Watch the Women's and Men's Races for the 4th round of the 2017 UCI BMX Supercross World Cup in Heusden-Zolder (BEL) More at http://www.uci.ch/bmx/ucievents/2017-bmx-uci-bmx-supercross-world-cup/457808117/ Follow us on Twitter at @UCI_BMX_SX and #UCIBMXWC