Spare Tube: Bike Tires & Tubes - 650b 1.9" - 2.125" Presta Valve | State Bicycle Co.
Schwinn 26" Bike Tire Tube - Black : Target
Amazon.com : Bakcou Fat Tire Bike Tube, 26, 24, 20 x 4 Inch, Heavy Duty, Schrader Valve, Black. Perfect for e Bike, Fat tire Electric Mountain Bike or Any Bike. (20 x 4) : Sports & Outdoors