X-Tubo City/Tour Tube Valve:Presta Med 41-55mm To ensure that the rim

To ensure that the rim can be used for tubeless systems and with inner tubes

ground-breaking design and one of the lightest aluminum cranksets on the market

Fit Kits include thru-axle or QR with mounting points

Sirrus features a super light Aluminum Alloy and carbon fiber construction

X-Tubo City/Tour Tube Valve:Presta Med 41-55mm To ensure that the rimThe 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