205's are recommended due to better traction in a lot of snow... 225's are great in slick conditions or where the snow has been compacted. This is what I've gathered from the forum so far. 225's I see as a better look but you just have to choose based on your winter driving conditions. If you get a tonne of snowfall in Calgary, perhaps the 205's are best but really I'm not sure if you'd notice that much of a difference depending on how you drive.
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'08 E90 TiAg 335i on Black Dakota | Sport | Nav | Premium | Comfort Access | Blacklines | 19" 269 BMW Performance Wheels | M3 spoiler OEM | BMW Performace SSK | BMW Performance OLED Steering Wheel
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