Running Compos with 265/65/18 Wranglers.... answers inline.
1. any need to reroute rear AC lines which are behind a plastic cover in the wheel well
No, not even at access height and messing around on curbs. i didnt modify the plastic wheel well at all.
2. any need to reposition hight sensor cable which is on the side of the frame ( front left )
Again, no, but you can do it if you feel like it. I dont see how it could rub.
3.How is the fitment of the full size spare tire , on the car which came with HD package. Will I be able to fit an inflated tire or it has to be deflated?
I deflated a little bit to fit the spare, but my spare tpms has not ever gone off. I took the heat shield off. More details in my big thread about this project. http://www.landroverworld.org/forums/showthread.php?t=24571&page=6
Then how to disable TMPS warning for the spare tire
4 Do you air down and how low can you go with with PSI on 265/65R18
would you air down 255/55 R19 cooper zeon LTZ or just stay with on road pressure ( F-36PSI , R-42PSi) how strong is a sidewall on 19" Zeon LTZs
I think 30 PSI would be ok. Honestly I haven't aired down yet, but ive only been doing dirt/rock type stuff so far. If I were in sand I would try a lower pressure.
5.Access mode - can you drive, turn sharply when car is in an access mode
6.I believe 265/65R18 BFG A/T will be 31.5" how big is descrepancy on the speedometer, can it be calibrated for a new set up.
I didn't change my speedo at all, but its ~5% off. I haven't really used it in access mode a lot, so I should double check at full lock, but when i have used it in access and turned I haven't had an issue. I think even if you do rub a little its not going to be enough to cause issues. I will try and re-test this and get back.
It would be much ea to buy 5 new tires only ( cooper zeon LTZ for stock rims) instead of ordering new wheels from England.
Yes, but....