The 2018 Subaru BRZ belongs to a generation of lightweight rear-wheel-drive sport coupes built around sharp steering, balanced chassis response, and a strong connection between driver and road. Buyers looking at this exact model are usually focused on preserving that quick, precise feel rather than simply matching a generic replacement size. Tire fitment centers on two radial sizes, 215/45R17 and 215/40R18, depending on sub-model and wheel package. Available choices stay focused on blackwall performance-oriented BFGoodrich radial offerings across several g-Force series. The key is confirming the exact trim and wheel diameter first, then choosing a tire that suits how the car will actually be driven.
Which Tire Size Is Right for The 2018 Subaru BRZ
The 2018 Subaru BRZ uses two primary tire sizes, and the correct choice depends first on the exact sub-model and wheel diameter. Most versions use a 215/45R17 radial on a 17-inch rim, while the BRZ tS uses a 215/40R18 radial on an 18-inch rim. Before comparing tires, confirm whether the car is on its original wheel setup or has been changed to a different diameter.
Fit(s): Limited, Limited w/Performance Pkg., and Premium
Construction: Radial|Rim: 17 in
215/45R17 is a metric radial size in which 215 identifies the nominal section width in millimeters, 45 is the aspect ratio, R marks radial construction, and 17 is the wheel diameter in inches. On the 2018 Subaru BRZ, this size supports the car's modern sport-coupe fitment on 17-inch wheels. Available choices in this size come from BFGoodrich and include blackwall performance-oriented options in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series. This is the size to evaluate for most BRZ trims, especially when preserving the original 17-inch wheel setup is the priority.
215/40R18 is a metric radial size with a 215-millimeter nominal section width, a 40-series profile, radial construction, and an 18-inch rim diameter. For the 2018 Subaru BRZ, this size is tied to the 18-inch wheel fitment rather than serving as a general replacement across the whole model line. Current choices in this size are blackwall BFGoodrich radial performance tires within the g-Force Sport Comp 2 line. This size should be considered only after confirming that the car is the BRZ tS or is running the proper 18-inch wheel package with the needed clearance.
Sub-model fitment is mostly straightforward on the 2018 Subaru BRZ, but one version uses a different wheel and tire package. Limited, Limited w/Performance Pkg., and Premium models share the same size, while the tS moves to a separate 18-inch fitment, so checking the exact trim matters before ordering tires.
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2018 Subaru BRZ Limited
The 2018 Subaru BRZ Limited uses the 215/45R17 radial tire size. Tire selection for this trim is mainly about comparing available 17-inch blackwall performance tires and confirming that the car still has the correct wheel diameter.
The 2018 Subaru BRZ Limited w/Performance Pkg. also uses the 215/45R17 radial size. That keeps tire choice centered on 17-inch fitment, with the main decision being which available tire series best matches the car's intended street use and feel.
The 2018 Subaru BRZ Premium uses the same 215/45R17 radial tire size found on most BRZ trims. That makes replacement selection relatively simple as long as the original 17-inch wheel setup is still in place and no aftermarket change has altered fitment.
The 2018 Subaru BRZ tS uses the 215/40R18 radial tire size rather than the 17-inch fitment used on other BRZ sub-models. Tire selection for this trim starts with confirming the 18-inch wheels, then choosing among the available blackwall performance-oriented options in that 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 BRZ Tires for Sale
Available 2018 Subaru BRZ tires are centered on BFGoodrich radial performance options in the correct 17-inch and 18-inch sizes. The product grid lets you compare g-Force series choices, all in blackwall styling, along with rim-width compatibility and other key specifications.
These FAQs focus on the exact tire sizes used on the 2018 Subaru BRZ, how fitment changes by sub-model, and what to check when comparing 17-inch versus 18-inch setups, available tire choices, and routine road-use inspection points.
Tire Size & Fitment
What tire size fits a 2018 Subaru BRZ?
The 2018 Subaru BRZ uses two tire sizes: 215/45R17 and 215/40R18. Limited, Limited w/Performance Pkg., and Premium models use 215/45R17, while the BRZ tS uses 215/40R18. Both are radial tire fitments, but they are tied to different wheel diameters, so they are not simply alternate versions of the same setup.
The first step is confirming the exact sub-model and whether the car still has its original wheels. A BRZ that has been changed to aftermarket wheels or a different diameter may no longer match the factory-style size choice, so wheel diameter, rim width, and clearance should be checked before selecting a replacement.
What size rim does a 2018 Subaru BRZ use?
A 2018 Subaru BRZ uses either a 17-inch or 18-inch rim, depending on the sub-model. The 215/45R17 tire size mounts on a 17-inch wheel, while the 215/40R18 tire size mounts on an 18-inch wheel. The wheel diameter is a core part of the tire size, so matching it correctly is essential.
Checking the wheel itself is especially important if the car was purchased used or has been modified. Tire sizing does not begin with sidewall profile or brand choice on this model line; it begins with the actual rim diameter on the car, then moves to the correct tire size and compatible rim-width range.
Do all 2018 Subaru BRZ sub-models use the same tire size?
