Originally Posted by Norm Peterson
I think you're talking about the shipping tie-down attachment brackets that serve double-duty as reinforcement for the bump stops.
You can safely cut most of these brackets away, leaving a little at the bottom for the bump stop to use if you're retaining the OE bump stops or using OE-style aftermarket replacements. That is what I did for my 18 x 11 Forgestars. I also had to cut back the rear shock boots, though with 20's this might not be necessary.
With 11" wide rear wheels, you may need an adjustable-length PHB for its firmer bushings to keep from getting any rubbing during extremely hard cornering. Depending on tire size you may need to intentionally offset the axle a little as well - a PHB-controlled axle moves more during turns in one direction than it does for turns in the other.
I wish that was it... Its actually the unibody-chassis at the points where the rear coil pockets are. But, really ... since the chassis wall here tapers in as you follow it up.... The wheel clears no problem. Its literally when the vehicle is unsprung and the axle hangs at the fullest extension. Then the inner lip of the wheel will rub on the chassis. enough to require you to muscle the wheel to spin it...But then you're chaffing the finish of the wheel, even if you can't see it. So the best bet is to put each wheel on one at a time... lifting the axle on each side and a jack stand right on it high enough to clear.... Then...you're good.
And on the hilly roads where i drive there are points where the suspension travel takes it up to this limit, but as far as I can tell...there is no rubbing.
Having the Watt's link is a plus. And the Airlift. Even with the bags fully extended like when I go down a really f'd up dirt road... there's still no rubbing, I can see the inner wheel lips are not rubbed to hell. So I'm good.
I just looked and see that AM now lists the rear offset for their 20x11's as 55mm offset which is tight but should be good with the axle unsprung on a lift. and they only have the 20x9's not the 20x10's for the staggered front wheel option. So I'm guessing they wanted to be safer than sorry? Although their 19's still come in 19x10's.
At least my front's offer a wider contact patch to compliment the rear width.
So Camaro-ish of me. ;-)