1957 Borgward Tire Fitment Guide

1957 Borgward vehicles use six sizes across two model lines. The Hansa uses 195R15 radial or 670-15 bias-ply tires on 15-inch rims, while the Isabella uses 165R13 radial, 175R13 radial, 590-13 bias-ply, or 640-13 bias-ply tires on 13-inch rims. Listed rim-width guidance appears for 670-15 at 4.50-5.00 inches and 5.00-6.00 inches depending on product, for 165R13 at 4.50-6.00 inches, for 590-13 at 3.50-4.00 inches, and for 640-13 at 4.00-4.50 inches.

The practical takeaway is that year and make alone are not enough for a 1957 Borgward tire decision. Start by identifying whether you have a Hansa or an Isabella, then confirm whether your wheels are 15-inch or 13-inch before comparing bias-ply versus radial options. On Isabella models especially, there is more than one width in both construction types, so checking the wheel and the car's current fitment before choosing a product will save a lot of backtracking.

On a 1957 Borgward, 670-15 is a classic numeric bias-ply size. The 6.70 figure refers to the tire's nominal section width, and the 15 refers to the wheel diameter in inches. For Borgward use, that size belongs to the Hansa rather than the Isabella, and available products place it on 15-inch rims with listed rim-width ranges spanning 4.50-5.00 inches or 5.00-6.00 inches depending on the tire chosen.

That size code matters because it signals more than just diameter. It also places you in the older bias-ply family, which is the right visual direction for a faithful 1950s presentation and often comes with blackwall or wide whitewall styling choices. If your Hansa already wears modern radials, a 670-15 bias-ply will change both appearance and driving feel, so it is worth deciding whether originality or everyday touring is the main goal.

On a 1957 Borgward, 165R13 is an older Euro-metric radial size. The 165 is the nominal section width in millimeters, the R denotes radial construction, and the 13 is the wheel diameter in inches. For Borgward applications, 165R13 belongs to the Isabella, and the listed products are blackwall radials from Michelin and Dunlop, with Michelin examples marked tubeless and carrying H speed ratings.

That makes 165R13 easier to read once you know the format: metric width, radial construction, 13-inch wheel. It is also a reminder that not every Isabella tire is the same just because the wheel diameter matches. A 165R13 radial sits in a different family from a 590-13 or 640-13 bias-ply, so choosing by appearance, ride character, and wheel suitability is more useful than looking only at the last number in the size code.

No, 1957 Borgward models do not all use the same tire size. The Hansa uses 15-inch fitments, specifically 195R15 radial or 670-15 bias-ply, while the Isabella uses 13-inch fitments in 165R13, 175R13, 590-13, or 640-13. There is no crossover between the Hansa and Isabella size groups, so a tire that fits one model family is not automatically appropriate for the other.

That difference is why the model name matters just as much as the year and make on a Borgward search. Once you know whether the car is a Hansa or an Isabella, the list becomes much more manageable and you can compare the construction choices that actually belong to that model. If the car has changed hands several times or has been restored, checking the wheel diameter on the car itself is a smart final confirmation.

For a 1957 Borgward Hansa, the choice between 195R15 and 670-15 is mainly a choice between radial and bias-ply construction on the same 15-inch wheel diameter. The 670-15 follows the traditional numeric bias-ply format and is offered in period-looking blackwall and wide whitewall styles, while 195R15 is the radial alternative. The decision is less about basic fitment category and more about which construction best suits how you want the Hansa to present and drive.

A Hansa headed for show presentation or a restoration with strong originality goals will usually lean toward 670-15 bias-ply. A car expected to spend more time on modern roads may lead its owner toward the radial route instead. Either way, verify the actual wheel and the product's approved rim-width range before committing, because construction choice should complement the car's intended use rather than simply follow what happens to be on it now.

1957 Borgward tire sidewall styles vary by size. The 670-15 Hansa size is available in both blackwall and wide whitewall offerings, while the 165R13 Isabella radial products shown here are blackwall only. The 590-13 and 640-13 Isabella bias-ply options are both wide whitewall, giving the smaller Borgward model a distinctly period-correct whitewall look if that is the appearance you want.

Sidewall style can change the whole visual balance of a 1950s European car, so it is worth choosing it intentionally rather than treating it as a minor detail. Blackwalls tend to suit a more restrained or driver-focused presentation, while wide whitewalls push the car toward a stronger period statement. If the Borgward will be judged at marque or concours events, check the expected sidewall treatment for your specific body style and market before settling on a look.

