u/Deleuz1

tldr , last year i started cycling i had a bike way too big for me ( a 56 cm frame ) i moved to a 54 frame , but i cycled all the time with a saddle 4cm longer than this one in video . i had left lower back pain everytime i was pushing , with saddle like that i dont have anymore left lower back pain but im getting tired much faster ? how does fit looks like