I'm trying to inflate my bike with thin presta tyres; but the pump I'm using is universal, it fits loosely. I need to keep one hand in the valve in order to inflate but on reaching 50 psi, I need both hands to push the pump thus I can't hold the valve in place.
On another note I've searched online and there doesn't seem to be any presta specifc pumps, all are universal, which implies they fit loosely.
What are your suggestions?
Update 2: The pump works fine on the other tyre, stupidly straightforward. I'm not sure why on this tyre doesn't work. The tyre looks fine, and in fact was almost at full pressure when I tried to fill it; but lost all the air while trying. I'll replace it and I'll let you guys the outcome. Thanks all so far.
Update: I bought a £50 pump I still have the same issue, see pictures: