Pirelli Scorpion SmarTUBE - 42mm Presta Removable Valve Core - 2.2-2.6 Inch - 27.5 Inch eBay Material: This is a lightweight

Material: This is a lightweight steel coil spring

not helmet mountable

Light lever action is paired with super positive indexing to make sure you never miss a shift

Mounting locations: Firmly under the saddle

Pirelli Scorpion SmarTUBE - 42mm Presta Removable Valve Core - 2.2-2.6 Inch - 27.5 Inch eBay Material: This is a lightweightScorpion 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. Scorpion SmarTUBE is a one of a kind inner tube: low weight and volume combine with a high level of reliability not available with an equivalent butyl tube. The perfect solution for marathon