Complex sentence: He performed well in the 2011 Tour de France though he did not finish as well as his 6th the previous year he came 18th overall and was part of Team Garmin's team time trial victors on stage 2.
Split into simpler sentences: He performed well in the 2011 Tour de France though he did not finish as well as his 6th the previous year. He came 18th overall and was part of Team Garmin's team time trial victors on stage 2.