1956 Borgward Tire Fitment Guide

1956 Borgward vehicles use six sizes across two model lines. The Hansa uses 195R15 and 670-15, both on 15-inch rims. The Isabella uses 165R13, 590-13, 175R13, and 640-13, all on 13-inch rims. Where rim-width guidance is available, 670-15 appears on 4.50- to 6.00-inch ranges depending on product, 165R13 on 4.50- to 6.00-inch rims, 590-13 on 3.50- to 4.00-inch rims, and 640-13 on 4.00- to 4.50-inch rims.

Model identification comes first because Hansa and Isabella do not share wheel diameter. Once you know the model, the next step is deciding whether you are following a traditional bias-ply fitment or a radial fitment that still stays within the proper rim diameter for that model. On an Isabella in particular, confirm the exact size already on the car or supported by your restoration goal before choosing between the smaller and larger 13-inch options.

A 670-15 tire on a 1956 Borgward is a numeric bias-ply size. The 6.70 figure is the nominal section width in inches, and the 15 is the wheel diameter in inches. On Borgward applications for 1956, 670-15 belongs to the Hansa and represents a traditional mid-century sizing system rather than a later metric radial code.

That matters because a 670-15 is not just a different number from 195R15; it also reflects a different construction era and a different driving character. If your Hansa is being restored with emphasis on original appearance, sidewall style, and period road feel, 670-15 is the fitment family to examine first. It is also the Hansa size with the broadest product choice, including blackwall and wide whitewall offerings from several brands.

A 165R13 tire on a 1956 Borgward is an older Euro-metric radial size. The 165 is the nominal section width in millimeters, the R identifies radial construction, and the 13 is the wheel diameter in inches. When no aspect ratio is printed in this style of size, it conventionally indicates an approximately 80-series profile rather than a modern low-profile tire.

On a 1956 Borgward, 165R13 belongs to the Isabella and keeps the car within its 13-inch wheel diameter while moving into a radial format associated with later European driving manners. That can be attractive on an actively driven Isabella, but the exact product still matters. Some examples carry tubeless markings and H speed ratings, so it is worth checking the sidewall details of the specific tire you are considering rather than assuming every 165R13 is identical.

For a 1956 Borgward Hansa, the choice between 670-15 and 195R15 is mainly a choice between traditional bias-ply construction and radial construction within the same 15-inch wheel diameter. The 670-15 follows the original-style numeric bias-ply convention and has the broadest selection, including blackwall and wide whitewall versions. The 195R15 uses an older Euro-metric radial format and points toward a later-style European radial setup rather than a period bias-ply presentation.

Choose by goal before you choose by brand. A show-focused or authenticity-minded Hansa owner will usually begin with 670-15, while a driver who prefers a radial-type feel will naturally look at 195R15. Since both belong to the Hansa and share 15-inch diameter, the final check is making sure the exact product matches your wheel width, sidewall preference, and the way you intend to use the car.

1956 Borgward tire sidewall styles vary by size. The Hansa's 670-15 bias-ply offerings include both blackwall and wide whitewall choices, while the Isabella's 165R13 radial products are blackwall. The Isabella's 590-13 and 640-13 bias-ply products are wide whitewall. Sidewall style is not just cosmetic on a collector car; it strongly affects whether the tire looks appropriate for the car's market character and restoration direction.

A blackwall radial usually gives a more understated European look, which can suit a driven Isabella well. Wide whitewalls lean more heavily into period presentation and are often chosen when the visual goal is a more formal mid-1950s appearance. If you are restoring for judged events or trying to match old photos of your particular car, verify whether your intended look is conservative blackwall or whitewall before narrowing down brand and construction.

Several brands cover 1956 Borgward tire sizes. The Hansa's 670-15 bias-ply size is available from Firestone, US Royal, Coker Classic, and Universal Vintage Tire. The Isabella's 165R13 radial size is available from Michelin and Dunlop, while 590-13 and 640-13 bias-ply sizes are offered by BFGoodrich. Brand choice therefore depends on which Borgward model and size you are dealing with first.

That split is useful because it keeps you from comparing unlike tires across different model families. A Hansa owner choosing among 670-15 products can focus on sidewall style, rim-width suitability, and load listing, while an Isabella owner in 165R13 will be comparing blackwall radial products instead. Once the model and size are fixed, brand becomes a way to refine the look and specification rather than solve the basic fitment question.

