Re: Tyre options for 2010 WK
On a WK, once you get to (or go above3) 30.5" diameter, depending on the width, you' will have to start modifying stuff... for example, a 265/65r17 is 30.6" x 10.4", and you have to cut about 1/4" - 5/8" off the top UCA-to-spindle bolt (but no pinch weld cutting/modding... if you go taller, you will have to go narrower (due to the bolt) and do some pinch weld modding...
The 30.5" x 10.4" equivalent in an 18, is about 265/60r18, which is just a hair (.1") shorter than the above mentioned 265/65r17.
(and cutting the bolt is super easy... with an air-powered cut-off tool, it takes about five to ten minutes per side, including removing and re-mounting the wheel.)
Should note that I have the Bilstein 5100's install (fronts at lowest setting), which gave me a bit more wheel gap all the way around, from stock...