2020 Subaru WRX STI

2020 Subaru WRX STI wheel fitment at a glance

This 2020 Subaru WRX STI is running Cosmis Wheels Racing XT-206R in 18x9.5 +10 at all four corners, wrapped in 225/40R18 Lexani LX-NINE tires.

It sits on stock suspension with a nearly flush stance, meaning the wheel face sits a touch inside the fender line.

If you are searching for Subaru WRX STI wheel fitment, Cosmis Wheels Racing XT-206R on a Subaru WRX STI, 18x9.5 +10 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.

Cosmis Wheels Racing XT-206R 18x9.5 +10 specs

The wheels are 18-inch in diameter and 9.5 inches wide with a +10 offset.

A +10 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.

Cosmis Wheels Racing XT-206R 18x9.5 +10 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.

225/40R18 tires on 18x9.5 wheels

The tire size is 225/40R18: a 225 mm section width with a 40 aspect ratio on the 18-inch wheel, which gives a stretched fit (the tire is narrower than the wheel, which pulls the sidewall in and helps clear the fender).

The owner chose Lexani LX-NINE. We stock Ironman IRON iMOVE Gen 3 AS 225/40ZR18XL at $89 each in this size, and other 225/40R18 tires through the 225/40R18 tire search.

Searching for 225/40R18 tires on a Subaru WRX STI, or the right tire size for 18x9.5 +10 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

This Subaru WRX STI is on stock suspension, so the ride height is factory and the fitment you see here works without lowering the car.

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: nearly flush. The wheel face sits a touch inside the fender line. 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 +10 fit a Subaru WRX STI?

Will Cosmis Wheels Racing XT-206R 18x9.5 +10 fit a 2020 Subaru WRX STI? This owner's answer is yes, with no rubbing.

6 other Subaru WRX STI builds in the gallery run sizes like 18x10.5, 19x9.5, 18x9.5, 18x10, 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 2020 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

Cosmis Wheels Racing XT-206R is not something we carry today. For the same look on your WRX STI, browse wheels that fit the 2020 Subaru WRX STI in 18-inch sizes near +10 offset; the Subaru WRX STI wheel and tire packages there ship mounted and balanced.

Financing is available on every set, and 2020 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.