Scorpion SmarTube is the mountain bike specific inner tube that blends the innovative features of TPU (Thermoplastic Polyurethane), a specific formulation for the riders that are looking for the best balance between protection against punctures, weight and volume.SmarTube offers low weight and volume combined with a high level of reliability, not available with an equivalent butyl tubeThe perfect solution for marathon racers and trail and enduro riders that are looking for a lightweight, resistant and compact spare tubeThe volume of the Scorpion SmarTube is up to 50% less than an equivalent butyl tube making it the ultimate spare tube: it saves space and doesn't add weight on the trailsDo not use with rim brakesItem SpecificationsISO Diameter622 / Road / 29"ISO Width (mm)45ISO Width (mm)46ISO Width (mm)47ISO Width (mm)48ISO Width (mm)49ISO Width (mm)50ISO Width (mm)51ISO Width (mm)52ISO Width (mm)53ISO Width (mm)54ISO Width (mm)55Labeled Size29 x 1.8 - 2.2Shaft TypeSmoothTube CompoundThermoplastic ElastomerValve CoreFixedValvePresta Med 41-55mmWeight75 Pirelli Scorpion SmarTube Tubes EAN: 8019227409406