07 SG I'm wanting to up grade the wheels on the front going to a 21"- first question is do I go with3.25 wide or 3.50-
2nd question- what do you "have to change by going to a 21" wheel in the front? Rotors? Bearings? Fender? Please your knowledge is prechiated!!

 

1. You can go with the 3.25 , or 3.5 I would go 3.5
2.you can use all you stock stuff but looks nice to have matching rotors, spacers. Most new wheels come with bearings. You fender might need to be raised in rear, easy fix.

 

drill front fender mounts out with a 3/8" drill bit. This will allow you to rotated the fender up in the front for more clearance. You should tape a 1/4" nut to your front wheel , and then spin it to make sure the fender and wheel clear.