Question:  Miami Springs was founded by an American aviation pioneer who began his career as a bicycle racer and builder before moving on to what?
Context: Ruthie Matthes (born November 11, 1965) is an American professional bicycle racer who won the World Cross-Country Mountain Bike Championship in 1991.  She is also a road cyclist, having twice finished in 2nd place in the Women's Challenge bicycle stage race.  Ruthie is one of a series of professional riders who got their start in cycling through the Red Zinger Mini Classics youth bicycle race series in Colorado. Iban Mayoz Exteberria (born September 30, 1981 in San Sebastián, Basque Country) is a Spanish professional road bicycle racer, currently not under contract to any team.  He began his career at Relax in 2004 before moving to ProTour team Euskaltel-Euskadi in 2006, and then to Karpin-Galicia in 2008. James Howard "Dutch" Kindelberger (May 8, 1895 in Wheeling, West Virginia – July 27, 1962) was an American aviation pioneer.  He led North American Aviation in 1934-1960.  The International Aerospace Hall of Fame inducted Kindelberger in 1977. George M. Hendee (October 2, 1866 – 1943) was a bicycle racer and co-founder of the world’s largest motorcycle company, Indian Motocycle Manufacturing Company.  Hendee first became involved with the bicycle industry after his bicycle-racing career.  Not only did Hendee build bicycles, but he also sponsored numerous bicycle events and racers.  Once he retired from racing and the manufacturing company, Hendee bred cattle and chickens on his farm. Thomas Löfkvist (born 4 April 1984) is a Swedish former professional road bicycle racer who last rode for the UCI Professional Continental team IAM Cycling .  Since 2015 Thomas Löfkvist is general manager of Swedish professional cycling team Team Tre Berg–PostNord.  He became the youngest Swedish professional road bicycle racer when he started his professional bicycling career in FDJeux.com at the age of 19 in 2004.  Lövkvist is a good time trialist and has recently improved his climbing abilities, winning the Monte Paschi Eroica in 2009 with a powerful attack during the steep final kilometer ascent.  He has previously used, both within and outside of the cyling world, the surname spelling 'Lövkvist'.  Beginning with the cycling season of 2010 he is using his legal surname "Löfkvist" throughout. Glenn Hammond Curtiss (May 21, 1878 – July 23, 1930) was an American aviation pioneer and a founder of the U.S. aircraft industry.  He began his career as a bicycle racer and builder before moving on to motorcycles.  As early as 1904, he began to manufacture engines for airships.  In 1908 Curtiss joined the Aerial Experiment Association (AEA), a pioneering research group, founded by Alexander Graham Bell at Beinn Bhreagh, Nova Scotia to build flying machines. Leonard Maffei was a champion bicycle racer in the United States during the 1930s.  Born Leonardo E. Marzigliano in Providence, Rhode Island, he raced under his mother's maiden name because his own name was too long to fit on a jersey.  Based in Brooklyn, New York, Maffei raced throughout the Northeast during the heyday of American bicycle racing in venues like Madison Square Garden and the Coney Island Velodrome.  He won the New York state championship three times, in 1933's Junior division and the Senior title in 1936 and 1937.  Leonard's accomplishments also include riding an antique bicycle (used by Charles M. "Mile a Minute" Murphy in 1899 to ride a measured mile in under 60 seconds) on national television. Miami Springs is a city located in Miami-Dade County, Florida, Florida.  The city was founded by Glenn Hammond Curtiss, "The Father of Naval Aviation", and James Bright, during the famous "land boom" of the 1920s and was originally named Country Club Estates.  It, along with other cities in Miami-Dade County such as Coral Gables, Florida and Opa-locka, Florida, formed some of the first planned communities in the state.  Like its counterparts, the city had an intended theme which in its case, was to reflect a particular architecture and ambiance. Adriano Baffi (born 7 August 1962) is a former Italian bicycle road racer.  After his career as a rider, he became a team director.  He is the son of Italian bicycle racer Pierino Baffi. Eddie Miles (born September 13, 1968) is a former American football linebacker who played one season with the Pittsburgh Steelers of the National Football League.  He was drafted by the Pittsburgh Steelers in the tenth round of the 1990 NFL Draft.  He played college football at the University of Minnesota and attended Miami Springs High School in Miami Springs, Florida.
Answer: motorcycles