Are you serious!? you get to fit 30" tires in a stock sidekick? I will problably try it since I drive in the city "a lot" (more than I like to) how did you do it again? I'm taking notes  
yep. they are true 30s, too. The same wheels and tires used to be on my sami. Like I said in the first post, I slapped 'em on there and jsut looked to see what needed trimming. I was ready to get some coil spacers or whatever if I needed them,, but I didn't.
The first thing I noticed was that inside the rear bottom part of the front wheelwell, there was a little part that served as a mounting point for the front end cap of the plastic rocker trim. I took the trim off so I could flatten that out. I put the trim back on after I mashed it down and I honestly dont remember if its still there. Again..it wasnt the trim itself that rubbed, it was a metal piece inside the lower rear of the wheelwell to which the trim mounted.
Next I noticed that the very bottom part of the front rubber bumper cover, the part that's kinda like a mini air dam, would touch the lugs when the wheel was turned. It took me about a minute per side to neatly trim off around 6-8 inches of that lower dam. Its not even noticable unless you are looking for it.
Then I jacked up the control arm and went lock to lock to see where else it might contact. It was firmly up against the plastic inner liner of the wheelwell in the rear part towards the top, at about 10 o'clock as your are looking at it from the side of the vehicle. I pulled out the inner fenders and saw the metal had a bulge there. I took the tire off and got a 3 lb sledge and just hammered it out in there to get the clearance necessary to fully stuff the tire and allow it to turn without rubbing.
Now I can drive on the street all day with no rubbing unless I take a corner really fast or hit a huge bump at speed. The rear tire rubs the top of the wheelwell opening really lightly when its stuffed in the back. If I try real hard offroad I can get the front tire to touch something up front, but I dont even know what it is. Doesnt damage the tire or the wheelwell, so I dont really care.
I plan to try and get the inner liners back in before winter sets in (I'm in New England), maybe just screwed through them directly to the metal of the inner fender. That's less important on the passenger side than the drivers side since there is a molded plastic thing on the drivers side which is the air intake for the motor. I went through last winter with it that way, worrying that slush and ice and whatever would get up into the intake, but it never did. I have even driven through some soupy mud up over the hubs and didn't get anything in there. It doesnt matter a whole lot anymore since I made a more direct intake for the tracker that doesnt use the under-fender plastic thing. Works great but at idle it sounds like someone firing ping pong balls rapid-fire through a long plastic vaccuum cleaner hose. Makes a nice throaty honk when sticking your foot in it though.

That's basically all there is to it. I have a used Calmini 2" lift for the tracker that I might put on sometime, but it honestly doesnt need it and I dont believe in having any more lift than necessary. Not to mention Massachusetts limits you to 2" of lift anyways. I like just throwing the stock wheels and tires back on for annual inspection and not having to sweat it failing for being too high.
~daxe