for what its worth, my last two metz purchases had issues like this... Now I dont buy them anymore.

 

This is what I was afraid to hear, gonna mount the wheel tomorrow and put some miles on it and see what happens. So far so good I checked the tire and rechecked a couple hours later and lost no air but the road test should put it to the test. Glad now I only have one on the front, still running a Dunlop on back.