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"These days, the only thing growing more quickly than the nation&amp;#039;s waistline is the wheel-and-tire diameter of the average road car. Though a larger overall diameter pays dividends in ride quality\u2014pull your mind from the gutter, we&amp;#039;re referring to the wheels\u2014and fuel economy, it typically adds weight. Which, conversely, degrades ride and economy. Australia-based Carbon Revolution has taken a step toward addressing that problem with its CR9, the world&amp;#039;s first all-carbon-fiber production wheel. The gorgeous CR9 has been engineered to replicate the stiffness of the factory wheels on the 997-chassis Porsche 911 GT3. They weigh nearly 40 percent less than the Porsche&amp;#039;s alloys, reducing the car&amp;#039;s unsprung mass by 41 pounds. The rub: A set costs $15,000. On track, the CR9s transform a GT3. The Porsche&amp;#039;s steering is suddenly all Lotusy, requiring far less effort and transmitting more nuanced information. With modern carmakers increasingly focused on slashing curb weights, wheels like these hold promise. And if OEMs adopt carbon wheels, costs will drop, making them attainable for the average Joe. "^^<http://www.w3.org/2001/XMLSchema#string>
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