That is very odd, I had tubes in all 4 of my titans after about 6 hours on my Scram at Haspins, Since I picked up the Dirt Devils in September I have had zero air loss, I asked alot of ?'s before I got mine and have been very pleased, I would try e-mailing greenball tire direct and see if they will make it right[img]i/expressions/face-icon-small-wink.gif[/img]