I found this airace pump to be difficult to use with the prestadunlop valves installed on my own bikes tires and i would frequently have great diffic

I am lowering the rating for this pump from 4 to 2 stars because of my experience with it over the past few months which finally led to me throwing it away and replacing it with a bontrager pump that i purchased at our local trek bicycle shop

This is an update added 102217 to my review originally posted on amazon 91116