Shimano Dura-Ace Di2 FD-7970 Bicycle Front Derailleur - 10 Speed - Love Di2...but - Love Di2...and this unit is probably the best part of it all...front mech shifting has never been better. The only reason why not 5 stars are. The setup is finicky...and none of the online videos or manuals will help in any meaningful way. You'll need to base screw plate only if you braze on mount is bolted on facing the front of the seat tube. The nickel/chrome plate on the mech (like the 7900) flakes off way too easily...for a AUD$450 unit this is less than ideal quality control. Most likely a metallurgy issue with high carbon steel vs electroplating mixtures. Almost no frames will allow, or even allow (with a drill) to get the cable to internally route...a pity as this is the area the cable has to interface with the nasty chain/chainring combo!
(Posted on 13/05/2011)