My Fuji Absolute 1.0 flat bar road bike w/105 group set, came with a 52/39/30 triple crank. I nearly always ride on the 39 and only had it on the 52t ring one time, just to test it for a mile. No use having a ring that one never uses, so I looked around for a smaller ring. I found a 46t that was made to be a part of a 46/38 cyclo double crank. It fit perfectly, looked like a matched set.
However it goofed up my front derailleur and I couldn't adjust it to get it to work.
So as my bike still had a free tuneup coming and it needed a few other adjustments, I took it back to the LBS and let them adjust everything. Now it shifts pretty well.
Thus I now have an odd 46/39/30 triple crank, paired with a 10-speed 12-27 rear cassette. I think this will work well for me. At least I might use the "big" ring once in a while. This gearing isn't much different than a lot of hybrids that have 48/38/28 triples, but most of those don't have GXP external bearings.