The 2018 Subaru Impreza sits in the modern compact segment with the all-weather practicality and everyday drivability that made Subaru’s all-wheel-drive cars such a familiar sight on American roads. For buyers at this level, the tire decision is tied closely to trim because wheel and tire sizing step up as the car moves from Base and Premium to Limited and Sport. This Impreza uses three primary radial sizes: 205/55R16, 205/50R17, and 225/40R18. Available choices range from blackwall performance-oriented series to whitewall radial options in the smaller sizes. The key is matching the exact sub-model and wheel diameter before comparing sidewall style, tire character, and overall presentation.
Which Tire Size Is Right for The 2018 Subaru Impreza
Three primary tire sizes apply to the 2018 Subaru Impreza, and they vary by sub-model and wheel diameter. The first step is identifying whether the car is a Base, Premium, Limited, or Sport, then confirming whether it is on 16-inch, 17-inch, or 18-inch wheels. Once that is settled, the decision shifts to comparing radial tire choices by brand, sidewall style, and tire series within the correct size.
205/55R16 is a metric radial size in which 205 is the nominal section width in millimeters, 55 is the aspect ratio, R identifies radial construction, and 16 is the wheel diameter in inches. On the 2018 Subaru Impreza, this size serves the 16-inch wheel fitment used on selected trims and keeps the buyer in a modern radial format. Available options include BFGoodrich, Michelin, and American Classic choices, with both blackwall and wide whitewall sidewall treatments. It is the size to evaluate when the car retains its 16-inch wheel setup and the goal is balancing correct fitment with appearance and tire character.
205/50R17 follows the same metric radial sizing system, with a 205-millimeter section width, a 50-series profile, radial construction, and a 17-inch rim diameter. For the 2018 Subaru Impreza, this is the 17-inch trim-specific fitment and should be selected only after confirming that wheel diameter on the car. BFGoodrich, American Classic, and Vredestein offerings create meaningful variety here, including blackwall performance-oriented tires and a wide whitewall radial option. This size is the right place to compare tire series and sidewall presentation when the Impreza is equipped with the factory-style 17-inch wheel setup.
225/40R18 uses a wider 225-millimeter section width with a lower 40-series profile, radial construction, and an 18-inch wheel diameter. On the 2018 Subaru Impreza, this size belongs to the 18-inch fitment and brings a distinctly different wheel-and-tire package than the 16-inch and 17-inch sizes. Product choices here center on blackwall radial performance series from BFGoodrich and Nitto rather than appearance-driven whitewall options. It is the size to consider when the car is on 18-inch wheels and the priority is matching that lower-profile fitment before comparing series details and rim-width compatibility.
Sub-model fitment matters on the 2018 Subaru Impreza because tire size changes with trim. Base and Premium share one setup, while Limited and Sport move to different wheel diameters, so confirming the exact sub-model is the cleanest way to avoid choosing the wrong size.
1
2018 Subaru Impreza Base
The 2018 Subaru Impreza Base uses the 205/55R16 radial size on a 16-inch wheel. Tire selection here is mainly about choosing among available blackwall or wide whitewall options and comparing tire series once the 16-inch setup is confirmed.
The 2018 Subaru Impreza Limited uses the 205/50R17 radial size on a 17-inch wheel. That makes wheel-diameter confirmation especially important before comparing blackwall and whitewall offerings or sorting through the available tire series in this trim-specific fitment.
The 2018 Subaru Impreza Premium shares the 205/55R16 radial size with the Base model. For this sub-model, the main choice is not fitment complexity but deciding which 16-inch tire best suits the car’s appearance and intended road use.
The 2018 Subaru Impreza Sport uses the 225/40R18 radial size on an 18-inch wheel. That lower-profile setup should be matched carefully, with attention to wheel width and overall fitment before comparing the blackwall performance-oriented options available in this size.
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 2018 Subaru Impreza Tires for Sale
Available 2018 Subaru Impreza tire choices span 16-inch, 17-inch, and 18-inch radial fitments from BFGoodrich, Michelin, American Classic, Vredestein, and Nitto. Buyers can compare blackwall and wide whitewall styles, along with series such as g-Force, Sprint Plus, NT555 G2, and American Classic Radial.
These FAQs focus on the tire sizes used on the 2018 Subaru Impreza, how trim level affects fitment, and what to compare when choosing among radial tire options, sidewall styles, wheel sizes, and road-use checks.
Tire Size & Fitment
What tire size fits a 2018 Subaru Impreza?
The 2018 Subaru Impreza uses three tire sizes depending on sub-model: 205/55R16, 205/50R17, and 225/40R18. Base and Premium models use 205/55R16, Limited uses 205/50R17, and Sport uses 225/40R18. All of these are radial tire fitments matched to different wheel diameters.
Choosing the right one starts with confirming the exact trim and the wheel diameter currently on the car. That matters even more if the Impreza has had wheel changes, because a Base or Premium may no longer be on 16-inch wheels, and a used car may not still have its original setup.
What size rim does a 2018 Subaru Impreza use?
A 2018 Subaru Impreza uses three rim diameters depending on sub-model and tire size: 16-inch rims with 205/55R16 tires, 17-inch rims with 205/50R17 tires, and 18-inch rims with 225/40R18 tires. The tire size and rim diameter need to match exactly because each size is built for a specific wheel diameter.
