Complex sentence: Lowrider bicycles had a resurgence of popularity the 90; s, as lowrider bicycle competition at lowrider shows started to become intense, as a result of the increased popularity, classic Schwinns became far more scarce as well as more expensive.
Split into simpler sentences: Lowrider bicycles had a resurgence of popularity the 90s, as lowrider bicycle competition at lowrider started to become intense. As a result of the increaded popularity, classic Schwinns became far more scarce as well as more expensive.