Looked thru the posts and searched but still confused,,I have read everyting from 20s to 40+mm and some that have bought what they thought was right wheels but wrong offset,,
I even did search on google and that just gave me more conflicting information,
so is there a defintive backspace measurement for a 2011 US version XKR with the staggered 19" wheels or do I just go ahead and remove the wheels and measure them to make sure??

 

Here are my stock-to-maximum comparisons, in pictures! The yellow highlights are STOCK, the green is what I want to do myself...
Pay close attention to the ET measurements, nearly every wheel store out there will say that the OEM XF wheels fit the XK, but they do NOT FIT! The offsets are different and the XF wheels will suck in the tires if put on an XK, it looks stupid and opposite of the desired effect.

 

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so stock is 49mm/46mm ? Thanks

 

Wow! I’ve not checked but the 2007-2009 US MYs 26mm which is a massive difference.

 

Not sure if you understand how to measure it. None can provide answer to above mentioned, as you need two figures - size of an alloy (how thick it is) and ET.
For example - for OEM wheel Vulcan (standard on XKR-S, fits XKR too), rear - 10,5", ET52. This one works fine for XKR (5.0).

 

The 2010+ have the Electronic locking differential, which is why the difference.

 

I’m aware, thanks. I was merely commenting how surprised with the difference, since I’ve never checked.

 

I do know you've been in here quite a long time, and was sure you knew. I just wanted this thread to include WHY the difference.