2018 Kia Optima

2018 Kia Optima wheel fitment at a glance

This 2018 Kia Optima is running Ace Alloy Cinco in 18x8 +40 at all four corners, wrapped in 225/45R18 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 Kia Optima wheel fitment, Ace Alloy Cinco on a Kia Optima, 18x8 +40 wheels on a Optima, or what tire size goes with that setup, this build is a real-world answer, photographed and measured by the owner.

Ace Alloy Cinco 18x8 +40 specs

The wheels are 18-inch in diameter and 8 inches wide with a +40 offset.

A +40 offset on a 8-inch wide wheel puts the wheel face in a mild push toward the fender. Lower offset moves the wheel outward; higher offset tucks it in.

Ace Alloy Cinco 18x8 +40 on a Kia Optima is a common Optima question, and this page shows exactly how it sits, how it clears, and what the owner changed to make it work.

225/45R18 tires on 18x8 wheels

The tire size is 225/45R18: a 225 mm section width with a 45 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).

We stock Ironman IRON iMOVE Gen 3 AS 225/45ZR18 at $99 each in 225/45R18, and more 225/45R18 tires through the tire search.

Searching for 225/45R18 tires on a Kia Optima, or the right tire size for 18x8 +40 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 Kia Optima 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, no fender work. That means the setup fits as-is, which is what most owners want to know before they buy.

Stance: nearly flush. The wheel face sits a touch inside the fender line. Flush fitment on a Kia Optima comes down to the offset and width above; copy them and you get the same result.

Will 18x8 +40 fit a Kia Optima?

Will Ace Alloy Cinco 18x8 +40 fit a 2018 Kia Optima? This owner's answer is yes, with no rubbing.

6 other Kia Optima builds in the gallery run sizes like 19x8, 20x8, 19x8.5 / 19x9.5, 17x7.5, 18x8.5, so you can compare offsets, tire sizes and suspension before you order. See all Kia builds.

Our fitment guarantee covers wheels bought through wheels that fit the 2018 Kia Optima: 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 Kia Optima

Ace Alloy Cinco is not something we carry today. For the same look on your Optima, browse wheels that fit the 2018 Kia Optima in 18-inch sizes near +40 offset; the Kia Optima wheel and tire packages there ship mounted and balanced.

Financing is available on every set, and 2018 Kia Optima 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 Kia Optima and size before you order, and add your own ride once it is done so the next owner can see what fits.