Slime Extra Strong Self-sealing Inner Tube 18 X 1.1.-1.4 Inch Schrader Valve

These are no ordinary bicycle tubes! These extra strong inner tubes stop flats for 2 years because there is Slime inside Seals multiple punctures repeatedly Extra strong with Slime sealant inside Instantly seals tread area punctures up to 3mm in size Non-toxic and non-flammable Cleans up with water Prevents flats for 2 years