[Ryephile]

You really think BMW partnered with BBS for the variety of wheels available for the whole range of the 1-er? The nature of your question is absurd when you say "best rims possible". This implies there is only one ideal design; BMW offers a few handfuls of styles for the 1 series. I'll give you a hint, they're styles, not painstakingly FEA'd to squeeze out ideal cooling, weight, and strength. Their first order of business is to get past the styling department, then they get a quick wash through FEA and DFM. This isn't Formula 1, it's OEM.

Some people want very light yet strong wheels for maximum unsprung mass for autocross or track use; OEM wheels rarely cuz the mustard for such demands. Others demand maximum "bling" and obviously an OEM won't bother entertaining those people either; the OEM will design a wheel that will offend few and be anonymous-enough for most.