Got a fully stock 09 impreza with 16" tires and steelies on it now. I have 18"x8.5" wheels i want to use. What size tire should I get? And will I need spacers? :0 help!!!
I don't have an answer specific to your question, but the advice I can give is don't use adapters or spacers between the wheels and hub, it throws off the center load carrying of the wheel bearing and will destroy the bearings. Click below on 'Related questions' there is a thread a couple years old that has some information and a lot of animosity to boot.
I hate using spacers too...http://www.1010tires.com/Tools/Tire-Size- Calculator
Search Subaru Impreza Questions
Subaru Impreza Experts
Related Models For Sale
Used Cars For Sale