They talk about overall roof height, doesnt matter about tyre size, lift, body or suspension, the total height is what matters. They say 50mm total roof height.
So anyway I have a 2018 JKU with a 2.5in Teraflex lift kit from SBR with Falcon 2.1 shocks, not that it matters, with stock wheels & tyres 255/70R18.
Just went out the back & measured my Jeep roof height, 1865mm at its highest point of the roof. Book height from the attached 1865mm.
So in theory going by the book the 2.5in lift fitted has taken me to book height, so can go 50mm above that with the combination of the above. 33's here I come!
https://www.jeep.com.au/content/dam/...Guide%20v1.pdf