Extension Valves on Inside Dually, Yes or No

BORG Dually Valves! I was a skeptic and a procrastinator for several years. I had to add air often and it was difficult to do. I bought ours at Six Robblees, a truck/trailer enthusiast shop, about eight years ago and they have been absolutely wonderful. I added Air-Through Caps so no unscrewing. Just go wheel to wheel. I can check six tires in well under a minute. ***AND*** They rarely need air!