The record for the top speed reached on a mountain bike has been broken by cyclist François Gissy on a track near Mulhouse in eastern France. The mountain bike is powered by hydrogen peroxide and reaches speeds of 163mph. Although Gissy beat the previous mountain bike record, he narrowly missed the overall cycling speed record of 167mph set by 50-year-old Dutch cyclist Fred Rompelberg in 1995. Rompelberg achieved this speed by riding in the slipstream of a dragster