Specialized Standard 27.5"/650b Inner Tubes with Presta valves feature a molded method of construction that ensures a consistent thickness of butyl rubber. This means that they don't have any unnecessary weight and will roll smooth, ride after ride. Features: Individually cured for consistent tube thickness Removable valve core Specifications: Diameter: 27.5" (650b) ISO Diameter (ETRTO): 584 Valve Type: Presta Valve Length: 32mm, 40mm Removable Valve Core: Yes Puncture Protection: - Weight: -