The 1972 Citroen SM stands apart as a grand touring car from an era when Citroen combined advanced engineering, distinctive styling, and high-speed road manners in a way few contemporaries matched. Its long, low shape and sophisticated chassis make tire choice more than a routine maintenance decision, because the right size helps preserve both stance and driving character. This model uses a 195R15 radial tire on a 15-inch rim, so the focus is less about sorting through multiple fitments and more about selecting the right radial within that established size. For an owner balancing road use, appearance, and careful preservation, getting the size and wheel compatibility right is the essential starting point.
Which Tire Size Is Right for The 1972 Citroen SM
The 1972 Citroen SM uses one primary tire size: 195R15 radial on a 15-inch rim. The same fitment applies to the covered SM Base configuration, so the main decision is not between multiple factory-size options, but whether the tire you choose preserves the correct overall fit, proper wheel compatibility, and the look you want for road use or long-term ownership.
A 195R15 is a Euro-metric radial size in which 195 represents nominal section width in millimeters, R indicates radial construction, and 15 identifies the wheel diameter in inches. Because this format does not state an aspect ratio, it is commonly understood as an older metric radial sizing style rather than a modern low-profile designation. On a 1972 Citroen SM, this size keeps the discussion centered on selecting the proper radial fitment for the car’s original wheel diameter and overall presentation. It is the size to evaluate when preserving the car’s intended proportions and confirming compatibility with the wheels currently on the vehicle.
Tire fitment is straightforward across the covered 1972 Citroen SM sub-model listing. The SM Base uses the same 195R15 radial size, so sub-model identification matters less than confirming the actual wheel setup and overall condition of the vehicle before selecting tires.
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1972 Citroen SM Base
The 1972 Citroen SM Base uses the 195R15 radial tire size on a 15-inch rim. That keeps tire selection focused on finding the right radial in the correct vintage metric format while verifying that the car still carries the proper wheels and has no clearance issues from later modifications.
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.
Frequently Asked Questions
These 1972 Citroen SM tire FAQs focus on the 195R15 radial fitment, 15-inch wheel compatibility, vintage metric sizing, restoration-minded appearance, and the checks that matter before putting a collector-era grand touring car back on the road.
Tire Size & Fitment
What tire size fits a 1972 Citroen SM?
The 1972 Citroen SM uses a 195R15 radial tire. That is the primary fitment for this model year and it is an older Euro-metric radial size rather than a modern P-metric designation.
Using the correct size matters because the SM’s proportions and road manners depend on a tire that matches the intended wheel diameter and general dimensional profile. A car that has been modified or fitted with different wheels over time should have its actual rim size and available clearance checked before a new set is selected.
What size rim does a 1972 Citroen SM use?
The 1972 Citroen SM uses a 15-inch rim with its 195R15 tire size. That wheel diameter is part of the basic fitment, since the final number in the tire size must match the wheel the tire mounts on.
Rim diameter is the first thing to confirm before ordering replacement tires, especially on a collector car that may have changed hands several times. Measuring the actual wheel and checking its width and condition helps avoid choosing a tire that matches the vehicle on paper but not the wheels currently installed.
Does the 1972 Citroen SM Base use the same tire size?
Yes. The 1972 Citroen SM Base uses the same 195R15 radial size. There is no separate primary tire size for that covered sub-model, which keeps fitment more straightforward than on vehicles with trim-level tire changes.
That consistency means the buying decision usually comes down to choosing the right tire within the correct size rather than sorting through multiple factory fitments. It is still worth confirming the wheels on the car, since older vehicles are often fitted with replacement rims or other changes that can affect practical tire selection.
Choosing the Right Tire
What should I consider when choosing a 195R15 tire for a 1972 Citroen SM?
Start with the correct 195R15 size and radial construction, since that is the established fitment for the 1972 Citroen SM. The main selection factors are proper wheel compatibility, overall tire dimensions within this vintage metric format, and whether the tire suits the car’s intended use as a road-going collector grand tourer.
