I have a set of Felt hubs on my 2 X 10 speed road bike. I've had them since they were new, they now have ~2500 miles on them. At 1000 miles, the rear wheel became loose, I could wiggle the rim while handling the bike. I took the bike in to the lbs and they adjusted it.
Now again at 2500 miles the hub is loose again. I was able tightened the quick release a full 2 turns, this tightened up the hub. I recently had the wheel trued about 500 miles ago. When I reinstalled the wheel, the quick release was tight & secure.
Why is the hub coming loose? I ride long distance events, a failure could leave me stranded.