2018 Subaru WRX STI

2018 Subaru WRX STI wheel fitment at a glance

This 2018 Subaru WRX STI is running Advan Racing TC-4 in 18x9.5 +12 at all four corners, wrapped in 285/30R18 Federal SS 595 tires.

It sits on coilovers with a flush stance, meaning the wheel face lines up with the fender.

If you are searching for Subaru WRX STI wheel fitment, Advan Racing TC-4 on a Subaru WRX STI, 18x9.5 +12 wheels on a WRX STI, or what tire size goes with that setup, this build is a real-world answer, photographed and measured by the owner.

Advan Racing TC-4 18x9.5 +12 specs

The wheels are 18-inch in diameter and 9.5 inches wide with a +12 offset, in the 5x114.3 bolt pattern the Subaru WRX STI uses.

A +12 offset on a 9.5-inch wide wheel puts the wheel face in a very aggressive position at or past the fender. Lower offset moves the wheel outward; higher offset tucks it in.

Advan Racing TC-4 18x9.5 +12 on a Subaru WRX STI is a common WRX STI question, and this page shows exactly how it sits, how it clears, and what the owner changed to make it work.

285/30R18 tires on 18x9.5 wheels

The tire size is 285/30R18: a 285 mm section width with a 30 aspect ratio on the 18-inch wheel, which gives a meaty fit (the tire is wider than the wheel, so the sidewall bulges a little and gives more cushion).

The owner chose Federal SS 595. We stock Continental CON ExtremeContact Sport 02 285/30R18 at $343 each in this size, and other 285/30R18 tires through the 285/30R18 tire search.

Searching for 285/30R18 tires on a Subaru WRX STI, or the right tire size for 18x9.5 +12 wheels? This is one owner's proven combination, and every wheel and tire package we sell ships mounted, balanced and ready to bolt on.

Suspension, stance and clearance

The car is lowered on coilovers, which lets the owner dial in ride height and camber to clear 18x9.5 +12 and get the flush look.

No rubbing at all, front or rear, no spacers, rolled fenders. Rolling or pulling the fender is what most owners do once the wheel sits this close; it keeps the tire from catching the lip over bumps.

Stance: flush. The wheel face lines up with the fender. Flush fitment on a Subaru WRX STI comes down to the offset and width above; copy them and you get the same result.

Will 18x9.5 +12 fit a Subaru WRX STI?

Will Advan Racing TC-4 18x9.5 +12 fit a 2018 Subaru WRX STI? This owner's answer is yes, on coilovers, with no rubbing.

6 other Subaru WRX STI builds in the gallery run sizes like 18x10.5, 19x9.5, 18x9.5, so you can compare offsets, tire sizes and suspension before you order. See all Subaru builds.

Our fitment guarantee covers wheels bought through wheels that fit the 2018 Subaru WRX STI: pick the car, and every size shown is one we have checked for bolt pattern, hub bore and clearance.

Buy the same wheels and tires for your Subaru WRX STI

We sell this exact wheel: Advan Racing TC4 5x114.3 18x9.5 +12 BLACK GUNMETALLIC & RING is $640 each, about $2,560 for the set of four, in stock and ready to ship. Add tires on the product page and it ships as a mounted and balanced Subaru WRX STI wheel and tire package with free shipping.

Financing is available on every set, and 2018 Subaru WRX STI wheels ship free when bought as a wheel and tire package.

About this build

Every car in the Threepieceus gallery was submitted by its owner or collected from real builds, with the wheel size, offset, tire size, suspension and clearance recorded as fitted. Check two or three builds with the same Subaru WRX STI and size before you order, and add your own ride once it is done so the next owner can see what fits.