Rim-width guidance for 1956 Borgward tires depends on the size. In the listed products, 670-15 appears with ranges of 4.50 to 5.00 inches on some tires and 5.00 to 6.00 inches on others. The 165R13 radial appears with a 4.50- to 6.00-inch range. The 590-13 bias-ply uses 3.50- to 4.00-inch rims, and the 640-13 bias-ply uses 4.00- to 4.50-inch rims.

Those ranges show why the tire decision should not stop at the size code alone. Two tires in the same nominal size can call for different wheel-width windows, especially in older reproduction lines. Before committing to a specific tire for a Hansa or Isabella, measure the actual wheel or verify it against factory wheel specifications so the chosen tire sits correctly and maintains the profile the manufacturer intended.

Inner-tube status varies by size and sometimes by product on 1956 Borgward tires. The listed 165R13 Michelin products carry TL tubeless markings, while the Dunlop 165R13 example does not use the same marking in its size description. The 670-15, 590-13, and 640-13 bias-ply listings do not present a uniform tube notation in the size field, so they should be treated as product-specific decisions rather than assumed one way or the other.

Tube use on an older car also depends on the wheel itself, not just the tire. Original wheels, wheel condition, and the exact tire construction all matter, especially on collector vehicles with older rim designs. Before mounting tires on a 1956 Borgward, confirm the sidewall marking on the exact product and make sure the wheel is appropriate for tubeless service if you intend to run it that way.

Within each 1956 Borgward model family, the available sizes share the same rim diameter. The Hansa's 195R15 and 670-15 are both 15-inch sizes, and the Isabella's 165R13, 175R13, 590-13, and 640-13 are all 13-inch sizes. That means the diameter match is present within each model's tire family rather than forcing a wheel-diameter change between the listed options.

Diameter compatibility is only the first part of the check. Wheel width still has to suit the specific tire you choose, and that is especially important when moving between different constructions or between narrower and wider 13-inch Isabella sizes. If the car still wears original wheels, confirm their actual width before assuming every 13-inch or 15-inch option within that model can be mounted interchangeably.

A 1956 Borgward should be stored out of direct sunlight, away from electric motors, battery chargers, welders, and other ozone-producing equipment, with the tires kept clean and dry. Maintain inflation, move the car periodically if practical, and avoid letting it sit for very long periods on one contact patch. Bias-ply tires are more prone to temporary flat-spotting during storage than radials, so Hansa and Isabella owners using bias-ply sizes may notice that trait more readily after the car has been parked.

Good storage habits preserve both appearance and drivability on a collector Borgward. If the car will be parked for a season, consider using tire cradles or supporting the vehicle in a way that reduces long-term stress while still following safe storage practice. A cool, stable indoor environment does more for tire life than low mileage alone, especially on a car that is driven occasionally rather than every week.

Tires on a 1956 Borgward should be judged more by age and condition than by miles traveled. On collector cars, many owners begin serious evaluation around five to seven years and treat about ten years as a point where replacement deserves strong consideration regardless of tread depth. The DOT date code, overall sidewall condition, and the way the tire has been stored all matter more than odometer readings on a low-use vintage car.

That approach is especially important for a Borgward because a car that sees occasional weekend use can still be riding on old rubber that looks acceptable at a glance. Cracking, hardening, and long-term air-loss behavior are better indicators than remaining tread alone. If the tires came with the car and their age is unclear, checking the date code and giving each tire a close inspection is a smart first step before planning regular road use.

Tires on a 1956 Borgward should be inspected before every drive and again before any extended outing. Look for sidewall cracking, cuts, bulges, uneven wear, embedded debris, and changes in inflation. Pay attention to whether the car has developed a pull, vibration, or repeated pressure loss. If your chosen tire setup involves tube-type service, valve stems and tube-related leakage points deserve just as much attention as the tread and sidewall.

Frequent inspections suit the way collector cars are actually used. A Borgward may sit for weeks, then be asked to handle a club event or a highway trip with little warning, and storage time can hide problems until the car is moving again. A short pre-drive walkaround with a pressure check will catch most age-related issues early and reduces the chance of discovering them after you are already on the road.

