Originally Posted by Vince and Charlette
Tireman9. The wire mesh stems that came with my 2015 GT were about 4-5 inches long with rubber core. After all of this, I looked at similar ones online and noticed all the others came with retaining clips designed to keep them from flopping around. Mine didn't have those. Apparently that allowed them to flop around violently chafing them enough to start a small leak.
As I understand by reviews, valve extensions connected to rubber tire valve stems can cause a problem. They require rigidity. There have also been reports that some retaining clip are not substantial enough to retain as they should.