IRKED BY THOSE FREAKISH half-hamstring tan lines from your spandex shorts? Here’s a thought: Don’t wear ’em! Head to the Vermont Avenue side of McPherson Square this Saturday at 4 p.m. to participate in the third annual World Naked Bike Ride ( The event is part of a worldwide, grassroots movement ( that aims to draw attention to oil dependency. It’s no coincidence that the mile -long loop pedals by the Capitol and the White House.

D.C. event organizer Roger (who asked that his last name be withheld) anticipates 100 riders this year, ages 20 to 60. Despite the ride’s moniker, Roger doesn’t advise going with the full monty. “I’m not in the stage of my life where I really want to chance going to jail,” says the 52-year-old, acknowledging buff biking may get one arrested for public exposure. His choice? “I wore a tiny sack,” he says. He says as long as a person’s privates are kept private, one isn’t considered naked. (But even with a sock or thong covering one’s itty bits, the momentum from pedaling might reveal your illegal yoo-hoo.) Of the 20 riders who attended last year, half wore shorts and shirts, while others opted for Speedos and thongs. Isn’t that a bum bruiser? “Unless you have a really tender bottom,” Roger says, “it won’t be a problem.”

Too modest for that? Try the Arlington and Alexandria Community Bike Ride (8 a.m., in Crystal City. And you needn’t bare your booty.

Photo by Saul Loeb/AFP/Getty Images