Complete my 1st and second triathlon this summer (southern hemisphere) I have just added a set of tri bars to my bike (done 400km with them) I find myself getting wobbly, or weaving, when in the aero position. I have changed my bike setup, this has helped. I have been keeping note and its not in any particular gear, or hills or anything.

Any thoughts on what it could be or how I could correct it? or is this a common occurence?