It would help if we new the chain ring you are using. I'm with AeroGut, I'd consider replacing the chainrings, or replace the crankset with one compatible with your BB if necessary.
I think a 46/30 chainring with your existing cassette would be almost ideal for those wanting more low end grunt and have a double chainring. That would give you a gear inch range w/26" tires of 22 - 92 without using the 11t cog with reasonable spacing. And a 109 GI with the 11T cog going downhill or coasting with a 50 mph tailwind.
Last edited by xroadcharlie; 06-14-19 at 08:39 AM.