Teravail Standard Tube - 26 x 3.5 - 4.5 40mm Presta ValveTeravail Standard Tube 26 x 3. 5 4. 5 40mm Presta Valve. With removable valve cores choice of valve and two widths Teravail Fat Tubes have what you need for big tires. 1. 0mm wall thickness Teravail Fat Bike tubes feature environmentally friendly soy ink printing on recycled cardboard Master Cartons of Teravail Fat Bike tubes contain twenty individually boxed tubes TECH SPECS Wall Thickess 0. 9 Weight 500 Shaft Type Threaded ISO Width (mm) 89 ISO