2018 Smart Tire Fitment Guide

2018 Smart vehicles in this range use four radial tire sizes, all on the Fortwo: 165/65R15, 185/60R15, 185/50R16, and 205/45R16. The 15-inch sizes mount on 15-inch wheels, while the 16-inch sizes mount on 16-inch wheels. For the 205/45R16, approved rim width runs from 6.5 to 7.5 inches on the available BFGoodrich products.

That means year and make alone are not enough to choose a tire for a 2018 Smart. You need to confirm whether your Fortwo has the 15-inch or 16-inch wheel package and whether you are replacing the narrower or wider tire position. Checking the sidewall on the tire currently on the car is usually the fastest way to verify that before moving on to product selection.

On a 2018 Smart, 165/65R15 is a metric radial size. The 165 is the nominal section width in millimeters, 65 is the aspect ratio, R means radial construction, and 15 is the wheel diameter in inches. It is one of the 15-inch Fortwo fitments rather than a size shared across every wheel package.

That code matters because a 2018 Smart Fortwo can wear more than one wheel diameter and more than one width depending on position and package. A 165/65R15 cannot simply be substituted for one of the 16-inch sizes, and it should not be chosen just because the car is a Fortwo. Confirming the exact sidewall marking on the tire being replaced keeps the fitment process straightforward.

No. The 2018 Smart range covered here has one model, the Fortwo, but that model uses four different radial tire sizes: 165/65R15, 185/60R15, 185/50R16, and 205/45R16. Those sizes are split between 15-inch and 16-inch wheel packages, and the car's staggered setup means the front and rear positions may not match.

The practical takeaway is that a 2018 Smart owner should identify more than just the model name before choosing a replacement tire. Check the wheel diameter, the sidewall size code, and whether you are replacing a front or rear tire. That extra minute of verification prevents mixing 15-inch and 16-inch fitments or ordering the wrong width for the axle.

For 2018 Smart fitments with product coverage here, the 205/45R16 is available with both Blackwall and RBL sidewall treatments from BFGoodrich. Blackwall gives the tire a plain, modern appearance, while RBL adds a raised black letter look that is more visually expressive. Both are radial tires in the same 16-inch fitment size.

Sidewall style will not change the basic size requirement for a 2018 Smart, but it can change the finished look of the car. Owners who prefer a cleaner factory-like presentation often lean toward Blackwall, while RBL can add a more performance-oriented visual cue. Once the correct 205/45R16 fitment is confirmed, sidewall appearance becomes a styling choice rather than a fitment decision.

BFGoodrich covers the 205/45R16 fitment used on some 2018 Smart Fortwo models. Two BFGoodrich products appear in that size, both in radial construction, with one in Blackwall form and one in RBL form. The available series are g-Force Sport Comp 2 and g-Force Comp 2 A/S.

For a 2018 Smart owner, brand choice is tied closely to the exact size on the car. A Fortwo with 16-inch wheels and the wider 205/45R16 position can focus directly on those BFGoodrich options, while owners with other Fortwo sizes should first confirm the sidewall code before narrowing down brand and series. Starting with the size always keeps the search more accurate than starting with brand preference alone.

For the 2018 Smart 205/45R16 fitment, both BFGoodrich choices share the same size, the same 16-inch rim diameter, the same 6.5 to 7.5-inch rim-width range, the same 22-pound weight, and a W speed rating with a 168 mph ceiling. The visual difference is sidewall style, with the g-Force Sport Comp 2 in Blackwall and the g-Force Comp 2 A/S in RBL form. The g-Force Comp 2 A/S also carries an 87W XL marking and a maximum load figure of 1,074 pounds at 50 psi.

That makes the comparison less about basic fitment and more about details that matter once size has already been settled. A 2018 Smart owner choosing between them should compare the sidewall appearance they want and any load-marking preference on the tire itself. Since both share the same size and wheel-width guidance, the deciding factors are the product's exact construction details and the visual character it brings to the car.

Rim-width guidance is confirmed here for the 2018 Smart 205/45R16 fitment, which works with 6.5 to 7.5-inch rim widths on the available BFGoodrich products. That size also uses a 16-inch rim diameter, which must match the tire code exactly. The 15-inch Smart sizes and the 185/50R16 size should still be matched against the actual wheel on the car before final selection.

Rim width matters because a 2018 Smart uses compact, axle-specific tire sizing rather than one interchangeable all-around fitment. Even when the diameter is correct, the wheel still needs to fall within the tire maker's approved width range. If your Fortwo has aftermarket wheels or a replacement wheel from another trim, check the wheel stamp or manufacturer specification before mounting a new tire.

The 2018 Smart fitments covered here are modern radial sizes, and the available 205/45R16 products do not carry a tube-type marking. That points buyers toward modern tubeless-style fitment rather than vintage tube-type practice. Any replacement should still be matched to the tire's own sidewall marking and to the condition of the wheel itself.

