Road bike butyl inner tube, Continental Race Tube Supersonic 28 inches, ERTRO 20-25 x 622, 700C, weight 50 g, Schlauchrand / Presta valve 42 mm
The pros’ inner tube, weighing just 50 grams. Also ideal as a spare inner tube due to its compact pack size of 8x5x3 cm
Herstellerinformation: Continental, Continental-Plaza 1, 30175 Hanover, Germany, https://www.continental-reifen.de/b2c/bicycle