A bicycle frame having a first frame section carrying a handle bar assembly and a front wheel assembly; a second frame section carrying a crank unit and a rear wheel assembly; a first primary connecting arm carried by said first frame section being received into a second primary connecting arm carried by said second frame section, wherein said first primary connecting arm is telescopically carried by said second primary connecting arm for extending and retracting said first frame section relative to said second frame section; a mounting plate included in said second frame section extending over said rear wheel assembly; a plate suspension member included in said second frame section connecting said mounting plate to said rear wheel assembly for controlling relative motion between said mounting plate and said rear wheel assembly. A rider platform is carried by said mounting plate for accommodating a rider.