If you look back through this thread this is a common problem, and some of us have had this with smaller chainrings. Spacers will help, although locating them as you fit a read wheel is a bit of a pain. Better still if you can have the spacers as a fixed part of the hub. You can also move the BB slightly to the non-drive side, although watch the clearance between the large chainring and the chainstay. If you think about the geometry, changes at the rear hub are going to have more of an impact than changes at the front. I run a 61T chainring in the outer position, and can't stop the rubbing so I've given up on the 11T cog but I'm running 9 speeds so still have 8 sprockets I can use and 61/12 is a big enough top gear for me.