Trying to correct my UCA rub

[rideexileex]

I'm glad to hear that you hate wheels spacers.

To your specific question, I don't think you're going to see a big difference between the two as far as tire to UCA clearance is concerned. With UCAs, you're 'pulling' for clearance, and wheels are 'pushing' for clearance, if that makes sense.

I do think wheels will give the biggest difference overall, as it increases the whole track width for stability, where as UCAs will optionally help add castor and a bit more droop (if the front suspension setup allows). Teeter - Totter.

 

[4Runner4Leon]

The higher negative wheel offset will definitely help with UCA clearance. One thing to keep in mind with negative offset (like the -12 that rkntoy mentioned on his MK6, or the -12 I'm running with the Pro Comps) is that the tires will swing in a wider arc, and thus have a higher tendency to rub against the flares or the wheelwell/pinch weld. I'm seeing some mild rubbing with this setup with a 2" lift and 265 tires, so obviously 285 would be worse. As others said, lift does not make a difference at full stuff, unless you limit the compression.