Originally Posted by
gsa103
Also, screw on pump heads are garbage for a similar reason.
+1 I had Lezyne "Road Drive" mini-pumps on two bikes for a while. They were small, light, efficient and had a separate hose to protect the valve stem. However, they also had screw on valve heads and efficiently removed the valve core from some tubes when the head was removed. After a couple of frustrating roadside flat repair attempts I gave up on them.