I personally use Slime in all my tube tires with great success. Helps balance and I never get flats.Scottie
+1It stays inside the tube and doesn't make a mess come time to change tires. If you get a puncture it seals it, so a little comes out of the tube, but that is the point isn't it?Now in tubeless tires, it is messier than the yellow-green stuff in a newborn's diaper. It can etch aluminum wheels too. In a tube tire, so what?