Several brands cover 1957 Borgward applications. In 670-15 for the Hansa, available brands include Firestone, US Royal, Coker Classic, and Universal Vintage Tire. In 165R13 for the Isabella, the available brands shown are Michelin and Dunlop, while 590-13 and 640-13 bias-ply Isabella sizes are represented by BFGoodrich. The brand mix changes with the size rather than carrying evenly across the entire Borgward range.

That matters because the right brand choice starts with the right size family. A Hansa owner choosing 670-15 will compare traditional bias-ply offerings and sidewall treatments, while an Isabella owner looking at 165R13 is selecting among radial blackwalls from European-heritage brands. Once the correct size is established, then it makes sense to compare the finer points such as sidewall appearance, load listing, and approved rim-width range within that size.

Rim-width guidance for 1957 Borgward tires varies by size. For the Hansa's 670-15 size, listed products call for either 4.50-5.00 inch rims or 5.00-6.00 inch rims depending on the tire selected. For the Isabella, 165R13 radial products list 4.50-6.00 inch rim widths, 590-13 bias-ply lists 3.50-4.00 inches, and 640-13 bias-ply lists 4.00-4.50 inches. Those ranges show that wheel width can change within the same model family.

The practical step is to match the exact product to the actual wheel, not just the vehicle name. Two tires that share the same rim diameter may still want different rim widths, especially when comparing narrow bias-ply sizes to wider radials. Measuring the wheel or confirming its specification during a restoration is worth the effort, because it helps preserve proper tire profile and avoids forcing a tire onto a wheel that falls outside its intended range.

Inner-tube requirements for 1957 Borgward tires depend on the exact size and product. The 165R13 radial listings include Michelin products marked TL, indicating tubeless construction, while the Dunlop 165R13 example does not use the same tube marking in its size line. The listed 670-15, 590-13, and 640-13 bias-ply products are not all explicitly marked the same way in their size fields, so tube status should be confirmed on the specific tire you select rather than assumed across the whole size.

That is especially important on older wheels, where the tire's construction and the wheel's condition both influence the final setup. A restored car may still have original-style rims, and the right tube decision can differ from one product to another even within the same nominal size. Before mounting, verify the sidewall marking and confirm whether the wheel itself is appropriate for tubeless use or should remain in a tube-type configuration.

A 1957 Borgward should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can age the rubber. Keep the tires clean, maintain inflation, and move the car periodically so one part of the casing is not carrying the load for months at a time. Bias-ply tires are especially prone to temporary flat-spotting during long static storage, while any collector tire can suffer from sidewall aging if the environment is poor.

For a car that sits through a season, many owners either roll it a short distance regularly or support it in a way that reduces constant stress on one patch of tread. The goal is not just cosmetic preservation but casing health and smoother road manners when the car returns to use. If your Borgward rotates between driving and display duty, storage habits can matter just as much as annual mileage.

On a 1957 Borgward, tire age usually matters more than tread wear because collector cars often accumulate miles slowly. A sensible rule is to evaluate tires closely once they reach the five- to seven-year range and to treat around ten years from the DOT date code as a serious replacement threshold even if they still look serviceable. That approach applies whether the car wears bias-ply or radial tires, because age-related hardening and cracking can appear long before the tread is gone.

The best habit is to read the date code on every tire already on the car, including the spare, and not to rely on appearance alone. A Borgward used only for fair-weather drives may still be riding on rubber that has aged beyond its comfortable service window. If the car is newly purchased, one of the first checks should be tire age, because it tells you far more than the shine on the sidewalls.

Tires on a 1957 Borgward should be inspected before every drive and again before any longer outing. Look for sidewall cracking, tread separation signs, bulges, cuts, uneven wear, and pressure loss, and make sure the valve stems are sound. On cars using tube-type setups or products that may require tubes, the condition of the tube-related hardware matters too, because a leak or stem issue can sideline an otherwise healthy-looking tire.

Regular inspection is especially important on a low-use collector car because deterioration often comes from time and storage conditions rather than from obvious road wear. A quick walk-around before local driving is smart, and a more thorough check before a tour or club event is even better. Including the spare in that routine gives you a true backup if the car needs it, rather than a spare that has aged unnoticed for years.

For a 1957 Borgward Isabella, the era points first toward bias-ply construction as the traditional original-type fitment, and the listed Borgward-size options include 590-13 and 640-13 bias-ply tires on 13-inch rims. Radial options such as 165R13 and 175R13 also exist in the modern replacement landscape, but a 1957 European car judged for period authenticity is generally expected to reflect the construction and sidewall style common to its original market specification rather than a later convenience upgrade.

