I pump the tire with air, but when I take the pump out of the tire, the air starts to come out. There must be some kind of a trick to it that I do not know.
The only trick i've found is to get the pump off as quickly as possible so too much air doesn't escape while taking it off. I had to buy a new pump for mine because the one I had was just too hard to take off and all the air came out while I struggled to get it off.
