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American Flat Track is an American motorcycle racing series. [1] The racing series, founded and sanctioned by the American Motorcyclist Association (AMA) in 1954, originally encompassed five distinct forms of competitions including mile dirt track races, half-mile, short-track, TT steeplechase and road races .
Bryan Smith at the Sturgis TT 2017. Smith has been racing for over fourteen years. In 2015, Smith competed in his first X Games, winning gold in the Flat-Track event. [1] [2] [3] Smith has won five races at the Illinois State Fairgrounds Racetrack, the latest being the AMA Pro Flat Track Grand National Championship.
If a shirt is made from a natural absorbent fabric like cotton, the moisture gets absorbed into the fibers and the shirt or garment may feel wet and heavy. Moisture-wicking fabrics such as polyester are designed to keep the sweat on the outer surface, acting like channels to transport the sweat to the outer layer of the shirt or garment.
Nearly all tracks are oval and less than 1-mile (1.6 km) in length with most being 1 ⁄ 2 mile (800 m) or less. The most common increments in the U.S. are 1 ⁄ 2 mile (800 m), 3 ⁄ 8 mile (600 m), 1 ⁄ 3 mile (540 m), 1 ⁄ 4 mile (400 m), and 1 ⁄ 8 mile (200 m). With the longer tracks, the race cars achieve higher speeds up to 160 mph ...
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(track) 1985 – 1993: 5000 metres race walk (track) 1985 – 1993: 10,000 metres race walk (track) 1912 – 1924, 1948 – 1952. 1992 – 1996: 1987 – 1997: 10 kilometres (road) 1983 – 1984: World Women's Road Race Championships: 15 kilometres (road) 1985 – 1991: World Women's Road Race Championships: 20 kilometres (road) 2006: 2006
Some facilities feature several ovals track of different sizes, often sharing part of the same front straightaway. The now defunct Ascot Speedway featured 1/2 mile and 1/4 mile dirt oval tracks, and Irwindale Speedway features 1/2 mile and 1/3 mile concentric paved oval tracks. Pocono Raceway once had a 3/4 mile oval which connected to the main ...
This had suited Harley Davidson well with their side-valve 750cc K-series V-twins. The AMA raised the limit for ohv engines to 750 cc for 1969 in the flat track class. BSA/Triumph supplied a few triple based flat trackers to selected riders to use on mile circuits, but the triples were too wide and heavy and the riders soon reverted to using twins.