The basic 4-wheel kick scooter is a solid scooter up to a 120 kg payload, with one handbrake and a single rear axle with one single rear brake disc. The handbrake works on right and left wheel, as there is one single rear axle. The grip of the handbrake can be switched to the left side.
Seats, posts and all accessories can be mounted.
The non-motorized scooter cannot be changed into a motorized version, as the rear axle on the motorized version needs two disk brakes and two separate rear axles.