i'm thinking about getting snow tires and aftermarket rims for a '07 bmw 328 xi, good idea?

i would go with standard size rims and tires you will have to get rims for a car with pressure monitoring if you dont want to constantly see a warning when you have winter tires on. (there is a sensor in the rim that monitors pressure. snow tires make a bid difference and i recommend them although with AWD you can get away with all seasons. i have an Audi Quattro and i have gone through winter both with snows and all seasons and you can do it with the all seasons but the snows are recommended for breaking especially.

well i wouldnt put rims from a mid 90's bmw onto your new one. the rims from back then were super ugly and would not match your car at all. but yes they will work your car and your runflats.

my suggetion (and this is what i do for my 2006 325i) would be to buy a custom set of rims with summer tires (anywhere from 18-20 inches) and have those on your car for the summer time. then , when winter time comes around you swap them out for your stock rims wtih winter tires. keep your stock rims for the winter time when the weather is bad, and your more expensive, prettier, custom wheels for the summer time when the weather is good

tirerack.com

wheelsnext.com

Just stick with the factory 16 inch wheels and tire height. You can probably get skinnier wheels and tires for your snow tires but it will probably screw up the handling if you have wider tires in the back than front.

Please stay remote from those form wheels. they only make a solid looking motor vehicle look ridiculous. to not point out screwing around with the coping with. specific' you are able to placed a shorter section wall tire on a motor vehicle and make it cope with extra powerful. yet there's a definite factor to the place it starts off to flow any incorrect way. those "rubber band" tires are high priced and ware out to elementary because of the fact there is not adequate flex to distribute the ware around the full tire gently. in case you flow around a corner a splash to not elementary they only lose there grip because of the fact there is not any flex. those rims are elementary to bend to. in case you hit some thing interior the line which you merely did not see in time you get an inclination wheel. you're able to be very careful approximately curbs to. merely bumping a decrease will warp one. to boot looking ridiculous they make a motor vehicle journey extra tough. you are able to't infrequently stability them. additionally what makes them look so ridiculous on maximum autos is that 4WD look. Which additionally impact coping with through extra advantageous wind it is getting decrease than the motor vehicle at velocity. i does not have them in any respect. There extra fee-effective elementary elementary approaches to look that ridiculous. shall we are saying you have 13's on your motor vehicle. you are able to flow to a 14 or perhaps a 15 on the main with a much broader tire and perhaps a inch to a inch and a nil.5 shorter section wall and be ok . yet i does not flow any farther than a 15.

A 328xi either came with 16 in all seasons or 17 in all seasons. you really don't need to switch to snow tires at all, the stock tire and wheel will be just fine in the snow.

Buy new rims and tires in a package from www.tirerack.com or other supplier. They put together packages that are appropriate for your, or any other, vehicle.