Well, up front i was planning to drop it ~1". If it gets too tight, though, I'll leave it stock. My question isn't so much about the width as the diameter. I can't go smaller than a 285 (~11.5") on these wheels , and it's a common size. I want to stick with street tires here.

[code]
Setup Diameter Width Offset
--------- --------- --------- ---------
Stock 29.6" ~9.5" +38mm (1.5")
285/55 30.3" ~11.5" +10mm (0.5")
285/60 31.5" ~11.5" +10mm (0.5")
[/code]

So the new tires will protrude 2" more than stock and will have a 0.7" - 1.9" greater diameter.

Question is will that extra 1.2" of diameter make the tires too big, or am I worrying too much (or not enough!)?