like everyone said the xi comes factory staggered with 8F and 8.5R and 225F/255R I believe (might be sport package specific).
also - I have been told that it's not the rev per mile that matter - it's the rolling diameter (overall diameter) that matters for the xi. i.e., keep the dia diff 0.2" or less.
Go to tirerack - pick your sizes - then look at the specs for the diameter diff.
I am getting 245F/275R for my 19x8.5F/19x9.5R and I have an XI as well.
2008 E92 335xi | Cobb AP Stage2+ | AR DP | ETS FMIC | ALUFELGEN SF-71 DC Blk | HANKOOK V12 | UUC SSK | H&R Coilovers | AE Exhaust |
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