I will attempt to provide all the Stats regarding these to my particular vehicle in this one post for easier reference - because these were all of the things I pondered before making the switch....
This is a 2015 WK2. Its White. Limited, 4X4, with Springs (OEM Stock Suspension as of the date of this post). No Off Road Package Quadralift. I DO have the OEM Tow Package with the self leveling system.
NON HD Brakes.
NO Spacers were needed nor used.
Wheels and Tires are from a 2017 Wrangler Rubicon with probably less than 100 miles on them. Factory Balanced. Overall just at or around 32" Diameter.
No Alignment was done, nor does it feel as though it needs it.
Size: 255 75 17. Tires are the BFG Mud Terrains.
No rubbing seen when first installed, full left, full right. No rubbing felt on road over usual ups and downs of asphalted roads.
No rubbing felt or seen when doing easy to moderate off roading on rocky paths.
These are NOT TPMS wheels and tires. Yes, the TPMS Sensors inside the computer are alerting me to ZERO pressure almost overtime I start the WK2. Its not hard to scroll back down to the trip computer. After that, all that is seen is the tiny amber warning light in the lower right hand corner as a warning.
Psi at time of photos were around 25. Made for a smooth ride on a off pavement. I am positive my gas mileage suffered, but I wasn't worried enough about that to do any real thinking about it. The tires NOW are at 37 since I am going to be ON ROAD for a little while. I also considered how much heavier the WK2 is versus a Wrangler when determining what psi I wanted. I WILL note, that when On Road at 25 or so Psi, the usual bumps I have come to notice each time on my route to and from work, have almost completely dampened to NOTHING. I haven't driven the route since going to 37 Psi, however.
Tires are louder (My WK2 is a Limited and does NOT have the Noise Canceling interior). But it sounds like a man's WK2 and not your neighbor's wife's mall crawler, and that was the point in the first place. Its not annoyingly loud, some tunes block it out easy enough. Plus the cabin is insulated from sound a lot better than a Wrangler. Its all relative, and all these things should be considered, to some degree, I would think.
Handling hasn't really suffered much. Obviously this set up takes away from the handling the regular 18 inch road tires provided. But on curvy, 40 to 50 MPH roads leading to the trails, I wasn't low in confidence in taking turns. And this was at 25 Psi.
Had a severe heavy rainstorm, with flooding on roadways. The WK2 didn't budge left or right when going in at Speed Limit speeds. I don't recommend doing that, but I am am purposeful idiot sometimes. Still, it held its own.
The Spare JUST fits in the spare compartment, with the bins removed of course. The lid/floor of the cargo area sits unsung, by about a half an inch. Its not high enough to be wobbly. The casual person wouldn't notice its popped up and unsung, but you will notice it. Because your a car/Jeep guy. Its more than acceptable to me, given I will have the proper spare tire in tow.
The OEM jack supplied raised the WK2 enough to swap the Wheels/Tires, WHEN I USED A TWO INCH OR MORE Cinder Block base. I did NOT try it on the ground directly.
The WK2's OEM lugs secured the wheels perfectly. I had read that those attempting to use the Lugs from the birth Wrangler were too small. I can confirm that the OEM Lugs of MY WK2 work just fine. Remember tho, I have NO spacers. Not sure if there would be any kind of difference between MY LIMITED's 18 inch wheels lugs, versus say a standard Laredo wheel's lugs though.
The WK2 after measurements, after the swap raised the vehicle almost 2 inches in the rear, before shock settlements. Going to the rear to pop the hatch is NOTICEABLY higher. Is it a Monster truck? No. .......The front about maybe an inch and a half before settlement. The Lugs to ground on the Rubicon Wheels are a tad taller than the 18's Lug to grounds, I noticed, so this was expected and welcomed.
Few more things. The tires stick out wider than the 18's, however after playing in a small amount of mud, did not spray mud all over the side, like I wanted. With more mud and work, I could maybe have achieved it, but I just didn't have enough to really play with. Its a hot summer right now and any rainfall dries up too quick.
Pictures are below....... Phew! OKAY. Now what did I forget to tell you? Let me know.