The practical step is to verify the actual wheel on the car before ordering tires, especially on a vehicle that may have changed hands. Looking only at the model name is not enough when this generation uses multiple wheel sizes across the trim range.
Do all 2018 Subaru Impreza sub-models use the same tire size?
No. The 2018 Subaru Impreza uses different tire sizes across its sub-models. Base and Premium share 205/55R16, Limited uses 205/50R17, and Sport uses 225/40R18. Even though all are radial fitments, the wheel diameters and tire profiles are not the same from one trim to another.
That means the safest starting point is the trim badge and wheel diameter, not a general search for 2018 Impreza tires. On an unmodified car that usually resolves the fitment quickly, while a car with aftermarket wheels should be checked by actual tire size and wheel measurement.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Subaru Impreza?
Start with the correct size for the exact sub-model and wheel diameter, because the 2018 Subaru Impreza uses 205/55R16, 205/50R17, or 225/40R18 depending on trim. From there, compare radial tire series, sidewall style, rim-width compatibility, and any load figures that apply to the specific tire you are considering.
The right choice depends on how the car is used and how you want it to look. A blackwall tire keeps a modern appearance, while available whitewall options in the 16-inch and 17-inch sizes create a very different visual presentation that should be chosen deliberately rather than by size alone.
What sidewall styles are available for 2018 Subaru Impreza tires?
Sidewall style depends on the tire size chosen for the 2018 Subaru Impreza. Blackwall tires are available across all three fitments, while wide whitewall options appear in 205/55R16 and 205/50R17 through American Classic Radial. The 225/40R18 fitment is centered on blackwall selections.
That gives smaller-wheel trims more flexibility if appearance matters as much as fitment. A whitewall can change the car’s visual character noticeably, so it makes sense to confirm both the correct size and the intended look before narrowing the choice to a particular tire series.
What brands offer tires for the 2018 Subaru Impreza?
Tires for the 2018 Subaru Impreza are available from BFGoodrich, Michelin, American Classic, Vredestein, and Nitto, depending on size. BFGoodrich appears across all three fitments, while Michelin and American Classic are present in smaller sizes, Vredestein appears in 205/50R17, and Nitto appears in 225/40R18.
Brand choice is only part of the decision. The more useful comparison is which brand offers the right size, sidewall treatment, rim-width range, and tire series for the specific trim level. That approach keeps the choice grounded in fitment first instead of treating every brand as available in every size.
Restoration & Appearance
Which tire should I choose for a period-style 2018 Subaru Impreza?
A period-style approach on a 2018 Subaru Impreza still begins with the correct trim-specific size: 205/55R16, 205/50R17, or 225/40R18. From there, the appearance decision comes from the tire’s sidewall treatment and overall presentation, with blackwall options across the range and wide whitewall choices available in the 16-inch and 17-inch fitments.
Because this is a modern car, appearance goals usually center on personal style rather than strict restoration standards. Matching the original wheel diameter used by the specific sub-model keeps the look more coherent, while any departure in sidewall style should be chosen with the car’s intended visual theme in mind.
How does tire construction affect the appearance of a restored 2018 Subaru Impreza?
Construction is straightforward on the 2018 Subaru Impreza because all primary fitments here are radial. The appearance difference comes less from bias-ply versus radial and more from the profile and sidewall style tied to each trim-specific size, especially when comparing 16-inch, 17-inch, and 18-inch wheel packages.
A taller-profile 205/55R16 presents differently than a lower-profile 225/40R18, even before brand or series enters the picture. For an appearance-focused build, keeping the wheel diameter and tire profile aligned with the intended trim-level look will usually matter more than chasing an alternative construction that was never part of this fitment group.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Subaru Impreza?
Yes. Wheel, suspension, and body changes can affect tire fitment on a 2018 Subaru Impreza even when the tire size seems close to stock. Different offsets, wider wheels, lowering springs, or suspension wear can change clearance at the fender, strut, and steering components, especially on the 18-inch Sport-style fitment.
That is why the current wheel diameter and width should be checked before selecting tires for a modified car. Even within the correct nominal size, the real-world fit depends on the wheel setup and available clearance, so a changed Impreza should be evaluated by measurement rather than trim name alone.
What should I inspect before driving a 2018 Subaru Impreza on new tires?
Before driving a 2018 Subaru Impreza on new tires, inspect the wheel size, confirm the tire size matches the trim, and check that each tire is properly mounted and inflated. It also helps to look over the wheels for damage and make sure valve stems, lug hardware, and tread direction are all correct.
A short road test should be followed by another look for rubbing, uneven seating, or air loss. Any Impreza that has aftermarket wheels, suspension changes, or previous accident repair deserves extra attention because those factors can affect clearance and alignment even when the tire size itself is correct.
How should tires on a 2018 Subaru Impreza be inspected and maintained?
Tires on a 2018 Subaru Impreza should be inspected regularly for pressure loss, irregular wear, cuts, bulges, and sidewall damage. Because this car uses low-profile and trim-specific radial sizes, maintaining the correct pressure and catching alignment-related wear early is especially important for preserving ride quality and even tread use.
Routine checks are most useful when they include the wheels as well as the tires. Looking for curb damage, vibration, or unusual wear patterns can reveal problems before they affect road manners, and any car that sits for longer periods should still have its tires checked for age, cracking, and flat spotting.
