Abstract: The necessity to get higher degrees of safety through better stabilities of the “Scooter-Cyclemotor-Bicycle-Motorcycle” has made these 2 kinds of assemblies (front and rear). The Front assembly always has forwarding the “2 steering, inclining, shock-absorbing, braking, parallel front wheels” and with the already existent 1 rear-wheel in the rear side, or with the Rear-assembly, that has the “2 inclining, shock-absorbing, braking, parallel rear-wheels” (Page: 1,2,3,4,5,6,7./7). Those 2 kind of assemblies are singularly, or both, suitable to build a vehicle with ‘3, or 4 wheels ’ (with 2 rear-wheels), always determining 3 or 4 points of contact on the ground (not only 2). The vehicle with ‘3, or 4 wheels’ is safer, it's more vertical steady and answers the highest degrees safeties either, with a second passenger on board, or with major loads upon (like heavier accumulators use for electric or hybrid power and/or if it uses major load-structures like new body carriage).