The UCI has ratified Matthé Pronk and Joop Zijlaard's Derny Hour Record of 66.114 km, which was set on November 18, 2004, in Alkmaar, The Netherlands. In doing so, Pronk broke the 34 year-old record that was held by Belgian Theo Verschueren and Noppie Koch, who did 64.546 km in an hour in 1970. It's hoped that the new mark will encourage others to have a go at it in future.
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