How much should / could a shock lose after pumping up?

If its losing air is that normal or a sign of service required?

It looks like it loses 10-15psi on removal of the pump but it’s actually re-fitting the pump that does it.

It shouldn’t leak at all.

Ahhhh…that explains it, pumped it up a week or two ago to around 160psi but i just put pump on to check a few mins ago and it was just below 150psi. Was just a tad concerned.

As per Al, otherwise use you sag measurement to check if your loosing pressure, or take it off and stick it in a bucket of water.