Toe Jam

SELLING SOLES The athletic-shoe biz is worth more than $10 billion a year, so there's no shortage of people trying to create the next Rollerblade, Air Jordan or even a whole new sport. Here are some contenders and their chance (ranked by Michael Jordan heads) of catching on.

CROSSKATES Gimmick: Meld in-line skates, skis and dirt bikes New fad? [rated 2 Michael Jordan heads] Look freaky and dangerous, which helps

STRENGTH SHOES Gimmick: Build calf muscle by redistributing weight New fad? [rated 1/2 Michael Jordan head] Had some fans for 13 years, but haven't caught on big


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