Assembly
Wheel
Exact Specification
700x30-43c Airolution Tube with Schrader Valve
Manufacturer
Kenda
Purchase here
https://shop.kendatire.com/Inner-Tube-p/12700012air.htm
Related Repairs
Replace Innertube
You can use pretty much any inner-tube as long as they state that it is good for 700x40C tires.
While you can fit a Dunlop or Presta Valve in the rim holes this is not recommended because the inner-tube could be pinched by the edges of the rim hole leaving you with frequent flat tires and irreparable inner-tubes.