Tube with a Presta Valve Stem and 2.1/4.1 Wall Thickness. The thicker wall thickness helps to keep those pesky thorns and other sharp foreign objects from poking a hole in the riding ...
Specialized Standard Schrader Valve Inner Tubes feature a ...
molded method of construction that ensures a consistent thickness of butyl rubber. This means that they don't have any unnecessary weight and will roll smooth, ride after ride.
Specialized Standard 650c Inner Tubes with Presta valves ...
feature a molded method of construction that ensures a consistent thickness of butyl rubber. This means that they don't have any unnecessary weight and will roll smooth, ride after ride.