the T-tailed design of the aircraft. 13 in cycling, which is commonly worn upside-down due to triskaidekaphobia. 51 in the Tour de France, due to a false belief that it has been worn by more winners than any other number. 261 in the Boston Marathon, due to it being worn by Kathrine Switzer in the 1967 edition of the event, when she became the first woman to run the race as a numbered entrant. Switzer later created a non-profit organization named 261 Fearless. At the 2019 Boston Marathon, organizers gave special bib numbers to several celebrities. Former NFL player Tedy Bruschi was given 5454, his uniform number repeated; NASCAR driver Jimmie Johnson was given 4848, his car number with Hendrick Motorsports repeated; and Joan Benoit Samuelson was given 1979, the year of her first win in the event. See also Number (sports) Name (sports) References Further reading External links Thousands Of Runners Grab Bib Numbers, Gear At Boston Marathon Expo from CBS Boston via YouTube Triathlon Race Day Tips | Race Belt and Race Number via YouTube