TheBontrager Standard Fat Tube 27.5x3.5mm Presta Valve. A premium quality replacement tube specifilcly desinged for fat bike tyres. Bontrager Standard Fat Tube 27.5x3.5mm Presta Valve Features Tube is sized specifically for fat bike tyres 0.9mm wall thickness Premium quality, standard weight replacement tubes Valve: Presta Length: 36mm (39mm for 26" x 3.5-4.0)
Best Price: £15.99 from Leisure Lakes Bikes