Picked this up from my favorite scrap yard- American Auto Salvage in De Bary FL Saw it last time I was there, but couldn't get back until this weekend. Owner said he thought it worked, but we couldn't test it. $75 Got it home and it didn't work But after poking around, I found the air line tee for the main unit and inflation hose was blocked. 10 minutes Already dismounted one! Atlas brand, no idea how old, but I'll be researching. Oddly, it specifically says it does 16" and 17" wheels !?!