Going with the 1TD Style 740M wheels on my week 40 xDrive40i build with ZMP, since those appear to be the largest wheels offered with all-season tires.
We live in suburban Chicago, and on my AMG, I'm fine swapping the winter set on/off (still able to the maintain a stagger). But the X5 will serve primarily as my wife's daily driver, at least initially... so a square set up of all-seasons should do just fine.
But should the garage get re-swizzled down the road, I may want to mount winter tires on the 740M wheels and get a set of performance tires on a staggered set of (BMW?) wheels. MPPK might at that point also be in the cards, if available
Question 1: Where can I get the specs on the 1PA (742M), 1XB (744), 1XN (741M) wheels? I'm specially looking for the
offsets, should I go the aftermarket route.
Questions 2, 3 (and 4): What is option
840, and why -- according to the Order Guide -- would it be added with the 21" and 22" option wheels? (If my build doesn't include 840, would I be prevented down the road from installing a staggered summer set up?)
Question 5: Where can I find tire specs, including BMW-recommended winters? (My frame of reference: an AMG product manager for the E63 monitored a Private Lounge forum, and was able to provide a table of specific Mercedes-approved winters.)
Thank you!
UPDATE: Just found in Order Guide. 840 is top speed limiter increase. Curious why that would necessarily be done in conjunction with larger wheels.