• Not gonna work. Shimano finally changed rear mech pull ratio for 11 speed.

    The reason you can mix 6,7,8,9 & 10 speed Shimano road groups is that no matter what, each 1.0 mm of cable pull always results in 1.7 mm of derailleur travel. But with an 11 speed mech you only get 1.4 mm travel.

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