About This Subaru WRX STI Type RA 2018 Build
We love featuring real builds from real owners. This Subaru WRX STI Type RA 2018 sits on a set of 18×9.5 / 18×9.5-inch Cosmis Racing S1 wheels, and the result speaks for itself.
The owner chose Cosmis Racing for a reason. This brand delivers serious quality and a design language that turns heads at every car meet. We see hundreds of Subaru WRX STI Type RA builds come through WheelFront every month, but this one stands out. The combination of the exterior with the Cosmis Racing S1 creates a look that balances aggression with elegance.
Fitment Breakdown: Cosmis Racing S1 on the Subaru WRX STI Type RA 2018
I walked around this Type RA for twenty minutes and the stance blew me away. Running an 18x9.5 setup all around gives this Subaru a serious, track-ready footprint. That +15 offset pushes the wheels way out toward the fender edges.
The Cosmis S1 design clears those massive Brembo calipers with plenty of room to spare. We love how that deep-dish barrel makes the car look wider than it actually is. It really fills out the wheel wells perfectly.
The hub bore fits the STI hub perfectly without any need for annoying rings. You get a solid, vibration-free connection that matters when you are pushing through corners. The bolt pattern matches the factory studs exactly.
Because the offset sits at +15, these wheels poke quite a bit past the factory fender lines. You will definitely feel that aggressive change in scrub radius when you steer. It gives the car a heavy, planted feel on the tarmac.
Running this setup on stock suspension is a bold move that works surprisingly well. You get that classic rally-inspired aesthetic without needing a full coilover conversion. The wheels sit flush with the imaginary vertical line of the fender arch.
Watch out for rubbing if you plan to carry passengers or hit big bumps at speed. The rear tires might touch the plastic liner if the car compresses hard. You might need to roll those rear fenders just a hair to stay safe.
The spoke design on the S1 is classic and rugged. It complements the angular lines of the 2018 chassis perfectly. We think this is one of the best ways to upgrade the exterior without ruining the STI DNA.
What We Recommend for Subaru WRX STI Type RA 2018 Owners
If you want this look, stick to the 18x9.5 square setup. Going wider usually leads to endless rubbing issues that ruin your daily drive. This width lets you run a meaty tire without making the car feel sluggish.
Offset is the magic number for these Subarus. Anything above +30 will look tucked and boring on this body style. Sticking around +15 to +22 creates that wide, aggressive look we all crave.
We always suggest a square setup for an STI. It lets you rotate your tires properly and keeps the drivetrain happy on the road. Staggered setups on an AWD platform like this are just asking for center differential trouble.
Do not skip on quality rubber when you upgrade to wheels this wide. A 255 or 265 width tire provides the best balance of grip and clearance. Avoid massive stretch unless you want to sacrifice every bit of performance.
If you choose to lower the car later, you will need adjustable rear control arms. You need that extra camber to tuck the tires under the fenders if you drop the ride height. Always measure twice before you drop the cash on new wheels.
Style and Build Analysis
The bronze finish on these Cosmis wheels looks incredible against the factory paint. It adds a sophisticated, motorsports-inspired contrast that pops in the sunlight. Bronze is the gold standard for Subaru builds for a reason.
The S1 wheel design features a stepped lip that screams 90s nostalgia. It looks right at home on the VA chassis, blending old-school cool with modern performance. You cannot help but stare at the concave spokes as they rotate.
This car holds a presence that stock STIs just cannot match. The wide stance makes the factory wing look even more purposeful and aggressive. It transforms the car from a commuter into a street weapon.
We have seen a lot of wheels on the Type RA, but this combo hits different. Most guys pick black wheels that hide all the detail, but the bronze makes a statement. It proves you have an eye for classic styling.
The proportions feel spot on from every single angle. The wheels don't look too small, and they certainly don't look like oversized rubber bands. This is exactly how the car should have left the factory floor.
Why We Love This Build
Seeing this Type RA in the wild stopped us dead in our tracks. The way the bronze finish catches the light against the paint is pure automotive art. Those Cosmis S1s fill the arches with a raw, mechanical intensity that looks ready for a rally stage. It is the perfect blend of Japanese aggressive styling and raw, functional performance.
Every time the owner rolls by, the wheels create this incredible visual weight that defines the whole build. We love how he didn't overcomplicate it with unnecessary aero or wild parts. He kept it clean, simple, and undeniably mean. It makes us want to run out, buy a set of bronze wheels, and hit the backroads immediately.
This is exactly how a Subaru should look. Build it right and drive it hard.
Full Specs Breakdown
Here is exactly what this owner is running. We break down every detail so you can replicate this build or use it as a starting point for your own setup.
- Car Make & Model: Subaru WRX STI Type RA 2018
- Vehicle Color:
- Wheel Brand & Model: Cosmis Racing S1
- Wheel Size: 18×9.5 / 18×9.5
- Offset: 15 / 15
- Wheel Finish: Bronze
- Tires: Yokohama ADVAN Sport AS 255/40 26″x10″ / 255/40 26″x10″
- Suspension: Stock
Before You Buy: Fitment Checklist
We talk to Subaru WRX STI Type RA owners every day. These are the questions we hear most before they pull the trigger on new wheels.
Will 18×9.5 / 18×9.5-inch wheels fit my Subaru WRX STI Type RA? Yes, but fitment depends on width, offset, and tire size working together. A wrong offset means rubbing. A wrong tire size means poor handling. Always verify all three.
Do I need to modify my fenders? That depends on your offset and suspension. A conservative offset with stock ride height usually fits without modification. Go aggressive and you may need to roll or pull your fenders.
Can I daily-drive this setup? Absolutely. Thousands of Subaru WRX STI Type RA owners run 18×9.5 / 18×9.5-inch wheels every day. The key is choosing the right tire with enough sidewall to absorb road imperfections.
