Here is another similar solution from Stop N Go. It is a right angle valve extension that is used as a temporary extension for when you are filling up.
At least they tell you it is a
temporary extension. The Concours rear tire was extraordinarily hard to adjust pressure with the stock tire stem. Somebody told me BMW had a $9.95 brass extension that worked great. I went to a dealer in Denver, was treated very well and ended up spending about three hours just hanging around and talking bikes.
The next time I needed to adjust the tire pressure, I put the little extension on. I doubt if it weighed an ounce.
I never took it off until one Saturday afternoon when I pulled onto I-76, heading for Lake McConaughy in Nebraska. I got up to about 75, set my Vista Cruise, took my right hand off the throttle and felt a funny little twitch. I put my hand back on the throttle just in time for the bike to start trying to throw me off. I pulled in the clutch and just held on, not using any brake. I managed to get off the Interstate and stopped.
The rear tire was completely flat. I couldn't begin to get the bike onto the centerstand and it wouldn't sit on the sidestand until I took off the panniers and the top box. And even then it was close to falling over. I dug out my compressor,hooked it up and started trying to get some air into the tire. That's when I realized the rubber OEM stem was broken off on the side of the stem opposite to the 90-degree bend on the extension.
It may not have weighed much, but it had flexed that stem until it broke. Someone told me a couple of days later that it was
temporary extension and should be taken off when you weren't using it.
True. So
very true.
45- 85- and 90-degree metal stems are all available and work great!