The 1971 Opel Kadett reflects the compact European-car formula that made small, efficient sedans and wagons so appealing in the early 1970s. Light weight, simple proportions, and modest dimensions give the Kadett a very different tire-selection story than larger American classics. For this exact model, the primary fitment is a 155R13 radial on a 13-inch rim, which keeps the focus on choosing the right version of one established size rather than sorting through multiple factory fitments. Available options center on blackwall radial tires from Michelin and Dunlop. The real decision comes down to maintaining the Kadett’s period European look while confirming wheel compatibility and overall roadworthiness.
Which Tire Size Is Right for The 1971 Opel Kadett
The 1971 Opel Kadett uses one primary tire size: 155R13. It is a radial fitment for a 13-inch rim, and that same size is shared across the covered Base and Kadett Wagon sub-models. That means the main choice is not between multiple factory sizes, but between available tire lines, brand character, and making sure the car still has the correct wheel setup before installation.
A 155R13 size uses a 155-millimeter nominal section width, radial construction, and a 13-inch rim diameter. In this older Euro-metric format, the aspect ratio is not printed in the size code and is commonly associated with a tall-profile radial layout. On a 1971 Opel Kadett, that construction suits the car’s original compact European fitment character rather than a wide modern tire presentation. Available choices include Michelin and Dunlop blackwall radials in distinct tire series, giving owners room to balance period-style appearance, brand preference, and wheel compatibility within the correct size family.
Tire fitment is straightforward across the covered 1971 Opel Kadett sub-models. The Base and Kadett Wagon share the same 155R13 radial size, so the key checks are wheel condition, wheel width, and whether the car still wears its intended 13-inch setup.
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1971 Opel Kadett Base & Kadett Wagon
The 1971 Opel Kadett Base & Kadett Wagon uses the tire sizes shown below. Confirm the wheel diameter and intended use before choosing a product.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1971 Opel Kadett Tires for Sale
Current 155R13 choices for the 1971 Opel Kadett focus on blackwall radial tires from Michelin and Dunlop. The available options span the Michelin XAS-FF and SP Sport Aquajet series, with differences in brand, tire line, and rim-width compatibility worth comparing in the product grid.
These FAQs for the 1971 Opel Kadett focus on the 155R13 fitment, 13-inch rim compatibility, product selection, period-style appearance, and the checks that matter before putting a lightly used vintage compact back on the road.
Tire Size & Fitment
What tire size fits a 1971 Opel Kadett?
The 1971 Opel Kadett uses a 155R13 radial tire. That size applies across the covered Base and Kadett Wagon sub-models, making fitment more straightforward than on vehicles that used multiple tire sizes by trim or package.
Even with one primary size, it is still smart to confirm that the car has the correct 13-inch wheels and has not been changed to a different wheel package over the years. Vintage compacts are often modified, and wheel swaps can affect what tire actually belongs on the car today.
What size rim does a 1971 Opel Kadett use?
The primary tire fitment for the 1971 Opel Kadett is built around a 13-inch rim. That matches the 155R13 tire size, where the final number in the size code identifies the rim diameter in inches.
Rim diameter is only part of the fitment picture, so the wheel’s actual width and condition still matter before mounting new tires. A Kadett with replacement steel wheels or aftermarket wheels should be measured rather than assumed, especially if the car has been restored or modified at some point.
Do all 1971 Opel Kadett sub-models use the same tire size?
The covered 1971 Opel Kadett sub-models share the same tire size. Both the Base and Kadett Wagon use a 155R13 radial, so there is no split fitment here between the listed versions of the car.
That shared size simplifies shopping, but it does not eliminate the need to inspect the actual wheel setup on the vehicle. A wagon or sedan that has seen decades of service may have replacement wheels, and that can change the practical tire choice even when the original fitment size remains the same.
Choosing the Right Tire
What should I consider when choosing a 155R13 tire for a 1971 Opel Kadett?
Start with the correct size, which is 155R13, and make sure the tire is intended for a 13-inch wheel. Since this Kadett uses a radial fitment, the next factors are the tire line, wheel-width compatibility, and the type of driving the car actually sees.
