The butyl rubber compound that the Q-Tubes 650c x 18-23mm Presta Valve Tube is composed of is lightweight and offers protection from the elements. The threaded presta valve features a removable valve core making it easy to add sealant for even more protection while riding. The 650c tubes are available with a 32mm, 48mm, 60mm or 80mm valve length that will work with pretty much any wheel available. The tube weighs roughly 90 grams.
Q-Tubes 650c x 18-23mm Presta Valve Tube
$6.99
If you own a triathlon bike with 650c wheels, you understand that sometimes tubes are hard to come by. The Q-Tubes 650c x 18-23mm Presta Valve Tube will make a great spare or replacement tube if you flatted your current tube.
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