50 mm wider (2")
You will need spacers with stock 18's
Besides, if you are rubbing now, what would happen when you add another inch on the backside.
Not to mention if you ever disconnect it will be an obvious issue.
For about $100 you can get a set of 4 spacers.
Black Forest Green 2012 JKU Sahara - Used to love her, had to trade her.
Rhino 2016 JKU Rubicon Custom. Stick, 3.5" Metalcloak Lift, Metalcloak Full Width Front Bumper, Atlas Rear Bumper,
510 Watts of KC Lights, Drake Fuel Door, Red & White Poison Spyder Diff Covers, 315/70/17 Duratracs on 17x9 Warlords