I did move the spare over, I have a 33.5" spare.The pipe is about 1/8" from the spare, and the exhaust does move. I was wondering if the pipe gets hot enough to do damage if the pipe rests on the spare?
It won't get hot at all, you can test this by hotrodding or pull a big hill and do a quick stop and put your hand on it /ubbthreads/images/graemlins/eek.gif. If ya think it's too hot just bend the hanger a little for clearence or sheild it with some header wrap or some tin foil. Or ya can always let the air out untill it clears /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/shocked.gif /ubbthreads/images/graemlins/grin.gif
I put the Banks 4" monster exhaust on my old truck (2000)and it actually burned my spare. I ended up bolting an aluminum channel between the spare and the exhaust. There wasn't a lot of clearance on the 2000. If the pipe touches the spare then there's a good chance it will burn it. My 2005 seems to have more room because the right shock has been put forward of the axle.
My 4 inch doesn't hit the spare but it is close to the high performance (Ha) Rancho shock boot and has melted the boot. I first noticed it with my camper on (smell of plastic burning) I think there is some flex in the frame with the camper on because it only touches with the camper on and close with it off.
I had a 95 Chevy with the 6.5 diesel and a Jardine exhaust system. The tail pipe slid out of the rubber hanger and would have came all the way out if not for the spare tire stopping it. the result was the tail pipe burned into the tire about 1 inch. Pre-turbo EGTs approaching 1300°F when pulling load.
The temperature at the tail pipe should have been much less but it was hot enough to melt the tire tread!