I have a Shimano Sora 3500 full groupset (FD 50-34, Crankset 170mm length with BB RS500 (BC1.37 x 24), Sprocket 12-28) on my road bike.
I want to make a partial upgrade to 105 set due to my budget limit, by:
changing both shifters to 105 R7000;
changing the rear derailleur to 105 R7000 GS (long cage);
changing the cassette to Shimano 105 CS HG700, 11-34T (fortunately my wheelset can accommodate the 11 speed cassette);
using Shimano 105 SLX CN-HG601 11 speed chain; and
still keeping the current installed Sora 3500 FD, crankset, and rim brakes.
Please kindly share your thought whether is it possible or I need to go with a full group upgrade?
I believe the Sora's crankset and front derailleur should be fine, right?