The Tubes have a seamless construction, with a mold-cured vulcanization, to ensure uniform roundness Size: 28" - 700x25-32mm Valve type: 42mm Presta Valve Contents: 4 Continental Inner Tubes ...

Alternatively, your bike may have a Presta valve or a Dunlop valve ... This should give you enough space to reach inside the tire and pull out the inner tube. Once you have removed the inner ...