A careful choice should also reflect the condition and setup of the specific car. An SM with original-style wheels calls for different scrutiny than one with later wheel changes, and even when the size is right, sidewall shape, clearance at full steering lock, and the car’s overall presentation should all be considered before mounting.
How do I choose between available 195R15 tires for a 1972 Citroen SM?
The best way to compare 195R15 options for a 1972 Citroen SM is to stay focused on fitment first and then weigh the tire’s visual character and intended use. Tires in the same nominal size can still differ in how they suit a preservation-minded car versus one driven regularly on modern roads.
Wheel compatibility and clearance should be checked before appearance becomes the deciding factor. Once those basics are confirmed, the choice becomes more about whether the owner wants a traditional presentation, a touring-oriented road setup, or a balance between vintage style and practical drivability on a car known for its distinctive design.
What rim-fitment details should I compare when choosing 1972 Citroen SM tires?
The critical rim-fitment detail is the 15-inch wheel diameter required by the 195R15 tire size. Beyond diameter, the wheel’s actual width and overall condition also matter, because an older radial tire choice should be matched to a sound wheel that supports the tire properly.
A visual check alone is not always enough on a car of this age. Measuring the wheel, confirming there is no damage or distortion, and making sure the tire sits correctly within the wheel opening all help prevent fitment surprises. Those checks are especially important if the SM has seen wheel replacements or long-term storage.
Restoration & Appearance
Which tire should I choose for a period-style 1972 Citroen SM?
A period-style approach starts with the correct 195R15 radial size, because the 1972 Citroen SM was built around that vintage metric radial fitment. Staying with the proper size helps preserve the car’s distinctive stance and avoids turning the tire decision into a modern-size experiment.
For a restoration-oriented car, appearance should work with fitment rather than override it. Owners seeking exact historical accuracy should compare any final tire choice against marque references and vehicle-specific documentation, while drivers focused more on presentation and road use can still keep the car visually convincing by maintaining the correct size and wheel diameter.
Does correct tire fitment matter for a 1972 Citroen SM restoration?
Yes, correct tire fitment matters on a 1972 Citroen SM restoration because the car’s visual balance depends heavily on proper tire proportion. Using the 195R15 radial size keeps the restoration grounded in the fitment that matches the SM’s 15-inch wheel setup.
A tire that departs too far from the original sizing approach can change the car’s stance and the way it fills the wheel openings, even before the car moves. Restoration-minded owners should confirm wheel dimensions, inspect suspension condition, and choose a tire that supports the desired appearance without assuming every similarly labeled modern alternative will suit the car equally well.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1972 Citroen SM?
Yes. Modifications can affect tire fitment on a 1972 Citroen SM even when the tire size remains 195R15. Changes to wheels, suspension height, or body clearance can alter how much room the tire has and whether it remains appropriate for the vehicle’s current setup.
That is why the actual car should be checked before assuming any replacement tire will behave the same way as the previous one. Wheel width, offset, steering clearance, and suspension condition all influence usable space, and those details become especially important on collector vehicles that may have been altered decades after they left regular service.
What should I inspect before driving a 1972 Citroen SM on new tires?
Before driving a 1972 Citroen SM on new tires, inspect the wheels, valve stems, and mounting surfaces, and make sure the 195R15 tires are properly seated and inflated. It is also wise to check for suspension wear, brake issues, and any signs that the old tires may have been masking alignment or clearance problems.
A brief driveway check is not enough on a car that may have spent long periods parked. Looking for rubbing marks, verifying steering movement lock to lock, and confirming that the tires hold pressure after installation can help catch problems early. A gradual road test is the sensible next step before any longer trip.
How should 195R15 tires on a collector 1972 Citroen SM be maintained?
195R15 tires on a collector 1972 Citroen SM should be maintained with regular pressure checks, routine visual inspection, and careful storage habits. Because collector cars are often driven infrequently, age and storage damage can become just as important as tread wear.
Periodic inspection should include looking for sidewall cracking, bulges, cuts, flat spotting, and slow air loss. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires between drives, and moving the vehicle occasionally can help reduce the stress that long static periods place on an older touring car.
