Who's the item for: Anyone that owns a bike that currently uses the Syntace X-12 standard

It's designed to be worn under your jersey for low-profile coverage

If you're switching from SRAM to Shimano

It has high friction to stick to the pedal body and low rebound properties to dampen vibrations

Fits 110 BCD Asymmetric 4-bolt cranks

Pirelli Scorpion SmarTUBE - 42mm Presta Removable Valve Core - 2.2-2.6 Inch - 27.5 Inch PDP|PLP|Rail Material Who's the item for: AnyoneScorpion 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