If you’re looking for fitment advice for your 2008 - 2014 Subaru GR WRX STI, you’ve come to the right place. Our GR WRX STI Fitment Guide contains tailored information for a wide range of wheel and tire setups specific to the WRX STI. Featuring popular fitments such as our 18x9.5” ET40, we’re certain that our GR WRX STI fitment guide has a solution for you. As enthusiasts ourselves, we’re mindful of the unique needs that each chassis presents when attempting to optimize wheel fitment and this vehicle is no exception. All of our Subaru WRX STI wheels are designed to clear the factory Brembo brakes as well as a variety of aftermarket big brake kits. Our Subaru GR WRX STI Fitment Guide goes into great detail on exactly what modifications are needed to achieve the exact fitment you’re looking for. We have a wide variety of strong, lightweight wheel designs to choose from. Interested in Forged Wheels? Our VS-5RS and SM-10RS are popular with street and track drivers alike! Our Flow Formed EC-7 is also a fan favorite. If you’re for fitment notes for a GR WRX, check out our Subaru GR WRX Wheel & Tire Fitment Guide!
Brake Clearance Information
In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter.
*All of our STI wheels clear the factory 4-pot Brembo brakes, as well as a variety of aftermarket BBKs.
Bolt Pattern
5x114.3mm
Center Bore
56.1mm
Lug Seat
60º Conical
Thread Pitch
M12x1.25mm
Wider fitments for enhanced performance
Whether you enjoy spirited street driving or you are a weekend track warrior chasing lap times, these wheel & tire configurations are ideal for Subaru GR WRX STI owners looking for a more dramatic improvement in performance and they are typically paired with performance oriented Summer tires or track oriented R-compounds.
Wheels
Tires
Wheels
Tires
Track focused fitments that require significant modifications
These wheel and tire configurations are best suited for hardcore track junkies and club racers competing for a spot on the podium. Everything from Extreme Summer tires to full Racing Slicks are commonly used depending on your experience behind the wheel, class rules, etc.
While the 9.5" wheels aren't very difficult to fit under the front fenders some tire sizes and compounds will require negative camber and fender rolling to prevent rubbing the fenders under suspension compression.
Wheels
Tires
Wheels
Tires
In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter. The following brakes have been tested and confirmed to clear our wheels.
Should I Dial in Negative Camber and How Much is Right for me?
Whether you are a casual weekend track warrior that still enjoys your car on the street, or a hardcore racer competing for a spot on the podium, negative camber is a vital part of chassis setup that has many benefits. Not only will adding negative camber create more room for wider wheel and tire configurations (when dialed in through the top hat / camber plate), it more importantly improves handling, turn-in and tire longevity. Learn more in our blog article The Positives of Negative Camber.