What does A/V mean on an inner tube package? I've got a bike tire that says "(32-630) 27 X 1 1/4" on it. I've got also got an innertube that says "700X18/23C -27X1 **A/V** ". I'm trying to figure out if the innertube is the right size for the tire. I gather that my tire has a 27" diameter and a 1 1/4" width. It seems that the innertube is designed for a tire that's 27" by 1"... which seems like it's not the right size. But is that correct? Or will the innertube fit? And in either case, what does **A/V** mean in this context? Many thanks, D

## Schrader valve/Schrader tube

### aka "American valve" or "Automotive valve"

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The Schrader valve consists of a valve stem into which a valve core is threaded, and is used on virtually all automobile tires and most wider rimmed bicycle tires. The valve core is a poppet valve assisted by a spring.