there are two types being shown on this thread.. which one are you talking about?The type that you're showing was like the ones that BMW airhead riders typically carry with their tools. Carry just one, and us it as an adapter. The snowflake wheels could be cantankerous to inflate without one. I'm using the angled ones that mount directly to the wheels (Ebay).
+1, I just use my battery booster pack that has a built in air compressor, and an Oxford DigiGauge tire pressure gauge. The gauge works great, swivel head to get at any valve stem, and it saves the readout so you can check the pressure, then read the gauge.The right angled ones offered by Graves are fab. My tire guy at Marietta Motorsports was impressed
and had a lot of negative things to say about the cheap knockoffs.