Klaas Sys

Klaas Sys (born 30 November 1986) is a Belgian former professional cyclist.

Major results

 * 2007
 * 2nd Overall Volta a Lleida
 * 1st Stage 5a (TTT)


 * 2009
 * 1st Stage 3 Circuit des Ardennes
 * 3rd Romsée–Stavelot–Romsée


 * 2010
 * 2nd Memorial Gilbert Letêcheur
 * 3rd Omloop Het Nieuwsblad Beloften


 * 2011
 * 1st Tour Nivernais Morvan
 * 2nd Overall Tour de Guadeloupe
 * 1st Stages 1 & 4
 * 2nd Romsée–Stavelot–Romsée
 * 2nd Tour du Pays du Roumois