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Free Shipping on All Wheel & Tire Packages
Questions? Call or text our team 813-535-5801
Kosei K1 17x8.5 +40 245/40R17 Bilstein Sport struts/shocks with H&R Sport springs, standard configuration lowering springs Nearly flush stance
2018 BMW 430i xDrive Gran Coupe
This 2018 BMW 430i xDrive Gran Coupe is running Kosei K1 in 17x8.5 +40 at all four corners, wrapped in 245/40R17 tires.
It sits on Bilstein Sport struts/shocks with H&R Sport springs, standard configuration lowering springs with a nearly flush stance, meaning the wheel face sits a touch inside the fender line.
If you are searching for BMW 430i xDrive Gran Coupe wheel fitment, Kosei K1 on a BMW 430i xDrive Gran Coupe, 17x8.5 +40 wheels on a 430i xDrive Gran Coupe, or what tire size goes with that setup, this build is a real-world answer, photographed and measured by the owner.
The wheels are 17-inch in diameter and 8.5 inches wide with a +40 offset.
A +40 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.
Kosei K1 17x8.5 +40 on a BMW 430i xDrive Gran Coupe is a common 430i xDrive Gran Coupe question, and this page shows exactly how it sits, how it clears, and what the owner changed to make it work.
The tire size is 245/40R17: a 245 mm section width with a 40 aspect ratio on the 17-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 245/40ZR17XL at $101 each in 245/40R17, and more 245/40R17 tires through the tire search.
Searching for 245/40R17 tires on a BMW 430i xDrive Gran Coupe, or the right tire size for 17x8.5 +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.
The drop comes from Bilstein Sport struts/shocks with H&R Sport springs, standard configuration lowering springs, the simplest way to close the fender gap on a BMW 430i xDrive Gran Coupe while keeping the factory shocks.
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 BMW 430i xDrive Gran Coupe comes down to the offset and width above; copy them and you get the same result.
Will Kosei K1 17x8.5 +40 fit a 2018 BMW 430i xDrive Gran Coupe? This owner's answer is yes, on Bilstein Sport struts/shocks with H&R Sport springs, standard configuration lowering springs, with no rubbing.
2 other BMW 430i xDrive Gran Coupe builds in the gallery run sizes like 20x9 / 20x10.5, 17x8.5, so you can compare offsets, tire sizes and suspension before you order. See all BMW builds.
Our fitment guarantee covers wheels bought through wheels that fit the 2018 BMW 430i xDrive Gran Coupe: pick the car, and every size shown is one we have checked for bolt pattern, hub bore and clearance.
Kosei K1 is not something we carry today. For the same look on your 430i xDrive Gran Coupe, browse wheels that fit the 2018 BMW 430i xDrive Gran Coupe in 17-inch sizes near +40 offset; the BMW 430i xDrive Gran Coupe wheel and tire packages there ship mounted and balanced.
Financing is available on every set, and 2018 BMW 430i xDrive Gran Coupe wheels ship free when bought as a wheel and tire package.
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 BMW 430i xDrive Gran Coupe and size before you order, and add your own ride once it is done so the next owner can see what fits.