No. The 2018 Subaru BRZ Limited, Limited w/Performance Pkg., and Premium share the 215/45R17 size, but the BRZ tS uses 215/40R18. That difference means the BRZ line does not have one universal replacement size across every trim, even though all of them use radial construction.
That distinction matters because a 17-inch tire cannot be selected for an 18-inch wheel, and vice versa. Once the trim is confirmed, the next step is comparing tires within that correct size for the intended use, whether the goal is preserving the stock-style setup or matching a later wheel change.
Choosing the Right Tire
What should I consider when choosing a 215/45R17 tire for a 2018 Subaru BRZ?
Start with the correct size and wheel diameter, then compare the available 215/45R17 radial options by tire series, rim-width compatibility, and intended use. For the 2018 Subaru BRZ, this size is offered in several BFGoodrich g-Force lines, all with blackwall styling, so the decision is more about tire character than about appearance changes.
A useful comparison includes how the tire will be used on the street, whether an all-season or more performance-focused design makes sense, and whether the wheel width falls inside the tire's approved range. Load figure, weight, and overall setup should also be reviewed rather than selecting by size alone.
What brands offer tires for the 2018 Subaru BRZ?
The available tires for the 2018 Subaru BRZ are from BFGoodrich in both supported sizes. Within the 215/45R17 fitment, the choices span several g-Force series, while the 215/40R18 fitment is represented by a g-Force Sport Comp 2 option. That keeps brand choice simple but still leaves meaningful variation by tire line.
With one brand in the mix, the real comparison shifts to series design, rim-width suitability, and how closely the tire matches the car's intended street use. A BRZ used for casual driving may call for a different approach than one driven more aggressively, even when both remain within the same size.
What tire series are available for the 2018 Subaru BRZ?
Available tire series for the 2018 Subaru BRZ include BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. The 17-inch 215/45R17 fitment has the widest selection across those series, while the 18-inch 215/40R18 fitment is available in g-Force Sport Comp 2.
Series choice matters because it shapes the kind of driving experience and specification mix you are comparing within the correct size. Once the proper wheel diameter is confirmed, look at rim-width range, load figures where shown, and whether the tire's overall character suits the way the BRZ is actually used.
Restoration & Appearance
Which tire should I choose for a period-style 2018 Subaru BRZ?
A period-style approach on a 2018 Subaru BRZ usually means staying with the correct factory-era wheel diameter and tire size for the exact trim. That points most cars toward 215/45R17 and the tS toward 215/40R18. Since the available options are modern blackwall radial performance tires, the appearance stays close to the BRZ's contemporary sport-coupe character.
The main appearance decision is less about vintage styling and more about preserving the car's original stance and wheel-to-tire proportion. If exact showroom-era presentation matters, compare the current wheel setup to vehicle-specific sales literature, window sticker details, or marque-specific references before selecting a replacement tire.
Does correct tire fitment matter for a 2018 Subaru BRZ restoration?
Yes. Correct tire fitment affects both the visual balance and the driving character of a 2018 Subaru BRZ. Using the proper size for the exact trim helps maintain the intended relationship between wheel diameter, sidewall height, and overall stance, which is especially important on a modern sports coupe built around precise handling.
Restoration-minded buyers should verify whether the car still carries its original wheel diameter before choosing tires. A different wheel package can change the look immediately, and it can also alter fitment needs, so returning the car to a more original-style presentation starts with confirming wheels first and tires second.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Subaru BRZ?
Yes. Modifications can affect tire fitment on a 2018 Subaru BRZ even when the tire size looks close to stock. Aftermarket wheels, suspension lowering, changes in wheel offset, and body or brake upgrades can all alter the space available around the tire, especially on a car with relatively tight sport-coupe clearances.
A BRZ that has been modified should be checked for wheel diameter, wheel width, steering clearance, and fender clearance before replacement tires are chosen. That matters most when switching between 17-inch and 18-inch setups or when a tire is being selected for a car that no longer matches its original trim-specific wheel package.
What should I inspect before driving a 2018 Subaru BRZ on new tires?
Before driving a 2018 Subaru BRZ on new tires, inspect the wheel size, confirm the tire size matches the correct trim, and check inflation, bead seating, and visible clearance around suspension and fender areas. It is also smart to look over the old tires for uneven wear, since that can point to alignment or suspension issues.
A short road test should be followed by another quick inspection for rubbing, air loss, or any unusual steering feel. On a car like the BRZ, tire condition and setup have a noticeable effect on response, so catching a fitment or alignment problem early helps protect both the tires and the way the car drives.
How often should tires on a 2018 Subaru BRZ be inspected?
Tires on a 2018 Subaru BRZ should be inspected regularly, not only when tread looks worn. Pressure, tread condition, cuts, punctures, sidewall damage, and uneven wear should all be checked routinely, especially because performance-oriented coupes can make changes in alignment or inflation more noticeable in day-to-day driving.
Cars that are driven less often still need attention because low-use storage can hide aging, cracking, or gradual air loss. A good habit is to inspect the tires before longer drives and anytime the car feels different in steering or ride, since early detection often prevents a minor issue from becoming a fitment problem.
