what im not getting at is why do you want/need to get smaller wheels(rims)???all you need is tires....go shop around at tire shops and get the ones made for all season or ones that work especially great for winter....dont degrade the looks of the car by slapping on way smaller rims.....the 17"s are fine....and the tires arent low-profile enough to make a difference, youll find that youll prolly spend as much money trying to get a 15" rim set + tires, as you would juss gettin tires for the 17's......IMO stay with the 17"s....theres a reason also why they arent smaller....because its not good on the car....keep the size or go bigger.....