The set includes the 2 bearings and the spy seal needed for the rear wheel
To unscrew the nut on the left side you need to make a small tool, especially not unscrew with a chisel. Take a metal plate 5 or 6 mm thick and make two M6 threaded holes in the axis of opposite notches. Screw 2 screws whose end you will adjust to match the notches as well as possible.
The set includes the 2 bearings and the spy seal needed for the rear wheel
To unscrew the nut on the left side you need to make a small tool, especially not unscrew with a chisel. Take a metal plate 5 or 6 mm thick and make two M6 threaded holes in the axis of opposite notches. Screw 2 screws whose end you will adjust to match the notches as well as possible.