by Misc Mfg.
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The Presta Valve Adapter For Schrader Valve Rims does exactly what it says. This little gadget fills the void in the valve hole allowing you to safely run presta valve tubes in your rims that are drilled for the bigger schrader valves. This is convienent in a BMX application being that popularity of the Tubolito has grown so much it's pretty tough to find the schrader valve version.