A sensational choice, the Slime Schrader Valve Bike Tubes will definitely satisfy the shrewdest critics. Slime keeps on delivering great products at great value. Check out the full range today! All Slime Smart tubes are factory-filled with a precise volume of Slime tube sealant. Smart tubes seek out and seal punctures as they happen, preventing flats, sealing instantly, repeatedly and continuously. Put trust in your tyres and ride without worries.