Opel Kadett Tires

The Opel Kadett uses one tire size across the 1966 through 1972 year range in this listing: 155R13. The available products for that fitment are both radial tires mounted on 13-inch rims, and one listing specifies an approved rim width range of 4.00 to 5.50 inches. There is no year-to-year size change shown within this Opel Kadett span, which makes the fitment more straightforward than many collector cars from the same era.

That consistency means the first check is not the year alone, but whether the specific Opel Kadett still wears its correct 13-inch wheels. Many older imported cars have had wheel swaps over the years, so read the sidewall on the current tire and verify the wheel diameter before choosing between available replacements.

On an Opel Kadett, 155R13 is a euro-metric radial size. The 155 refers to the tire’s nominal section width in millimeters, the R indicates radial construction, and the 13 identifies the wheel diameter in inches. One of the available Opel Kadett tire listings is marked 155HR13, where the H is a speed rating in the size marking rather than a change to the basic fitment size.

For a buyer, the important point is that 155R13 and 155HR13 belong to the same basic 13-inch fitment family for Opel Kadett applications here. When comparing tires on the car to replacements, match the 155 width and 13-inch rim diameter first, then compare the rest of the sidewall details to the intended driving use.

The Opel Kadett uses a 13-inch rim diameter throughout the 1966 to 1972 range covered here. Both available products are built for 13-inch wheels, and one product also specifies a compatible rim width range of 4.00 to 5.50 inches. There is no rim diameter change within this Opel Kadett year span.

That simplifies selection, but it is still wise to confirm the actual wheel on the car before replacing tires. A Kadett that has been modified or restored with non-original wheels may no longer match the original 13-inch fitment, and wheel diameter must match the tire exactly.

For a 1966 through 1972 Opel Kadett, the listed tire size is 155R13. Since the size does not vary by year in this range, the main confirmation points are the sidewall marking on the tire already fitted to the car and the wheel diameter itself, which should be 13 inches. The available replacement products are both radial tires in that same size family.

A practical approach is to compare three things before choosing: the current sidewall marking, the wheel diameter, and the intended use of the car. If the Opel Kadett has been sitting for years or has passed through several owners, checking those basics avoids buying a correct year-range tire for a car that no longer has its original wheel setup.

The available Opel Kadett tires here are offered in blackwall form. Both listed products, the Michelin and the Dunlop, use blackwall sidewalls rather than whitewall or specialty sidewall treatments. That appearance aligns naturally with the practical European character of the Opel Kadett during the late 1960s and early 1970s.

For restoration-minded owners, blackwall is the correct visual direction to follow from the options offered here. The choice then becomes less about appearance and more about selecting the tire whose tread style, brand preference, and construction details best suit how the Opel Kadett will actually be driven.

Two brands are represented for Opel Kadett fitment in this size: Michelin and Dunlop. The Michelin offering is from the Michelin XAS-FF series, and the Dunlop offering is from the SP Sport Aquajet series. Both are radial blackwall tires built around the same 13-inch Opel Kadett fitment.

That gives Opel Kadett owners a choice between two respected period-style brands rather than a single generic option. Comparing the exact sidewall markings and series names can help a buyer choose a tire that better matches the car’s intended character, whether the goal is a more authentic period presentation or regular vintage road use.

An Opel Kadett should be stored on a clean, dry surface away from direct sunlight, ozone sources, and large temperature swings. Tires last better when they are kept out of prolonged UV exposure and away from electric motors, battery chargers, and furnaces. If the car will sit for long periods, maintaining proper inflation helps preserve the tire’s shape.

For a collector Opel Kadett, rolling the car occasionally or repositioning it can reduce flat spotting during long storage. If the car will be parked for a season or longer, owners often use tire cradles or support the car in a way that avoids concentrating vehicle weight on one small section of each tire.

Tires on an Opel Kadett should be inspected regularly, not just at annual mileage intervals. A collector car can age its tires more from time and storage conditions than from road wear, so sidewalls, tread surface, valve areas, and any signs of cracking or deformation deserve close attention. Air pressure should also be checked before every meaningful drive.

A good routine is to inspect the Opel Kadett before each outing and perform a more thorough examination at least seasonally. If the car has been sitting, check for flat spotting, weather checking, and changes in balance or ride feel once the car is back on the road, since those can signal age-related tire problems.

