[quote=“cdvma,post:35,topic:37259"”]
Yea the local places that do fills usually charge an arm for what you get and its never pure enough nitrogen. There is always moisture in there so IMHO its not worth it for your average weekend racer. But a weekend racer with too much $, should be fine 
[/quote]
they make attachment that goes onto your air compressor that gets the water out of the air that works very well.