Yep, all the way on. Every time it twists to the side it leaks, and when the pressure goes UP it can't hold on. Maybe I need extra long vales to get it way on there but at the moment it sucks. I suppose I could try my valve extenders on there and see how that goes to get it WAY on but it should work as long as there is enough to seal it on the valve stem. It's not like pushing it on an extra inch is any different to the mechanism of it.