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Optima Sports pushes two new tire innovations

WITH VIDEO -- If John Scott has his way, every car on the road will be shod with tires featuring built-in camber. Scott is the owner of Wisconsin-based Optima Sports, a small automotive-engineering firm, and inventor of Camber Tires--tires with a constantly decreasing diameter. According to Scott, his tires offer multiple benefits, including enhanced handling, increased stability, reduced tread noise, improved fuel economy and better safety by reducing rollovers.

Dinner with Bob Lutz: Looking back at nearly 50 years in the car business

Bob Lutz is retiring--again. He has tried this twice before: at Chrysler in 1998 and with his abortive exit from General Motors last year. But this time, at age 78, it may stick, even for the car guy who has operated at the industry's highest levels since the early 1970s.

Go racing on the iPad with PadRacer

The Apple iPad is looking more and more like a gaming device--in addition to the world-changing tablet we were promised. But no complaints here, the PadRacer game for the device looks like a perfect time-waster for people who are supposed to look busy. PadRacer (www.itunes.com, $5) is a top-view racing game for four players similar to the old Ivan “Ironman” Stewart’s Super Off-Road arcade game.