Shimano Step it up with the new R7000 105 group in a serious way. The performance level compenent set delivers performance we did not see from top level groups some years back.
The rear derailleur has all the features of the top line Dura-Ace with the option to use a short of medium cage.
SS short cage for cassettes up to 30T
GS medium cage for cassettes up to 34T
Average weight: 225g