Review on 🚗 Enhance Your Vehicle's Performance: Slime 20140 Dually Tire Valve Extenders with Mounting Brackets by Samuel Bowen

Okay, I didn't buy these for their intended purpose, which was to expand valves on dual tires that are constantly spinning at 70 mph. I understand why mounting brackets might not always be able to handle all those centrifugal forces. Instead, I bought them to lengthen the valves on spare tires on two different cars. a trunk that requires the jack and wheel to be removed entirely just to check air pressure. At least this tire was clean. The other car was an SUV with an unreachable valve mounted on top of a dirty spare tire that hung from an agonizing chain under the rear of the car. Since these spare wheels don't spin, the extension brackets were able to attach things to the wheels. They are well suited for this particular use. I see how they can cause problems if used as intended. UPDATE 1/25/2015: Mine doesn't leak at all. However, the mounting system leaves a lot to be desired. The one I thought was securely fastened just popped out the last time I checked the air pressure. I "repasted" it. It doesn't matter in my application. But I would be very hesitant to use them on spinning tires.