For most 2018 Smart owners, that means tube questions are secondary to making sure the wheel is clean, undamaged, and suited to the radial tire being installed. If a wheel has corrosion, bead-seat damage, or prior repair work, address that before mounting a new tire. A fresh valve stem and a proper leak check are also worthwhile whenever a tire is installed on a modern small car.

No single original 2018 Smart wheel can cover all four sizes, because the Fortwo uses both 15-inch and 16-inch rim diameters. The 165/65R15 and 185/60R15 sizes belong to 15-inch wheels, while the 185/50R16 and 205/45R16 sizes belong to 16-inch wheels. The 205/45R16 also requires a wheel width within the approved 6.5 to 7.5-inch range.

That means an original 2018 Smart wheel can be reused only when its diameter and width match the tire size being installed. Owners moving between wheel packages should not assume the tires can swap over just because they fit the same model. Verifying the wheel's actual dimensions before mounting keeps the tire properly supported and avoids clearance or seating problems.

A 2018 Smart should be stored on a clean, dry surface away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age rubber. Keep the tires inflated to the vehicle's operating pressure, move the car periodically if possible, and avoid letting it sit for long periods with one contact patch carrying the same load. Modern radials resist flat spotting better than older bias-ply designs, but they still benefit from regular movement during storage.

Those habits matter on a lightly used city car because age often affects the tires before tread wear does. If your 2018 Smart sits through winter or spends much of its life parked, a simple monthly roll or short drive can help maintain shape and pressure consistency. For longer layups, clean the tires, keep the car out of standing moisture, and inspect the sidewalls before returning it to the road.

On a 2018 Smart, tire age is usually more important than mileage alone. A sound rule is to begin close inspection by about five to seven years of age and to treat around ten years as the point where replacement deserves serious consideration regardless of tread depth. The DOT date code on the tire sidewall is the most reliable way to determine actual age.

That approach is especially useful for a 2018 Smart Fortwo because many of these cars are low-mileage urban vehicles that can keep plenty of tread long after the rubber has started to harden. Cracking, vibration, loss of wet-weather confidence, or repeated pressure loss are all signs to look more closely. A tire that appears cosmetically decent can still be aged out, so age should always be part of the replacement decision.

Tires on a 2018 Smart should be checked before every drive and given a more thorough inspection before any longer outing. Look for sidewall cracking, cuts, punctures, bulges, uneven tread wear, and any change in how well the tire holds pressure. On a car with staggered sizing, also make sure the correct size remains on the correct axle position.

Frequent inspection is worthwhile because a 2018 Smart depends heavily on small-diameter, relatively short-sidewall tires that can react quickly to pressure loss or curb damage. If the car has been parked for a while, inspect all four tires and the spare before heading out. A quick pressure check and visual walk-around often catch the kind of problem that is easy to miss on a lightly driven collector or commuter vehicle.

Yes, when the correct size is fitted, the tires are in good condition, and the vehicle is mechanically sound, 2018 Smart tires are suitable for normal highway use. The available 205/45R16 BFGoodrich products carry a W speed rating, which corresponds to a 168 mph ceiling. In real-world use, the tire's speed capability is far beyond the speeds a Fortwo normally sees, so tire age, inflation, alignment, and the car's own chassis condition matter more than the rating alone.

For a 2018 Smart owner, safe highway use starts with matching the exact sidewall size and keeping all four tires in healthy condition. Because the Fortwo is a short-wheelbase city car, crosswinds, suspension wear, and pressure differences can affect stability more noticeably than on a larger car. A fresh, correctly matched set of tires and a basic pre-trip inspection go a long way toward making highway driving feel more settled.

Inflation pressure on a 2018 Smart should follow the factory recommendation on the car's tire placard or in the owner's manual, matched to the exact front and rear size in use. For the available 205/45R16 BFGoodrich g-Force Comp 2 A/S, the tire carries a maximum load of 1,074 pounds at 50 psi, but that maximum-pressure figure is not the same thing as the vehicle's everyday operating pressure. Pressure should always be set by the vehicle requirement first, not by copying a maximum from the sidewall.

That distinction matters because the Fortwo uses staggered sizes and can have different recommended pressures by axle and wheel package. If you are replacing only one pair of tires, confirm the placard values before inflating them. Checking pressure cold, rather than after driving, gives the most consistent reading and helps the tire carry load the way the car's engineers intended.

Before a longer trip in a 2018 Smart, inspect each tire for cracking, cuts, punctures, bulges, abnormal wear, and proper cold inflation pressure. Confirm that the 15-inch or 16-inch sizes on the car are matched correctly to their wheel diameters and axle positions, and make sure the valve stems are in good shape. It is also wise to inspect the spare if the car has one, along with the basic tools needed to deal with a flat.

Tires are only one part of the pre-drive picture on a compact modern city car, so include brakes, lights, fluids, and suspension condition in the same check. A 2018 Smart that spends most of its life on short trips can hide age-related issues because it is not driven hard or far very often. Giving the car a thorough once-over before a highway run helps catch problems while they are still easy to address.