Our motorhome came with the same braided extensions. On occasion the curb side inner extension will come just loose enough that it is not possible to add air or check pressure.
I remove the wheel cover, remove the extension and blow air through it to make sure there is no obstruction. Then I put the extension on again and make sure it is on tight. In the 6 years we've owned the motorhome, this has only happened twice, so not too big a deal.
When we purchase new tires next year, we will have Tire Man valve stems installed at the same time. Since the extensions aren't a major hassle, I didn't think it was worth the money to install on the current set of tires.
-Michael
