Hi folks! I think I'm starting to think about improving this bike, Im seriously falling in love with it

- Bottom Bracket : Is it wrong if I replace it with this? (PROWHEEL - 13025)
- Eje acero CR-MO sellado.
- Contacto de eje 6T. (Hexagonal)
- Medida Eje: 153,5 mm
- ŘTapa cartucho: 51,5 mm
- Armazón cartucho: 68 mm
- Presentación: Caja PROWHEEL




Brakes: Found this Shimano Sora model not very expensive. What do you think about it? (Shimano - Dual Pivot Rear Brake Sora 3000 Clipper, Color Black)

Thanks and good rides!