This is a recurring question with newbie RV buyers or experienced RV'ers who don't want to spend around $200 to have long solid metal valve stems installed on their dual rear wheels and front wheels. Cheap valve extenders that screw onto original rubber valve stems make it possible to check and fill tires more easily but they can unscrew and/or cause the rubber valve stems to vibrate and crack leaking air from the tire and causing the tire to come apart and have it's steel belt slap the******out of holding tanks, wiring and propane lines as well as causing possible loss of control. Spending 60+ thousand collars on a rig and spending another $200 to have Borg or Tire Man solid metal custom formed valve stems that make tire pressure checks easy, makes sense to me. We don't rotate wheels/tires on RV's, we replace tires after sidewalls show deep cracks generally when tires are beyond five years old by date codes imprinted on tires.
The word "extenders" should not be confused with "solid metal custom formed valve stems" when talking to a truck or RV tire salesman.
