17" wheels cannot be fitted to any 2013+ LR4 in Aussie spec as the brakes are too big & as we know there's only a handful of aftermarket 18" brands available - Compo's being the most expensive but the
best in terms of strength, weight & quality. (and arguably looks!)
The 3.0 lt. diesels, V8's & SC V6's certainly need the bigger brakes & nobody in their right mind would swap out the OE calipers for earlier, smaller units from the LR3, just to be able to fit 17's.
In terms of tire size, fitting the 265/60's instead of 265/65's avoids ALL the potential problems and still
gives a real increase in sidewall. I've found the sidewall strength of BFG KO2's exceeds that of cheaper
brands & gives me everything I need for serious rock climbing, plus mud, ruts, sand etc.