I wonder why valve extenders are not considered STANDARD on an RV??? How in the heck can you reach the inside wheel without them? The first time I bought an RV, nobody told me about valve extenders. I just niaively skipped out with my RV, then went on a trip, tried to check air, then scratched my head. Called the RV dealer (this was in 2004), and THEN they tell me about valve extenders.