The SporTube is the most classic cycling butyl inner tube; the standard interpretation of the most-used air retention system in the world. A complete range offers the size and specification for every kind of cyclist and discipline, from road cycling to urban commuting.Butyl constructionDisc and rim brake compatibleBlack valve stemItem SpecificationsISO Diameter622 / Road / 29"ISO Width (mm)53ISO Width (mm)54ISO Width (mm)55ISO Width (mm)56ISO Width (mm)57ISO Width (mm)58Labeled Size29 x 2.1 - 2.3Shaft TypeThreadedTube CompoundButylValve CoreFixedValvePresta Med 41-55mmWeight210 Pirelli SporTube Tube Tubes EAN: 8019227370355