1967 Sunbeam Imp Tires

The 1967 Sunbeam Imp uses two primary tire sizes: 155R12 in radial construction and 5.50-12 in bias-ply construction. Both sizes are associated with the same 12-inch rim diameter, so the main fitment decision is not wheel diameter alone but which construction and sizing format best matches the car and your intended use.

That means a Sunbeam Imp owner should start by confirming the wheels currently on the car and then decide whether the goal is a traditional period-style bias-ply setup or a radial-style fitment. On older cars, wheel changes over time are common, so matching the tire to the actual wheel and checking clearance is more important than assuming every surviving car still wears its original setup.

The 1967 Sunbeam Imp uses a 12-inch rim with both of its primary tire sizes. The 155R12 radial and the 5.50-12 bias-ply both share that 12-inch wheel diameter, which simplifies basic fitment but does not eliminate the need to verify the wheel itself before choosing a tire.

Rim diameter is only one part of the picture on a vintage compact car. The actual wheel width, the condition of the wheel, and any later wheel substitutions should still be checked before mounting tires. That is especially important when moving between bias-ply and radial construction, because the rim may have the correct diameter while still needing closer review for compatibility and overall fit.

The 1967 Sunbeam Imp Base follows the same fitment pattern, using either a 155R12 radial or a 5.50-12 bias-ply tire. Both options are built around a 12-inch rim, so the Base model does not introduce a separate wheel diameter or a unique size outside the core fitment choices.

That makes tire selection more about the type of tire than about hunting for a special sub-model-only size. A Base owner should still verify what is already on the car, because many collector vehicles have been updated over the years. Confirming the current wheel and choosing the construction that suits the car's appearance and road use will usually be the next practical step.

On the 1967 Sunbeam Imp, 5.50-12 is a bias-ply tire size. It uses a vintage numeric format, with 5.50 indicating nominal section width in inches and 12 indicating the wheel diameter. That makes it the more traditional construction choice associated with the Imp's period-style tire presentation.

Bias-ply and radial tires can change the feel and look of a small vintage car, so the decision should be made deliberately rather than by size code alone. A buyer considering 5.50-12 should confirm the wheel setup and think about whether the goal is restoration-minded appearance, occasional road use, or a shift toward radial construction while staying within the correct 12-inch rim diameter.

For the 1967 Sunbeam Imp, 155R12 is a radial tire size. In that size code, 155 is the nominal section width in millimeters, R designates radial construction, and 12 identifies the 12-inch rim. It stands apart from the 5.50-12 option by using a later metric-style radial format instead of a vintage numeric bias-ply format.

That distinction matters because choosing 155R12 is not just a change in labeling; it is also a change in construction type. Before moving to a radial setup, the owner should confirm the actual wheel width and overall condition of the wheels, then check that the tire works cleanly with the car's clearance, stance, and intended use rather than assuming all 12-inch wheels are equally suited.

A 1967 Sunbeam Imp can be fitted with either a 5.50-12 bias-ply tire or a 155R12 radial, so the right choice depends on what you want from the car. Bias-ply keeps a more traditional period-style approach, while the radial option follows the alternate primary fitment path available for this model.

The practical decision usually comes down to appearance goals, wheel compatibility, and how the car will be driven. A restoration-oriented owner may prefer the vintage sizing and presentation of 5.50-12, while someone planning more regular road use may look closely at 155R12. Either way, the current wheel setup and tire clearance deserve a careful check before settling on one construction.

Start with the basics: the 1967 Sunbeam Imp uses either a 5.50-12 bias-ply tire or a 155R12 radial on a 12-inch rim. The key choice is construction, because each size represents a different approach to the car's fitment rather than two unrelated wheel diameters.

From there, think about how the car is used and how you want it to look. A period-style restoration often points toward the bias-ply size, while a radial-format setup may appeal to owners focused on regular road miles. It also makes sense to verify wheel width, inspect the wheels themselves, and compare the current setup on the car before choosing one tire path over the other.

