1960 Borgward Tire Fitment Guide

1960 Borgward vehicles in this range use four 13-inch tire sizes, all on the Isabella: 165R13, 590-13, 175R13, and 640-13. The radial 165R13 products fit 4.50- to 6.00-inch rims, 590-13 bias-ply products fit 3.50- to 4.00-inch rims, and 640-13 bias-ply products fit 4.00- to 4.50-inch rims. All four sizes share the same 13-inch rim diameter, but they do not share the same rim-width requirements or construction type.

That means a 1960 Borgward owner should think beyond rim diameter alone. A 13-inch wheel may still be too narrow or too wide for a given tire, and a radial-versus-bias choice changes the car’s feel as much as its appearance. Checking the wheel width already on the car is the fastest way to narrow the correct range before deciding between a period-style bias-ply fitment and a radial alternative.

On a 1960 Borgward, 590-13 is a traditional numeric bias-ply size. The final number, 13, is the rim diameter in inches, while the leading 590 designation is an older section-width code rather than a modern metric measurement. In current reproduction form for the Isabella, 590-13 appears as a bias-ply tire with a wide whitewall sidewall and a rim-width range of 3.50 to 4.00 inches.

That size appeals most to owners restoring an Isabella to a strongly period-correct look, especially if the car wears narrow original-style wheels. It should not be treated as interchangeable with every other 13-inch option just because the rim diameter matches. Wheel width, visual profile, and intended use all matter, so the next step is confirming the wheel itself before committing to a 590-13 setup.

On a 1960 Borgward, 165R13 is a Euro-metric radial size. The 165 refers to section width in millimeters, the R identifies radial construction, and the 13 is the rim diameter in inches. In period European sizing, a tire written this way without an aspect ratio is commonly understood as an 80-series radial. For the Isabella, 165R13 appears in blackwall radial form and fits 4.50- to 6.00-inch rims.

That makes 165R13 a useful choice for owners who want a size that feels at home on a European car of the era while still benefiting from radial construction. It is especially important to confirm wheel width here, because this radial fitment expects a wider rim range than the narrow 590-13 bias-ply option. Sidewall styling is also different, so appearance may steer the decision as much as dimensions.

A 1960 Borgward owner choosing between 590-13 and 165R13 is mainly choosing between bias-ply and radial construction, not between two unrelated wheel diameters. Both fit 13-inch rims, but 590-13 is a traditional bias-ply fitment with a wide whitewall presentation and a narrower approved rim range, while 165R13 is a blackwall radial with a wider rim-width range and H-rated examples in current production.

If the goal is restoration character and a more period-authentic visual impression, 590-13 makes sense. If the goal is a European radial fitment that aligns more naturally with regular road use, 165R13 is often the more practical direction. The deciding factors should be your wheel width, the look you want, and whether the car is being judged for authenticity or driven often enough that radial behavior matters to you.

1960 Borgward tire choices span two distinct sidewall looks. The radial 165R13 options come in blackwall form from Michelin and Dunlop, while the bias-ply 590-13 and 640-13 options use wide whitewall sidewalls from BFGoodrich. That split gives the Isabella owner a clear visual difference between the radial and bias-ply paths, not just a construction difference beneath the surface.

For a 1960 European car like the Borgward Isabella, blackwall radials tend to suit a restrained continental appearance, while wide whitewalls create a more stylized vintage presentation. Which one is more appropriate depends on the market style you are trying to echo and the way the finished car is meant to read. If originality matters for judging, compare your intended sidewall style with period photos and marque-club guidance before finalizing the tire.

1960 Borgward vehicles are covered by Michelin, Dunlop, and BFGoodrich across the available Isabella sizes. Michelin and Dunlop appear in the 165R13 radial category, while BFGoodrich covers the 590-13 and 640-13 bias-ply whitewall sizes. That gives the Isabella owner both European-flavored radial choices and a traditional American-brand bias-ply whitewall option within the same 13-inch wheel family.

Brand selection here usually follows the broader direction of the car. Owners leaning toward a European touring presentation often start with Michelin or Dunlop in 165R13, while owners pursuing a stronger vintage bias-ply look often focus on BFGoodrich in 590-13 or 640-13. It helps to choose the size and construction first, then compare the brand options that exist within that narrower lane rather than starting with the badge on the sidewall alone.

