The fastest human to ride a bicycle over open ground is named Denise Mueller-Korenek, who rode a custom bike at an average of 183.932 miles per hour – shattering a world record that had stood since 1995. Mueller-Korenek, 45, set the new record for fastest speed riding in a slipstream, teaming up with Shea Holbrook, a professional race car driver who piloted a dragster that led the cyclist across the Bonneville Salt Flats in Utah.