The Belgian rider won the Points Jersey in one of the Grand Tour events.

He also won two of the five monuments in cycling.

Planckaert won the Points Jersey in the 1988 Tour de France.

Planckaert also won the 1990 Paris-Roubaix Classic in front of Steve Bauer of Canada and Edwig Van Hooydonck of Belgium.

In addition, Planckaert won the Tour of Flanders Classic in 1988.