Just one other matter not described is cable drag. The cable routing of some bikes is like the Gordian Knot (mentioning no names, Nevertheless they talk Canadian French to aero obsessives, One more can make quite, pretty big bikes & throws them & worst of the many 'really rated' price https://deansgzod.blog-kids.com/33023006/indexing-bike-gears-no-further-a-mystery