2018 Porsche 718 Boxster

2018 Porsche 718 Boxster wheel fitment at a glance

This 2018 Porsche 718 Boxster is running BBS CI-R, staggered: 20x8.5 +30 up front and 20x11 +16 in the rear, wrapped in 245/35R20 front and 295/30R20 rear tires.

It sits on Ohlins R/T with camber plates front, adjustable toe and camber arms rear coilovers with a flush stance, meaning the wheel face lines up with the fender.

If you are searching for Porsche 718 Boxster wheel fitment, BBS CI-R on a Porsche 718 Boxster, 20x8.5 +30 wheels on a 718 Boxster, or what tire size goes with that setup, this build is a real-world answer, photographed and measured by the owner.

BBS CI-R 20x8.5 +30 specs (staggered)

The wheels are 20-inch in diameter and 8.5 inches wide with a +30 offset up front, and 20-inch by 11 inches at +16 in the rear, in the 5x112 bolt pattern the Porsche 718 Boxster uses.

A +30 offset on a 8.5-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. The rear +16 offset on the 11-inch wheel pushes the rear out further for the staggered look.

BBS CI-R 20x8.5 +30 on a Porsche 718 Boxster is a common 718 Boxster question, and this page shows exactly how it sits, how it clears, and what the owner changed to make it work.

245/35R20 / 295/30R20 tires on 20x8.5 wheels

The tire size is 245/35R20 front and 295/30R20 rear: a 245 mm section width with a 35 aspect ratio on the 20-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 Arroyo Grand Sport AS 245/35ZR20 at $107 each in 245/35R20, and more 245/35R20 tires through the tire search.

Searching for 245/35R20 tires on a Porsche 718 Boxster, or the right tire size for 20x8.5 +30 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 Ohlins R/T with camber plates front, adjustable toe and camber arms rear coilovers, which lets the owner dial in ride height and camber to clear 20x8.5 +30 and get the flush look.

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: flush. The wheel face lines up with the fender. Flush fitment on a Porsche 718 Boxster comes down to the offset and width above; copy them and you get the same result.

Will 20x8.5 +30 fit a Porsche 718 Boxster?

Will BBS CI-R 20x8.5 +30 fit a 2018 Porsche 718 Boxster? This owner's answer is yes, on Ohlins R/T with camber plates front, adjustable toe and camber arms rear coilovers, with no rubbing.

6 other Porsche 718 Boxster builds in the gallery run sizes like 18x9 / 18x10, 19x8.5 / 19x10.5, 19x9 / 19x10.5, 18x9 / 18x10.5, so you can compare offsets, tire sizes and suspension before you order. See all Porsche builds.

Our fitment guarantee covers wheels bought through wheels that fit the 2018 Porsche 718 Boxster: 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 Porsche 718 Boxster

We sell this exact wheel: BBS CI-R 5x112 20x8.5 +32 Platinum Silver Polished Rim Protector is $710 each, about $2,960 for the set of four. Add tires on the product page and it ships as a mounted and balanced Porsche 718 Boxster wheel and tire package with free shipping.

Financing is available on every set, and 2018 Porsche 718 Boxster 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 Porsche 718 Boxster and size before you order, and add your own ride once it is done so the next owner can see what fits.