Choosing between 5.50-12 and 155R12 for a 1967 Sunbeam Imp begins with deciding whether you want bias-ply or radial construction. The two sizes share a 12-inch rim diameter, so the selection is less about a larger or smaller wheel and more about matching the tire type to the car's setup and purpose.

A useful way to narrow the choice is to separate appearance goals from driving goals. Owners preserving a more traditional visual character often start with 5.50-12, while owners considering a radial-format fitment may focus on 155R12. Before committing, compare the tire against the wheel currently on the car and confirm that suspension, steering, and body clearance remain appropriate.

The first rim-fitment detail for a 1967 Sunbeam Imp is simple: both primary tire sizes use a 12-inch rim. After that, attention should move to the actual wheel width, the wheel's condition, and whether the car still has its original-style wheels or a later substitute that changes how a bias-ply or radial tire sits.

Those checks matter because two wheels can share the same diameter and still differ in ways that affect tire selection. A compact vintage car like the Imp benefits from careful confirmation of wheel width and clearances before mounting new tires. Looking at the current wheel and tire combination on the car often prevents choosing a size or construction that is correct in theory but awkward in practice.

For a period-style 1967 Sunbeam Imp, the 5.50-12 bias-ply size is the natural starting point because it uses the vintage numeric sizing format and traditional bias-ply construction. That combination generally aligns more closely with the sort of tire presentation enthusiasts expect to see on a small British-rooted car from the mid-1960s.

Appearance goals still need to be balanced against the actual wheel setup and intended road use. Some owners want the car to look as traditional as possible, while others are comfortable with a radial-format 155R12 for a different driving experience. If exact originality matters, compare the tire choice with marque references or period documentation before making a final decision.

On a restored 1967 Sunbeam Imp, tire construction influences the car's overall visual character as much as the size code itself. A 5.50-12 bias-ply presents the car in a more traditional vintage style, while a 155R12 radial introduces a later metric-format look even though both fit the same 12-inch wheel diameter.

That difference is worth considering before a restoration is finalized, especially on a compact car where tire shape and sidewall presence are easy to notice. Matching the tire to the intended era and presentation can help the finished car look more cohesive. It is also smart to verify the wheels already on the car, since a restoration may include wheel changes made by previous owners.

Yes, modifications can affect tire fitment on a 1967 Sunbeam Imp even when the car is staying with a 12-inch wheel diameter. Changes such as aftermarket wheels, altered wheel width, suspension work, ride-height changes, or body repairs can influence how either a 5.50-12 bias-ply or 155R12 radial sits in the car.

That is why the actual setup on the vehicle matters more than assumptions based on age alone. A quick check of wheel dimensions, steering travel, and fender clearance can prevent avoidable problems after installation. On a small vintage car, even modest changes can make a noticeable difference, so treating fitment as car-specific is the safest approach.

Before driving a 1967 Sunbeam Imp on new tires, inspect the wheels, confirm the tire size and construction match the intended setup, and look over the suspension and steering for obvious wear. It also helps to check inflation, lug hardware, and basic tire-to-body clearance once the new tires are mounted.

A short, careful road test is a smart next step on a collector vehicle that may sit for long periods. Listen for rubbing, watch for pulling or vibration, and recheck pressures after the first drive. Even with brand-new tires, aged wheel components or long-neglected alignment issues can affect how the car behaves once it is back on the road.

Tires on a collector 1967 Sunbeam Imp should be maintained with regular pressure checks, visual inspections, and close attention to age-related deterioration. On a lightly used vintage car, sidewall cracking, flat spotting, bulges, cuts, and slow air loss can matter just as much as tread depth, especially if the car spends long periods parked.

Storage conditions also play a major role in tire life. Keeping the Imp away from prolonged heat, direct sunlight, moisture, and ozone sources can help preserve the tires between drives. It is also wise to inspect the car before longer outings rather than assuming low mileage means the tires are ready, since time and storage often affect collector tires more than distance.