I was thinking I would get the 90-degree valve stems whenever it was time for tires on my RGC. But...., I bought the extension hose, about 6 or 7 inches long, at a HD dealer for, I think, $9.95 or so. Works great. On my rear tire I can reach up and screw it on the valve stem without even having to see it then check/fill/let out air very easily. And I have determined that when taking the extension off the tire valve stem I unscrew it as fast as possible and I only lose a 1/2 lb. of pressure so I compensate for that when I fill. And now I won't be buying 90-degree valve stems when I need tires.