I've been thinking about getting the Air Ride Technologies arms for my truck.  With stock arms my tires hem up bad on my fender.  I already cut the fender lip off and reinforced with 1/4" rod, still hits.  We cut my uppers and I tore up tires quick.  So my question is, what offset is everyone running with these arms?  I have 20x8.5's with 10mm offset.  I've been thinking about making my own arms, but that's alot of work.  
Anyway, if anyone has any help, email me at 
xseveredveganx@tmail.com.  I'd get back on here, but I'm at work.  
Thanks in advance, guys.