I run the 25mm H&R DRA spacers on my 18x8.5" 35mm offset rear wheels and they are the most perfect fitment for my 4.4 wheel flares. I have posted pics last winter showing.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S