Hi I am new! I am really confused, I want to put 20" Kalimnos on my 2012 XF-S (275). The dealer will sell me them, but they are over £2K or i can get them online for £1K. I am just hearing conflicting stories about if they will fit. Obviously if the dealer fits them they must fit?! My Draco wheels are the same size all around, with 255/35/20 tyres. All Kalimnos seem to come in a set with bigger back wheels, can I just put a bigger set on the back? I am reading conflicting information about off sets. Are the XKR Kalimnos exactly the same set as what would be for an XF? All help very much appreciated. Thank you