Hubcap Are those spark plug adapters? If so thats a genius idea but I'd be worried about fuel in my tire but it is better than being stranded.
There's a valve of some sort, it pumps "outside air" into your tire... it is
basically just a light-weight coiled hose in your saddlebags... very small
and (supposedly) puts out a lot of air, fast... maybe driven by
5/6 *100 hp on a Valkyrie

...
-Mike