Places to drop weight-
- tires
- wheelset
- crankset
- shifters
- cassette
- chain
- bars
- saddle
- seatpost
I don't know why you would take the time and expense to half upgrade the bike. Either move it to 2x11 or keep it as is.
2x7 with front modern 105 shifting and rear Tourney ****ing?...why?