Kayaker

Hi I am on cusp of buying a 2011 Edge SEL but need clarification as to how much weight the Roof Rails hold. Three different dealers have told me 3 different numbers. if I cannot carry two kayaks for a total weight (including rack attachments) of 120lbs then the vehicle is off my wish list. I am not assuming that the 2011 is the same as the 2010 so if anyone actually knows the weight restriction I would be grateful. Thanks