A California builder creates a work of art in 30 days; a small-town man builds a masterpiece.

A legendary designer competes against his son.

California bragging rights are at stake when Santa Cruz's Scott Long takes on Los Angeles' Trevelen Rabanal in a grueling 10-day, bike-building battle.

Mike Metzger and Larry Linkogle face off in the first-ever freestyle motocross build-off where they make bikes that can fly over desert dunes and back flip from ramp to ramp.

Southern California boys Roland Sands and Jesse Rooke face off to build high-speed motorcycles that are fit to race. If they succeed, the bikes will be tested on a 2-mile course, drag course and dirt flat track.

While one's from Germany and the other South Dakota, leading designers Marcus Walz and Michael Prugh go head-to-head in a battle for global domination.