16 x 1.9/2.125" Schrader Valve.
These good quality CST tubes are made from Du Pont materials. Available in most sizes for all areas of riding.
What Size Do You Need?
Check and compare the relevant numbers on your existing tyre or tube with the sizes listed here.
Schrader Valve = Fatter Car Type Valve
Presta Valve = Skinny Valve. Also known as French or High Pressure Valve.