A 1956 Borgward Isabella belongs to an era when bias-ply tires were still standard equipment on most production cars, even as radial technology was becoming increasingly important in Europe. The Isabella size mix here includes both bias-ply options, 590-13 and 640-13, and radial options, 165R13 and 175R13. That means a restorer should treat bias-ply as the likely baseline for strict period authenticity, while recognizing that radial-type fitments also belong to the broader European context of the decade.

Original fitment can still vary by market, wheel, and how a car was delivered or later updated. If you are restoring a 1956 Borgward Isabella for marque judging, confirm the exact expectation with Borgward specialists, period literature, or club resources before finalizing a size and sidewall style. For many owners, the real choice is whether the car should present as a factory-correct mid-1950s sedan or as a thoughtfully maintained driver using an era-appropriate radial format.

Correct tire fitment matters on a 1956 Borgward because judges and knowledgeable enthusiasts notice more than tread depth. Size, construction type, and sidewall style all affect whether the car looks faithful to its era and intended market presentation. A radial on a car judged for strict originality, or a whitewall style that does not suit the restoration goal, can stand out immediately even if the tire physically fits the wheel.

Showing standards are not identical across every event, so the right answer depends on whether you are building for high-level concours, marque-club authenticity, or a more relaxed local display. A Hansa on 670-15 bias-ply tires and an Isabella on one of its bias-ply 13-inch sizes will generally align more closely with mid-1950s expectations than a modern-looking substitute. Check the event rules and the habits of your specific Borgward community before making the final call.

For a 1956 Borgward Isabella in 165R13, both the Michelin XAS and Michelin XAS-FF appear in 165HR13 82H TL form. Each uses radial construction, blackwall styling, a 13-inch rim diameter, and a 4.50- to 6.00-inch rim-width range. The clearest listed difference between them is series designation and weight, with the XAS-FF shown at 20 pounds and the XAS shown at 9 pounds.

That means the choice is not about basic fitment, since both belong to the same size family and carry the same H-rated format in the listing. Instead, the decision turns on which Michelin series best suits your restoration or driving preference within the Isabella's 165R13 radial category. Before selecting one, compare the exact product description and confirm the sidewall markings you want, since visually similar radial products can still appeal to different owners.

1956 Borgward tires can be suitable 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, H speed ratings appear, which correspond to a 130 mph ceiling. The bias-ply Borgward sizes shown here do not carry the same speed-letter format in the listing. On a mid-1950s Borgward, the car's brakes, suspension, steering condition, and overall mechanical state are usually more limiting in real highway use than the theoretical top speed of a reproduction tire.

Safe road use starts with realism. A Hansa or Isabella on fresh, properly fitted tires can be driven confidently at normal modern-road speeds if the rest of the car is equally well sorted, but old-car habits still apply: allow extra braking distance, avoid sustained high-speed running on aged tires, and keep pressures correct. For a collector car, tire age and condition matter just as much as the size printed on the sidewall.

Inflation pressure on a 1956 Borgward depends on the exact tire size and product. Among the listed bias-ply options, 670-15 appears with load listings of 1450 pounds at 32 psi and 1550 pounds at 32 psi depending on the tire, 590-13 is listed at 970 pounds at 32 psi, and 640-13 at 1045 pounds at 32 psi. Those are tire load-and-pressure ratings, not universal vehicle settings. The correct running pressure for the car should still be checked against Borgward literature or established marque guidance for the specific model.

Do not transfer one pressure figure from a Hansa tire to an Isabella tire, or from a bias-ply product to a radial, just because the numbers seem close. Tire manufacturers state the pressure tied to a tire's rated load, while the car maker specifies what the vehicle wants in service. Start by identifying the exact tire, then compare the car's original recommendation with the modern reproduction tire's published guidance before setting final pressure.

Before a longer drive in a 1956 Borgward, inspect each tire for cracking, cuts, bulges, irregular wear, and proper inflation, then check the spare as carefully as the four road tires. Look over valve stems, and if your setup uses tube-type service, give extra attention to leakage and stem condition. Make sure lug hardware is secure and that the tires are not rubbing due to wheel or suspension issues. A longer outing asks more of an old car than a short neighborhood trip.

The tires are only one part of the checklist, but they are the part actually touching the road. On a mid-1950s Borgward, it also makes sense to confirm brake feel, steering free play, fluid levels, and lighting before setting out. If the car has been stored recently, take a short local test drive first so you can feel for flat spots, pulling, vibration, or heat buildup before committing to the full distance.