Michelin Protek Max 29x1.85-2.30 FV40 TubeAnti-puncture chamber using sealing liquid and its exclusive technology by which the rubber works in compression, so it tends to close the hole. Michelin Protek Max 29x1.85-2.30 FV40 TubeThe famous Protek Max technology reaches these cameras, recognized by the specialized press and endorsed by the prestigious Gold Award from Eurobike (2011).A revolutionary design that makes the rubber in the compression chamber work, plugging the puncture, joins the sealing liquid inside.Its extreme resistance to punctures is coupled with easy assembly and excellent pressure maintenance.Valid for 29 "tires and thickness between 1.85 and 2.30 (ETRO 47/58 - 622)Weight approx. 360gr.