These are no ordinary bicycle tubes! These extra strong inner tubes stop flats for 2 years because there is Slime inside.
• No more flats for 2 years! • Extra strong with Slime sealant inside • Instantly seals tread area punctures up to 1/8″ (3mm) in size • Seals multiple punctures repeatedly • Non-toxic and non-flammable • Cleans up with water