Many of those air pumps come with a attachment for the water bottle bracket, after using mine for about 7 mos, I decide to take it off.
And noticed that my left leg seems to come in better towards the frame and my left knee is feeling better. I was slightly angling my leg as I pedaled away from the pump because it would brush my leg a bit..
SO the pump and bracket may have been a slight inteference in my angle of attack without me realizing it.
Its off for good now. I will stick the pump in my jersey pocket.
My cad only has one water bottle rack its the one on the post to the seat.