I want to buy this bike:
For most time, I will be fine with the lowest gear being 34x34. However, occasionally I would like to use it for bikepacking. I used to do all my bikepacking trips with my mountain bike with the lowest gears 20 - front x 32 - rear and I always used this lowest gear on long climbs.
Will the shifting work fine, if I put mountain bike crankset and front derailleur instead of the Tiagra shifter and compact crankset? I want to know, whether I can modify the bike for these occasional trips and if having a spare crankset + derailleur is enough.