21-Gyronautx1.com Published 1 April 2020 at 949 × 310 in The Greatness of Alex Tremulis, Part 3: Streamlining and Speed ← Previous / Next → Gyronaut X-1 held the motorcycle Land Speed Record from 1965 to 1970. L-R: AMA President Earl Flanders, driver Bob Leppan, Alex Tremulis and mechanic Jim Brudflodt. (For more on this remarkable concept, visit Gyronautx1.com) Share this article: