John Travolta, Tim Allen, Martin Lawrence, and William H. Macy are middle-aged motorcycle buffs from the Cincinnati suburbs who soothe their midlife crises with a cross-country expedition to the Pacific coast. In New Mexico, Travolta (goofing like he hasn't since Vinnie Barbarino) inadvertently torches a biker gang's roadhouse, and the heroes take refuge in a neighboring town while the bikers, led by a sublimely typecast Ray Liotta, hunt them down. Slack direction from Walt Becker (National Lampoon's Van Wilder) sullies this formula comedy, but the cast is agreeable, particularly Marisa Tomei as the diner owner who falls for the constipated Macy. With a sterling score of dirt-head classic rock and Peter Fonda turning in his second Easy Rider parody this year (the first was in Ghost Rider). PG-13, 105 min.