X-Tubo City/Tour Tube Valve:Presta Med 41-55mm Sirrus features a super light

Sirrus features a super light Aluminum Alloy and carbon fiber construction

The reliable and crisp Shimano drivetrain provides a robust 2x9 drivetrain that can handle everything you're throw down while confident braking from Shimano hydraulic disc brakes seals the deal of the century

The Tecno-3 Push System dials in fit along the entire length of the shoe

an expertly tuned construction that provides the ideal degree of both stiffness and efficiency

X-Tubo City/Tour Tube Valve:Presta Med 41-55mm Sirrus features a super lightThe Tubo City Tour is pumped up for performance with and increased wall thickness making it 3X tougher than standard rubber tubes, and holds pressure much better. It's the perfect choice for longer rides though nature, everyday commuting and for E Bikes. X Tubo series tubes are intended for every day use, and feature thicker material construction over the standard series Easy to install and serves as a lightweight alternative for tubeless riders