According to Official Guinness Records,
Markus Riese (Germany) cycled 50 km (31 miles) backwards in a time of 1 hr 46 min 59 sec on the track of VC Darmstadt 1899 e.V. cycling club, Darmstadt, Germany, on 24 May 2003.
Standing start;standard 400 m track.
For a complete list of 2003 records, please visit 2003 Guinness Records in Germany.