Tubolito X-Tubo CX/Gravel All Tube - 700 x 32-50mm 60mm Presta Valve BlackTubolito X Tubo CX Gravel All Tube 700 x 32 50mm 60mm Presta Valve Black. Good gravel rides guaranteed. The X Tubo CX Gravel All is made from a specially developed X Tubo technology for maximum puncture protection which makes it extremely puncture resistant against thorns nails and broken glass. Therefore it includes a one year warranty after registration including all kinds of flats. Ready for disc and rim brakes. Specially developed X Tubo