Big wheels and low profile tires make any vehicle look tough. For years, the aftermarket has provided wheels in the most gargantuan sizes possible, wrapping them in tires with sidewalls as thin as an o-ring. As beltlines rise, greenhouses shrink, and wheel arches become more pronounced, manufacturers are routinely shoeing their cars — even relatively sedate family sedans — with wheels 19 and even 20 inches in diameter. They look great, but their durability and expense is questionable, at best. Not long ago — well into the 2000s — most daily driver sedans came with something along the lines of a 205/60R15 tire (See this diagram to explain the numbers). Tires in these sizes typically offer a good compromise between road-holding and ride, providing a nice, fat contact patch with the road, yet allowing some flexibility in the sidewall to soak up pavement irregularities.
@ Bob Stuart: The built-in air cylinders avoid the bouncing. The very first design in 2010 was actually with springs and, indeed too bouncy. The cylinders have a non linear suspension (exponential) that have a great dampening effect.

Today, the Ford Taurus SEL — the top-of-the-line before you get into the high-performance SHO — comes standard with 18 inch wheels. Many buyers select the optional 19-inch wheels, though, which come with Goodyear Eagle RSA 255/45R19 tires. The alpha-numeric soup on the sidewall might not instantly make sense, but compared to what was previously available on the Taurus, that wheel and tire combination is massive.
Repairs aren't the only pricey setback, When it comes time to replace a high-performance, low-profile tire, the cost can be staggering. Take, for example, the 2011 Chrysler 300C AWD. By the time 35,000 miles pass, according to TireRack.com, you'll be looking at an $1,128 bill if you opt for the factory Michelin Pilot HX MXM4 tires in 235/55R19 size, not including mount, balance, tire disposal, or the four-wheel alignment that's always a good idea before investing in new rubber.