May be a dumb question but its got me curious, before going for a ride, I stopped and put air in rear tire and got to my destination. When leaving most air came out of tire, luckily I made it to the air pump, got home and tire seems hard two hrs. later, perhaps is it possible that the valve stem got stuck to the point of where it let the air out? If it was a nail or something wouldnt it leak slowly? Just odd.
