Yes you can, I am running 19's on the front and 20's on the rear. I had to go to a lower profile tire. Keep in mind that to do so will sacrifice the ride quality somewhat IMO. Keep in mind too that if you change the offset you may have to go with a camber bolt kit to bring the aligment in to avoid wearing out the tires. I also think there have been some that have gone with 20's up front as well. I could be wrong.