I have the Thule rack on my car spread out as far as it will go (about 3 1/2') I'm looking to buy a used Eddyline
S-18 (18'). That means I'll have about 7 1/2' of kayak sticking out past the rack supports on both ends. I'm concerned this might case undue stress on the hull while bouncing down the road. Is this a legitimate concern? Should I consider a J style rack where it lays on it's side?