cambio de eje pedalier de cuadradillo, a ver que tal va ahora

After dealing with the derailleur and sprockets, now it's time for the square taper bottom bracket. We've been dragging ourselves around with a very low-quality square taper bottom bracket for almost a year now, so it's time to replace it and install something better. It's not a huge improvement, but it didn't take much to upgrade what we had.