Rim width depends on the exact tire size you choose for a 1960 Borgward. The 165R13 radial products fit rims from 4.50 to 6.00 inches wide, the 590-13 bias-ply fits 3.50 to 4.00 inches wide, and the 640-13 bias-ply fits 4.00 to 4.50 inches wide. All of these tires mount on 13-inch rims, but the approved wheel-width windows are meaningfully different from one size to the next.

That difference matters because many Isabella cars have been restored, modified, or re-wheeled over time. Measuring the actual wheel width on the car is more reliable than assuming the current tire is correct. Once wheel width is confirmed, you can rule out sizes that fall outside the safe range and focus on the tires that make sense both physically and visually for the way your 1960 Borgward is set up.

Tube requirements for 1960 Borgward tires depend on the exact product. The Michelin 165R13 radial offerings are marked TL, which identifies them as tubeless products, while tube marking can vary by product presentation across the broader fitment range and should be checked on the tire you intend to use. Bias-ply fitments in vintage applications may also depend on wheel design and condition, not just the tire itself.

The practical step is to inspect the wheels before mounting anything. Original or restored wheels can differ in how well they suit tubeless use, especially on older collector cars. If you are working with original Isabella wheels, have the rim condition, valve area, and bead seats evaluated, then match the tire’s sidewall marking and manufacturer guidance to the wheel rather than assuming every 13-inch tire for a 1960 Borgward is handled the same way.

A 1960 Borgward Isabella uses 13-inch tires across all four available sizes, so the rim diameter itself is consistent. That means the original wheel diameter can support more than one tire size in principle, but wheel width still has to match the tire. A narrow wheel suited to 590-13 may not be appropriate for 165R13, and a wheel that works with 165R13 may fall outside the intended range for the narrowest bias-ply fitment.

The best approach is to treat original-wheel compatibility as a two-step check: confirm that the wheel is 13 inches in diameter, then measure its width before selecting a tire. That keeps you from forcing a modern radial onto a wheel that is too narrow or choosing a bias-ply size that does not sit correctly on a wider rim. Diameter compatibility is only the beginning of proper tire fitment on a 1960 Borgward.

A 1960 Borgward should be stored in a cool, dry space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can accelerate sidewall cracking. Keep the tires properly inflated during storage, and move the car periodically so it does not sit in one spot for months at a time. Bias-ply tires such as 590-13 and 640-13 are especially prone to flat-spotting during long static storage compared with radial options.

If the car will be parked for an extended season, many owners either roll it occasionally or support it in a way that reduces prolonged loading on one contact patch. A clean floor, stable temperature, and protection from moisture matter as much as the tire itself. Good storage habits preserve ride quality, help maintain sidewall appearance, and reduce the chance that your 1960 Borgward feels harsh or thumpy on the first drive back out.

Tires on a 1960 Borgward should be judged more by age than mileage. On collector vehicles that see limited use, many owners begin evaluating tires closely once they reach about five to seven years of age, and replacement becomes a serious consideration as they approach ten years, even if tread depth still looks good. The DOT date code on the tire is the best starting point for determining age.

That age-based approach matters because an Isabella may cover only a small number of miles each year while still spending long periods under load or exposed to storage conditions that harden the rubber. Sidewall cracking, loss of flexibility, and changes in how the tire holds pressure are more meaningful than odometer readings on a vintage car. A tire that looks presentable can still be past its prime if it is simply too old.

Tires on a 1960 Borgward should be inspected before every drive and again before any longer trip. Look for sidewall cracks, cuts, bulges, irregular tread wear, and changes in pressure retention, and give extra attention to valve stems and any tube-type installation hardware where applicable. Collector cars often spend more time parked than driven, which means age-related issues can appear even when tread wear is minimal.

A quick walk-around before each outing is one of the simplest ways to catch a problem early. On a longer tour, it is wise to inspect the spare as well, since an old spare may be the weakest tire on the car even if it has never touched the road. Regular inspection also helps you notice alignment or suspension issues that may show up first in the tread pattern rather than in obvious mechanical symptoms.

For a 1960 Borgward Isabella, bias-ply construction would have been the normal original-era expectation, even though radial sizes are also used on the car today. The available Isabella fitments span both bias-ply numeric sizes such as 590-13 and 640-13 and radial metric sizes such as 165R13 and 175R13. That mix reflects the transition period many European cars occupy in the collector world, where owners may choose either authenticity-minded bias-ply tires or later-style radial replacements.

