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The Tubolito S-Tubo City/Trekking Inner Tube is ultralight, extra durable bicycle tube. For a long time, the innertube has been overlooked in the bicycle industry. Tubolito are changing that. Their vision: the perfect inner tube. Street, trail or city - developed for the optimal cycling experience.Available for 700c city and touring bikesNewly developed material for maximum puncture resistanceCan t be punctured in everyday useWorld Premiere: 1-year warranty by manufacturer for all flats30-50mm widthChoose from a Presta or Schrader valve