Got it on the center hubs, and on for hubcentric adapters. RB, I'm not shedding the original wheels, just using them and the nice DWS as 'winter' tires [to the extent we have winter .....]. I'm considering the 209s to mount summer tires, and use them April-October. The deal is good enough that I'll try the runflat Bridgestones for a few days, then dump them for non-runflat summer tires on the 18 inch 209s. I would love to mount 20" 132s or 87s, but they come dear, as do staggered 20" summer performance tires. The good deal on the barely-used 209s [from a bmw dealer] make this 0ption attractive, even though I expect to drop the RFTs and buy dedicated summer tires. That said, I'm conflicted on what summer tires to buy. You get mixed reviews on performance, wear, etc; I'm leaning toward trying a set of General Grabbers, which Florida reviewers seem to like on hot asphalt and in rain, though they may not last 30k miles [nmt 3 summer seasons ...]. I'm keeping the X5 long-term, BTW.

__________________
2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.