In 2016, Kimmann finished 2nd, behind Joris Daudet at World Championships in Medellín. A day earlier, he won the time trail, which meant he is the last World Champion in this discipline. At the 2016 Olympics he finished seventh. He fell in the quarter finals, injuring his ankle ligament and a metatarsal bone. He had to recover from his injuries between August 2016 and February 2017. The serious crash of his friend and fellow BMX-cyclist Jelle van Gorkom in January 2018 while the two were training made deep impact on him.