Might want to start with some of the very, very long discussions out there about this already:
https://www.trainerroad.com/forum/t/road-to-4w-kg-what-does-it-take
Might want to start with some of the very, very long discussions out there about this already:
https://www.trainerroad.com/forum/t/road-to-4w-kg-what-does-it-take