<Tr> <Th> Most wins </Th> <Td> Joey Dunlop 26 (1977--2000) </Td> </Tr> <Tr> <Th> Lap record </Th> <Td> Michael Dunlop 16 minutes 53.929 seconds--133.962 mph (215.591 km / h) (2016) </Td> </Tr> <P> The International Isle of Man TT (Tourist Trophy) Race is an annual motorcycle sport event run on the Isle of Man in May or June of most years since its inaugural race in 1907 . </P> <P> The Isle of Man TT has been traditionally run in a time - trial format on public roads closed for racing by the provisions of an Act of Tynwald (the parliament of the Isle of Man). The event consists of one week of practice sessions followed by one week of racing . It has been a tradition perhaps started by racing competitors in the early 1920s for spectators to tour the Snaefell Mountain Course on motorcycles during the Isle of Man TT on "Mad Sunday", an informal and unofficial sanctioned event held on the Sunday between' Practice Week' and' Race Week .' </P>

When do the isle of man tt races start