Tires on an Opel Kadett should be replaced when age, cracking, hardening, bulges, separation, or repeated air-loss issues appear, even if the tread still looks usable. Collector tires often age out before they wear out, especially on a lightly driven car. Visible tread depth alone is not a reliable measure of whether an older tire remains suitable for continued service.

The practical rule is to treat age and condition as seriously as mileage on any vintage Opel Kadett. If the car has spent long periods parked, or if the tires show stiffness and surface checking, replacement is the sensible path even when the tread blocks still appear deep and the car has seen only limited road use.

The available Opel Kadett fitment here centers on 155R13 radial tires, with products in Michelin XAS-FF and Dunlop SP Sport Aquajet series. Those listings establish the correct size family and 13-inch rim diameter for the covered years, but they do not point to a single original-equipment brand across every Opel Kadett application. For a precise restoration, size, sidewall appearance, and period-appropriate series matter more than assuming one universal factory supplier.

Owners pursuing authenticity should compare the car against original manuals, sales literature, surviving delivery photos, or marque-club references. That extra step helps determine whether the goal is a faithful showroom-style restoration or a broadly correct period radial presentation that still respects the Opel Kadett’s original proportions.

Correct tire fitment can absolutely affect how an Opel Kadett is viewed in restoration judging and by informed buyers. Proper size, proper sidewall style, and a tire that visually suits the era all contribute to the car’s overall authenticity. Even on a modestly sized compact, an obviously incorrect tire profile can change stance, appearance, and the period character of the finished restoration.

For owners concerned with show presentation, the safest approach is to keep the Opel Kadett on the correct 155R13 size and choose a blackwall radial that looks appropriate for the car’s late 1960s to early 1970s identity. Marque clubs and period photography remain useful references when the goal is high-level authenticity rather than simple drivability.

For the Opel Kadett, the listed Michelin XAS-FF and Dunlop SP Sport Aquajet series are both radial blackwall tires in the same 155R13 fitment family. The difference is not wheel diameter or basic size compatibility, but the specific tire series and brand approach represented by each product. One Michelin listing is marked 155HR13 78H TL, while the Dunlop listing is marked 155R13 78H.

That means the choice between these Opel Kadett tire series comes down to period preference, sidewall markings, and how closely one series matches the look and feel the owner wants. When a restoration is being judged closely, those series-level details can matter, even when the overall size and rim diameter are the same.

Modern-manufactured radial tires in the correct Opel Kadett size can be appropriate for public-road use when they are properly fitted, correctly inflated, and mounted on sound 13-inch wheels. Both listed Opel Kadett options are radial designs rather than obsolete period casings, which is an advantage for a compact car expected to see regular hobby driving. Tire condition, wheel condition, and overall vehicle mechanical health still matter as much as the size itself.

Before putting an Opel Kadett back into road service, make sure the brakes, steering, suspension, and wheel bearings are as ready as the tires. A correct tire cannot compensate for long-deferred mechanical work, and vintage imported compacts tend to feel much better when the entire chassis is brought back to proper condition.

Before driving an Opel Kadett, check tire pressure, sidewall condition, tread condition, and any signs of age cracking or impact damage. Confirm that all four tires match the intended fitment family and that the wheels are the correct 13-inch diameter. It is also wise to inspect valve stems and look for any air loss if the car has been parked for an extended period.

Once the tire basics are covered, the next checks should be brake feel, steering response, and whether the car rolls smoothly without pull or vibration. A brief low-speed test close to home is a good way to judge whether the Opel Kadett is ready for a longer outing after storage or recent restoration work.

An Opel Kadett should be driven at speeds appropriate to the age and condition of the whole car, not just the tire size marked on the sidewall. The listed products include H-rated markings in this 155R13 family, but a surviving vintage car’s safe operating speed is still limited by suspension condition, braking performance, steering precision, and the age of related components. Tire markings do not override the realities of a half-century-old automobile.

In practical terms, a well-sorted Opel Kadett on fresh, correctly sized radial tires can be used much more confidently than one riding on old, hardened rubber. Even so, owners should build speed gradually, evaluate stability and braking honestly, and reserve higher sustained speeds for cars that have been thoroughly inspected and sorted as complete road machines.