I have a couple bikes running cranks for 72mm BB shell (hollowtec II) that use STI's. I stuck on 105 triple front derailleurs, and got some chain rub when in my high gear front and back.

So, did some reading, and saw in the fine print that shimano road derailleurs are designed for 45mm chainline, while mountain deraileurs are 50mm. Thing is, as I understand there is a difference in pull ratio between road and mountain derailleurs, so I can't just go to a mountain deraileur.

I have done some searching, but am wondering if anyone knows of a front derailleur that will play nice with road shifters and 50mm chainline or if there is an alternate cable routing to achieve the correct pull. If not, I can always use the jtek adapter or a braze-on deraileur with a braze-on adapter for 72mm bottom brackets.