Q-Tubes 27.5 584mm 2.0-2.25" 32mm Presta Valve Tube Specifications ISO Diameter: 584 / 650b / 27.5" ISO Width (mm): 52 mm , 53 mm , 54 mm , 55 mm , 56 mm , 57 mm , 58 mm Labeled Size: 27.5 x 20-2.25 Tube Compound: Butyl Valve: Presta Valve Core: Removable Valve Length: Short 32-40mm Valve Shaft: Threaded Weight (g): 210 g