Tubolito S-Tubo MTB Tube Light, Strong, and Compact Lightweight inner tubes usually come with less durability than standard tubes. Heavy-duty inner tubes are much heavier than standard tubes and are difficult to bring along as spares. The Tubolito S-Tubo MTB Tube is even lighter and even more compact. It is designed to have the smallest package size possible. With a removable valve stem, the tubes have a size of only 3. 5cm x 5cm when rolled up. The puncture resistance is the same as with standard rubber tubes with a weight of only 45g for the 29" tube. Features The tube has a size of only 3. 5cm x 5cm when rolled up The puncture resistance is the same as with standard rubber tubes Lightweight at only 45g for the 29" tube SPECIFICATIONSWheel Size26", 27. 5", 29"Width1. 8" - 2. 4"Valve Type Presta Removable Core Yes Stem Length / Type42mm Weight42g - 45g | Tubolito | S-Tubo Mtb Tube 26" X 1. 8-2. 5", 42Mm | Rubber