Complex sentence: Tankink usually acted as a helper in this team, hardly ever racing for his own success; but he was so much appreciated that the team allowed him to participate in the 2005 Tour de France which he finished in good form.
Split into simpler sentences: Tankink usually acted as a helper in this team, hardly ever racing for his own success. But he was so much appreciated that the team allowed him to participate in the 2005 Tour de France which he finished in good form.