Always needed. Quality tested and a great value, the 0.9mm thick butyl rubber innertube strikes the perfect balance between weight and durability.Schrader Tube 40mm & 70deg ValveFeaturesSchrader valve (American valve) with a removable valve core0.9mm wall thicknessEach tube passes a 24 hour air hold test prior to packaging Presta Tube 48mm, 60mm & 80mm ValveFeaturesPresta valve with a fixed/non-removable valve core0.9mm wall thicknessEach tube passes a 24 hour air hold test prior to packaging
