hello all,

I've been meaning to ask this question, and it's one I've been pondering over. I have a thule roof rack system on my 245. the basic set-up, as it relates to my question, is this: 2 50lb bars placed parallel pointing from driver-side to passenger-side of car and 2 bike trays placed parallel pointing from front to rear of car. this set-up forms a rigid square-ish frame that is clamped to the rain gutters on either side of the car. now my question is, does a roof rack increase the structural integrity of a car's body, in particular the roof by decreasing or eliminating torsional flex that may happen when a car makes a turn onto a road depression (e.g., drainage gutters, potholes, etc.), which may cause the car's body to "contort" due to the uneven level of the car? does this all make sense? I understand a roof rack will not make my roof stronger in the sense that it won't make it sustain more weight directly on top of it or make the body more rigid, but will it make the roof more rigid and less susceptible to flexing? thanks.