SCORPION™ MTB SmarTubeScorpion™ 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 volumeScorpion™ SmarTube is a one-of-a-kind inner tube: 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 tubeDo not use with rim brakesPresta valve in black