That means a restoration-minded Isabella owner should begin with construction type and sidewall appearance, not just nominal size. Market differences, body style, and prior wheel changes can all affect what is most appropriate, so marque clubs and Borgward specialists remain the best final check for event-level authenticity. Staying in the correct 13-inch family is the foundation, but authenticity is usually decided by the finer details of tire type and appearance.

Correct tire fitment absolutely matters when showing a 1957 Borgward. Judges and knowledgeable enthusiasts commonly notice whether the size, construction type, and sidewall treatment match the character of the car's era. A Hansa or Isabella wearing a visibly modern radial when the restoration theme is strict originality can stand out for the wrong reason, and the same goes for a sidewall style that does not suit the intended market presentation.

The key is matching the tire to the standard you are restoring toward. Some owners aim for authentic 1950s presentation with numeric bias-ply sizing and period-style sidewalls, while others build a driver and accept a more modern radial appearance. If the car will be judged, confirm the event's standards with a Borgward club or marque expert beforehand, because different shows can be more or less strict about construction and sidewall details.

For the 1957 Borgward Isabella, 590-13 and 640-13 are both 13-inch numeric bias-ply sizes, but they are not the same tire. The 590-13 listing carries a 3.50-4.00 inch rim-width range and a maximum load of 970 pounds at 32 psi, while the 640-13 listing carries a 4.00-4.50 inch rim-width range and a maximum load of 1045 pounds at 32 psi. Both are offered in BFGoodrich wide whitewall form, but the 640-13 is the broader and higher-capacity of the two listed sizes.

That difference matters in a restoration because wheel width and the car's intended presentation both come into play. A narrow wheel points naturally toward 590-13, while a wider 13-inch wheel may align better with 640-13. If you are trying to recreate a specific factory or period look, confirm the car's wheel specification and consult Borgward references before choosing between them, because the visual stance can change noticeably even when the rim diameter stays the same.

1957 Borgward tires can be appropriate for highway driving when they are the correct size, in sound condition, and used within their construction and speed limits. Among the listed radial Isabella products in 165R13, H-rated examples are present, and H corresponds to a 130 mph ceiling. Bias-ply options such as 670-15, 590-13, and 640-13 are more about traditional construction and presentation than modern high-speed feel, so the whole car's age, suspension, brakes, and maintenance condition matter just as much as the tire itself in normal highway use.

The practical question is not whether a 1957 Borgward can ever travel on modern roads, but whether your specific car and tires are prepared for the trip. Fresh, correctly inflated tires in the right size are only one part of that answer. Before sustained highway driving, make sure the Borgward is mechanically sorted and that the tire you chose matches the kind of use you expect, especially if the car is being driven farther or faster than it typically sees.

Inflation pressure for 1957 Borgward tires should start with the vehicle's factory recommendation, then be checked against the tire manufacturer's own rated pressure and load information for the exact tire you are using. Among the listed products, 670-15 examples show load ratings such as 1450 pounds at 32 psi and 1550 pounds at 32 psi, the 590-13 shows 970 pounds at 32 psi, and the 640-13 shows 1045 pounds at 32 psi. Those figures are tire ratings, not a universal instruction to inflate every Borgward tire to the same number.

That distinction is important because one Borgward size should not borrow pressure settings from another. A Hansa on 670-15 and an Isabella on 590-13 are not working from the same tire family, and a radial replacement may call for a different operating range than a period-style bias-ply. Use the car's original guidance as the baseline, then confirm the exact tire's sidewall and manufacturer recommendations before settling on your final pressures.

Before taking a 1957 Borgward on a longer drive, inspect every tire for sidewall cracking, cuts, bulges, uneven wear, low pressure, and any sign of age-related hardening. Check the valve stems, and if the car uses a tube-type setup or a product that may require tubes, make sure that part of the system is in equally good condition. The spare should be aired up and inspected too, because a long drive is the wrong time to discover that the backup tire aged out years ago.

A longer outing is also the right moment to think beyond the tires. A Borgward from the 1950s rewards a broader pre-drive inspection that includes brakes, steering, wheel-bearing feel, and fluid checks, since overall roadworthiness is always a package. When the tires, spare, and basic mechanical systems all check out together, the car is far more likely to feel relaxed and trustworthy over distance rather than merely capable of making it around town.