To answer this question you need to know what offset is built into the 18 x 9 wheel, and also the width and height of the tires you are considering. It's not just a question of wheel size.
Go to
Custom rims, wheel tire packages for your ride - RIMSnTIRES.com
then click on Fitment Guide on the Left Column. Input your car year make and model then click on the Compare Sizes link.
Now on the left you will see your stock tire/wheel size, on the right you can play with different tire/wheel combos to see what might fit. For example, using this tool with your proposed wheel/tire combo predicts you will have a 3% error on your speedometer, and that a 40 mm offset on the wheels will probably fit the tires inside your fenders. Have fun.
Go to
Custom rims, wheel tire packages for your ride - RIMSnTIRES.com
then click on Fitment Guide on the Left Column. Input your car year make and model then click on the Compare Sizes link.
Now on the left you will see your stock tire/wheel size, on the right you can play with different tire/wheel combos to see what might fit. For example, using this tool with your proposed wheel/tire combo predicts you will have a 3% error on your speedometer, and that a 40 mm offset on the wheels will probably fit the tires inside your fenders. Have fun.
