my caddy is the same way with the rear skirt and the bags I cant get my rear tires out, so I had to let some air out until I had room to clear the skirt my worst problem I had with bags is I've blown an airline 4 times now...once was in the middle of a street going to a car show but the rest were at home luckily...but it's not fun!
Oh, I see. I have full wheel arches on my Buick, so I couldn't really visualize what you guys were talking about.
How did the lines blow? I'll ***ume it rubbed on something. I went overboard protecting mine. I ran the DOT hose inside 1/2" irrigation tube, the tough poly stuff ment for direct burial.
I had a flat on the rear of my 53 chevy out in the middle of nowhere. I was in high school back in the 60s. No spare, no cell phone (only **** Tracy had one back then)! I had about 15 miles to go, so I drove it on the flat. Didn't take long for the tire to leave the rim, then it was smooth sailing. Not much traffic at 1:00AM! Got home and parked it behind the house. Changed the wheel the next day. Sure did grind up that steel wheel but made it home without any other damage to the car.
I think you're talking about the ARB X-Jack. It inflates by hooking up the hose to your exhaust. http://www.arbusa.com/Products/Tow-Straps-And-Recovery-Gear/Exhaust-Jacks/46.aspx
Also it doesn't help if you've ran the exhaust under the axle Just trying to change rear tires in your shop can be enough to make ya want to start throwing things. I've been known to removed the valve-stem valves, smear grease on the tires, and just man-handle them off. There's really no point in carrying a spare with some cars.