Originally Posted by fliz
I would guess it was a combination of cost & better mileage.
Plus they knew most WRX owners would be purchasing aftermarket rims anyways.
One of the problems with aftermarket rims is that they don't come in the ideal offset(ET+55) for Subarus. From what I've seen at TireRack the closest is SSRs with ET50--still not ideal. I know that Prodrive wheels come in the correct offset(the ones that are Subaru specific). And 2004 OEM BBS wheels for the STi are the correct offset. But you can only pull those off a STi or purchase them from a Subaru for $700+ dollars each, or you can get them for half price from a recycler or remanufacturer.