FixedFiend626, A problem that could arise is the backside of the FD cage will interfere with the middle ring when shifting to the outer chain ring, if the difference between the middle and outer chain rings isn't great enough. I have a FD meant for a 52-42-30T triple barely clearing an eight tooth difference, but it's also working on a smaller diameter 24-34-42T chain set.

I'm guessing that you're credit card and/or lightweight touring with that crank set. A less expensive option is to use a cog on back with one or two more teeth. For example:
48/15=~86 gear inches
52/15=~93 GI
52/17=~82 GI.

Brad