Tyrone Stevenson Jr. "Scraperbike King"

Tyrone Stevenson Jr. "Scraperbike King"Preston Badger, 18, left, Tyrone Stevenson Jr., 19, Fred Rogers, 18, Eduardo Ochoa, 17, and Luis Medrano, 19, ride their scraperbikes on Santa Rita Street in Oakland.The teenagers will take part in Bike for Life, Riding for Peace event around Lake Merritt in Oakland on Sunday, July 13. (Ray Chavez/The Oakland Tribune)