components throughout the full range of movement.

On a collector vehicle, tire installation is only part of road readiness. Brake condition, wheel-bearing health, alignment, and signs of rubbing during a slow test drive can all reveal issues that a simple size match does not. A careful once-over is especially important after long storage or recent mechanical work.

640-13 tires on a collector 1955 Opel Caravan & Wagon should be maintained with regular pressure checks and routine visual inspection for cracking, bulges, cuts, tread wear, and signs of air loss. A car that sees occasional use still needs tire attention, because age and storage conditions can affect condition even when mileage stays low.

Storage habits matter on an older wagon. Keeping the vehicle away from prolonged sunlight, excess heat, moisture, and ozone sources can help protect the tires between drives, and periodic inspection remains important before any extended outing. Low annual mileage should never be taken as proof that the tires are road-ready.