Check the valve assembly in the adapter where you attach the air hose to add air to the strut. It could leak a very little or none at all when it is cooler but then as the summer arrives and the weather heats up it would leak more. Then when you fill it a dust particle , dirt particle or just about anything else would let it leak faster due to the pressure increase when filled and from the heat rising. Or the center core is not screwed in all the way , another cause of a slow leak and they do work loose. With cars that is one cause of flat tires over a long time span ( My tire has a slow leak in it and I have no idea where it is .... excuse ) and for some reason no one ever checks it.
Or someone could be playing games with you. A BB placed under the valve cap and the cap lightly attached back on the valve stem will cause a slow release of air from the valve . When the owner checks it and takes the cap off the BB falls to the ground and is not noticed.
I understand that trick is a good one to use when checking on poachers cars parked out in the woods , when you have to leave the vehicle and go in the woods looking for them. It does not hurt the tire but it keeps the poacher at the vehicle for a while so you can get him.
Or so I have been told. :roll: Also I remember someone saying that if you do the front left and right rear tires then he will be there since few folks have 2 spares.
Or someone could be playing games with you. A BB placed under the valve cap and the cap lightly attached back on the valve stem will cause a slow release of air from the valve . When the owner checks it and takes the cap off the BB falls to the ground and is not noticed.
I understand that trick is a good one to use when checking on poachers cars parked out in the woods , when you have to leave the vehicle and go in the woods looking for them. It does not hurt the tire but it keeps the poacher at the vehicle for a while so you can get him.
Or so I have been told. :roll: Also I remember someone saying that if you do the front left and right rear tires then he will be there since few folks have 2 spares.