Description of π Pacific Dualies 18045 45 Degree Valve Stem Extension - Set of 2: Boost Accessibility and Convenience!
Made of nickle plated brass, with swivel base. Made for Trucks, RV's, and Trailers. Does not fit all motorcyle wheels or bicycles. Install on top of steel valve stems only. Not for use with rubber valve stems. This product does not replace OEM valve stems.
I refused this product because as soon as I received the package I saw a warning NOT to use them on rubber valve stems, something not listed in the specs. Since there are no explanations, I will not use them.
They work but would get a higher rating if the knurled nut was square so it could be tightened with a small wrench instead of just your fingers. I'm worried that they will loosen and I will lose air pressure.
There have been many negative reviews about stem extenders. I only use them to access the inner stem of my 22.5" RV dual rear wheel. Once the tires are inflated I take them off and store them in the bag that came with my 12V VIAIR pump.
To my knowledge valve stem extensions should not be used on the rubber valve stems I have on my RV (much to my chagrin). I ONLY use them when I need to inflate the tires with air and then remove them. Overall - good value for money and a good solution for my situation.
They seem to work well for popping TPMS sensors out of hubcaps without leaking (yet), but I wish they had a nut instead of knurled finger grips to tighten them on the valve stem, very difficult to tighten enough not to twist with the added weight of the TPMS, had to use pliers to tighten, a wrench would have been much better.