A lightly driven restoration may prioritize period European character and traditional blackwall appearance, while a regularly exercised car may place more emphasis on overall condition and compatibility with the existing wheels. Comparing brand, series, load figures where available, and wheel fitment details will help narrow the best match.
What sidewall styles are available for 1971 Opel Kadett tires?
The available 155R13 tires for a 1971 Opel Kadett use a blackwall sidewall style. That keeps the presentation clean and consistent with the understated look many small European cars of this era carried on the road.
Sidewall style matters more than many owners expect because it strongly affects the finished appearance of the car. On a compact Kadett, a simple blackwall usually looks visually appropriate, so the main comparison shifts away from sidewall decoration and toward the tire series, brand, and wheel compatibility.
What brands offer tires for the 1971 Opel Kadett?
Michelin and Dunlop both offer applicable 155R13 radial tires for the 1971 Opel Kadett. The available tire lines include Michelin XAS-FF and Dunlop SP Sport Aquajet, giving buyers a choice between recognized period-style European tire families in the correct size range.
Brand choice should be weighed alongside fitment details rather than treated as the only decision. Looking at rim-width guidance, overall tire specifications, and the character you want for the car will produce a better result than choosing only by name, especially on a vintage compact with modest wheel and clearance margins.
Restoration & Appearance
Which tire should I choose for a period-style 1971 Opel Kadett?
A period-style approach for a 1971 Opel Kadett starts with the correct 155R13 radial size and a traditional blackwall presentation. That preserves the compact European look of the car better than moving to a visibly wider or more modern-looking tire format.
From there, the choice becomes one of tire line and wheel compatibility rather than broad appearance changes. Owners pursuing a highly exact restoration should compare the tire’s look with period photos, marque references, and vehicle-specific documentation, since correct size alone does not automatically settle every originality question.
Does correct tire fitment matter for a 1971 Opel Kadett restoration?
Correct tire fitment matters on a 1971 Opel Kadett because the car’s proportions are small and the tire has a strong effect on stance and visual balance. Staying with the proper 155R13 radial format helps maintain an appearance that looks appropriate to the vehicle’s era and design.
Restoration-minded owners should also think beyond the side view. Wheel width, ride height, and any prior suspension or wheel changes can alter how the tire sits in the body opening, so verifying the full setup helps preserve both the look of the car and the practical fitment needed for road use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1971 Opel Kadett?
Yes, modifications can affect tire fitment on a 1971 Opel Kadett even though the original size is straightforward. Changes such as aftermarket wheels, altered suspension height, brake conversions, or bodywork repairs can all influence how a 155R13 tire sits and clears the car.
A Kadett that still uses its stock-style wheel setup is simpler to match, but an altered car should be checked carefully before ordering tires. Wheel diameter, wheel width, and inner and outer clearance deserve attention first, since even a correct nominal tire size can behave differently on a changed chassis.
What should I inspect before driving a 1971 Opel Kadett on new tires?
Before road use, inspect the wheels for damage or corrosion and make sure the tires are mounted on the correct 13-inch rims. It also helps to check for uneven wear, air retention, valve-stem condition, and any signs that alignment or suspension issues could affect the new tires.
A vintage Kadett that sits for long periods deserves extra attention to brakes, steering components, and wheel bearings before any meaningful drive. New tires improve one part of the car’s readiness, but they cannot compensate for worn mechanical parts or a chassis that has developed looseness over time.
How should 155R13 tires on a collector 1971 Opel Kadett be maintained?
Collector-car 155R13 tires should be checked regularly for air pressure, sidewall cracking, tread condition, and signs of age-related deterioration. Since many vintage Kadetts are driven infrequently, tire condition can decline from time, storage, and environment even when tread wear remains minimal.
Storage habits matter as much as mileage on a lightly used car. Keeping the Kadett away from prolonged sunlight, ozone sources, and damp conditions can help preserve the tires, and occasional inspections before each outing are worthwhile because a car that looks road-ready can still be riding on aging rubber.
