If you don't have a rack yet,or may not get one for a while but want to be prepared, we recommend the Thule Podium series mounts, as this design is replacing the older TK series.
Thule Podium mounts will work with:
Thule 460 Podium Foot Pack and 58" or longer Load Bars
Thule 460R Rapid Podium Foot Pack and the 53" or 60" Rapid Aero Bars