I have had the same problem on a auto. It would only leak when parked for some days. If used daily it would not leak even 1 oz. If I were you I would dismount the tire and clean the sealing surface with a wire brush Both tire and wheel. But you could have it completely submerged in a tank to look for bubbles. I am assuming this is the same wheel not just the same position with the Marathons and the G614's.
|