The thickness of the gears and the spacing on the 7spd SH FW is wider than on the 9spd so in most likelyhood it would not shift the 7 spd. By the same token, Campy ERGO 8 shifters would not work on the 7spd either. It's my belief that Campy and Shimano make their parts different so they can not be interchanged. Some after market companies like Wheels Mfg make spacer kits to overcome this difficulty but I don't think they make anything to convert Shimano 7spd to be compatible with Ergo 8spd. you can e-mail them at www.wheelsmfg.com They are usually good about replying.