Tube 49N Plus 27.5 x 2.5-3.0" P/V 48Tube 49N Plus 27. 5 x 2. 5 3. 0" P V 48 Our standard butyl innertube with a 0. 9mm wall thickness that represents excellent value for money and strikes a nice balance between weight and durability 27. 5'' wheels 48mm Presta valve Easily identifiable from the PINK colour coded box Automated hot feed extrusion with hydraulic press cured vulcanization for consistent, high quality, reliable construction Low lead nickel plated valve with a threaded valve