If your goal is factory-style presentation, start by confirming the exact tire size and sidewall treatment against period literature, unrestored examples, or a Borgward marque specialist. Market differences, body style, and restoration interpretation can all influence what is considered correct. The safest rule is that a 1960 Isabella restored for originality usually points you toward bias-ply construction first, with sidewall styling then refined from there.

Correct tire fitment matters on a shown 1960 Borgward because judges and knowledgeable enthusiasts often notice tire size, construction type, and sidewall appearance immediately. A bias-ply whitewall tire gives a very different visual and historical impression than a blackwall radial, even if both mount on 13-inch wheels. On a car being judged for authenticity, a modern-looking radial can stand out just as much as an incorrect width or an out-of-character sidewall treatment.

That does not mean every shown Isabella must wear the same tire, but it does mean your tire choice should match the standard you are aiming for. Local show judging can be lenient, while marque-focused or concours-style events may be more exacting. Before finalizing your setup, compare your intended size and sidewall look with period reference material and ask the relevant club or event organizers what they regard as acceptable for a 1960 Borgward.

For the 1960 Borgward Isabella in 165R13, Michelin XAS and Michelin XAS-FF share the same basic size marking, blackwall sidewall style, tubeless construction, H speed rating, 13-inch rim diameter, and 4.50- to 6.00-inch rim-width range. The clearest measurable difference here is weight, with the XAS-FF shown at 20 pounds and the XAS at 9 pounds. Both sit in the same radial fitment lane rather than serving different wheel diameters or sidewall presentations.

That means the choice between them is usually about product preference within the same fitment family rather than one being the only correct option for an Isabella. Since their core dimensional fitment is aligned, the practical questions become how closely you want to match a certain period style and which version best suits the role of the car. Keeping the comparison inside the same 165R13 radial category helps avoid overcomplicating the decision.

1960 Borgward tires can be suitable for highway driving when they are the correct size, properly mounted, in good condition, and used within their ratings. The 165R13 radial choices include H-rated examples, which carry a 130 mph ceiling, far beyond ordinary highway speeds. Bias-ply options such as 590-13S and 640-13S are traditional vintage-style tires and should be driven with an understanding of their older construction feel, especially on a car whose brakes, suspension, and overall road manners come from a 1960 design era.

For most owners, the larger safety question is not whether the tire can tolerate modern traffic in theory, but whether the entire Isabella is prepared for the trip. Tire age, inflation, alignment, wheel condition, and general mechanical readiness all matter. A fresh, correctly fitted tire on a well-sorted 1960 Borgward is far more reassuring than an old tire with good tread on a car that has not been inspected thoroughly.

Inflation pressure on a 1960 Borgward should follow the vehicle recommendation first and the tire manufacturer’s rated limits second. Among the available bias-ply sizes, 590-13 is associated with 970 pounds at 32 psi and 640-13 with 1,045 pounds at 32 psi. Those figures are load-and-pressure references for those specific tires, not a universal inflation setting for every Borgward size. Radial sizes such as 165R13 should be matched to the guidance for that exact tire and the car’s intended operating condition.

The safest approach is to consult the Isabella’s original literature or a marque specialist for the car’s baseline pressure recommendation, then confirm that your chosen reproduction or radial tire is being used appropriately within its own rating structure. Avoid transferring a pressure figure from one size to another just because both fit 13-inch wheels. Construction type, tire dimensions, and wheel width all influence how a 1960 Borgward should be set up.

Before a longer drive in a 1960 Borgward, inspect each tire for cracking, cuts, bulges, embedded debris, uneven wear, and proper inflation, then check the spare as carefully as the road tires. Confirm that valve stems are in good condition, and pay special attention to any installation that uses tubes or older wheels that may have been in service for decades. A tire that has aged quietly in storage can be a bigger risk than one that has simply accumulated miles.

That tire check should be part of a wider pre-drive routine suited to an older European car. Wheel fastener security, brake feel, fluid levels, lighting, and general suspension condition all deserve attention before a sustained outing. The point is not to make a 1960 Borgward feel fragile, but to respect that a vintage car asks for more preparation than a modern daily driver, especially if it has been used sparingly.