Kinda missed my point. I was saying you can fit a 17" tyre with aggressive offset under our guards much easier than you can fit a set of 20's which require rolled & pulled guards of equal offsets.

IE: 20x8 +35 v 17x8 +35. The 17x8 will pretty much fit with just a camber adjustment. The 20's due to their stupidly large size, will require a roll and pull of the fender PLUS camber adjustment.