It's a common problem with a lot of cars these days. Most automakers have succumbed to the fad that bigger wheels (and hence lower-profile tires) are necessary. Not long ago, 15" was the norm on most economy cars (14" on some) with 16" as the premium upgrade. Now 16" is often the base wheel, with 17" or 18" as the upgrade. It's ridiculous. Car and Driver even called the base 16" wheels on the new Mazda CX-3 laughably small--it shows you how the narrow-minded views of automotive "experts" are encouraging automakers to do things that are bad for most consumers. I'd much rather the iM came with 16" wheels standard, with 17" or 18" available as a dealer upgrade. Oh, well!