<Tr> <Td_colspan="2"> Flash Pass Available </Td> </Tr> <Tr> <Td_colspan="2"> Kingda Ka at RCDB Pictures of Kingda Ka at RCDB </Td> </Tr> <P> Kingda Ka is a steel accelerator roller coaster located at Six Flags Great Adventure in Jackson, New Jersey, United States . It is the world's tallest roller coaster, the world's second fastest roller coaster, and was the second strata coaster ever built . It was built by Stakotra, a subcontractor to Intamin . Riders have to be 54" in order to be able to get on the roller coaster . </P> <P> The train is launched by a hydraulic launch mechanism to 128 miles per hour (206 km / h) in 3.5 seconds . At the end of the launch track, the train climbs the main top hat tower, reaching a height of 456 feet (139 m) and spanning over a 3,118 - foot - long (950 m) track by the end of the ride . </P>

How tall do u have to be to ride kingda ka