2019 Subaru WRX STI Tires

The 2019 Subaru WRX STI uses two primary tire sizes depending on sub-model. Base, Limited, and Series.Gray models use 245/35R19, while the STI S209 uses 265/35R19. Both are radial tires built for 19-inch wheels, but the wider S209 fitment should not be assumed to apply across the rest of the STI range.

The practical step is to confirm the exact sub-model before choosing a tire. Once that is settled, compare the tire size already on the car with the intended fitment and make sure the wheel width matches the tire’s requirements, especially if the car has been changed from its original wheel setup.

Both tire sizes used on the 2019 Subaru WRX STI are built around a 19-inch rim diameter. That applies to the 245/35R19 fitment used on Base, Limited, and Series.Gray models as well as the 265/35R19 fitment used on the S209. Rim diameter is consistent even though the tire width changes by sub-model.

That consistency helps narrow the search, but diameter alone does not finish the fitment decision. Wheel width still matters, particularly with lower-profile performance tires, so it is smart to confirm the actual wheel dimensions on the car before selecting between available tires in the proper 19-inch size.

No. The 2019 Subaru WRX STI Base, Limited, and Series.Gray share the 245/35R19 size, while the S209 uses 265/35R19. All of them use radial construction on 19-inch wheels, but the S209 stands apart with a wider primary fitment that calls for its own tire selection.

That means the badge on the car matters before anything else. A buyer looking at an STI that has aftermarket wheels or replacement tires should check the current wheel and tire setup carefully, since a changed width or modified suspension can blur the difference between factory-style sizing and a later custom installation.

Start by making sure the car is a Base, Limited, or Series.Gray, since those are the STI sub-models that use 245/35R19. From there, compare the available radial choices by brand, tire series, blackwall presentation, and wheel-width compatibility where it is stated. That keeps the decision centered on the correct fitment rather than just picking any 19-inch performance tire.

A careful comparison should also include intended use and supporting specifications. Some 245/35R19 options include stated rim-width ranges and load figures, which can help narrow the field if the car sees regular street driving or uses a wheel that falls near the outer edge of the acceptable width range.

BFGoodrich and Nitto both offer tires for the 2019 Subaru WRX STI in the sizes used here. Across 245/35R19 and 265/35R19, the available lineup includes BFGoodrich g-Force series options and Nitto NT555 G2 tires, all in radial construction with blackwall sidewalls. That gives buyers a focused but meaningful performance-tire choice set.

Brand alone should not make the decision. It is more useful to compare the exact tire series available in the correct sub-model size, then look at wheel-width compatibility, load details where stated, and the kind of driving the car actually sees. That approach keeps the selection tied to fitment rather than just name recognition.

The 2019 Subaru WRX STI is covered here by several series, including BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Phenom T/A, BFGoodrich g-Force Sport Comp 2, and the Nitto NT555 G2. Series availability varies by tire size, so the 245/35R19 and 265/35R19 fitments do not present exactly the same menu.

That makes the first decision the correct sub-model size, followed by the series that matches the car’s intended use and wheel setup. Looking at the product grid by size helps separate all-season versus more overtly performance-oriented naming and shows where rim-width or load details may matter in the final comparison.

A period-style approach for a 2019 Subaru WRX STI starts with keeping the correct factory-era sizing format and sub-model fitment. That means 245/35R19 for Base, Limited, and Series.Gray models, and 265/35R19 for the S209, all in modern radial construction. Since the available products here are blackwall tires, the visual presentation stays aligned with contemporary performance-car styling.

Appearance alone should not outweigh correct fitment. A clean period-style result usually comes from matching the right width to the right sub-model, then checking that the wheel dimensions and stance still reflect the car’s intended setup. Cars with altered ride height or aftermarket wheels deserve an extra fitment check before final selection.

Yes, correct tire fitment matters because the 2019 Subaru WRX STI relies on a low-profile 19-inch package that strongly affects its stance and overall presentation. Using the proper 245/35R19 or 265/35R19 size for the exact sub-model keeps the car visually coherent and avoids mixing the standard STI fitment with the S209’s wider setup.

A restoration-oriented owner should also pay attention to details beyond the sidewall. The actual wheel width, ride height, and fender clearance all influence how authentic and settled the car looks once the tires are mounted, so verifying the full wheel-and-tire package is just as important as choosing the correct size code.

Yes. A 2019 Subaru WRX STI can become much more sensitive to fitment changes once aftermarket wheels, suspension lowering, spacers, or alignment changes enter the picture. That matters even when staying with the original size code, and it matters even more if a standard STI has been changed toward an S209-style wider tire and wheel setup.

The safest approach is to measure what is actually on the car before replacing tires. Check wheel width, confirm the 19-inch diameter, and look for any signs that steering or fender clearance is already tight. A careful inspection helps avoid choosing a tire that matches the label but conflicts with the current modified setup.

Before road use, inspect the wheel-and-tire package as a system. Make sure the tire size matches the sub-model, check inflation pressure, and look over the wheels for damage that could affect sealing or balance. It is also worth confirming that the tires clear suspension components and fenders at normal ride height and through steering travel.

A second check after initial driving is just as useful on a performance car like the STI. Recheck pressure, look for any rub marks, and pay attention to vibration or pull that could signal a mounting, balance, or alignment issue. Catching those details early helps the tires wear more evenly and behave as intended.

Tires on a 2019 Subaru WRX STI should be inspected regularly, not just when tread looks low. Low-profile performance radials can hide damage less easily than taller sidewall tires, so frequent checks for cuts, bulges, irregular wear, and pressure loss are worthwhile. A quick visual inspection before longer drives is a sensible routine.

Collector-style storage is less of a concern here than active-use condition, but age and infrequent driving still matter. Cars that sit for long periods should have their tires checked for cracking and flat spotting, while cars driven often should be monitored for alignment wear. Either way, consistent inspection helps protect handling and ride quality.