Abstract: A bicycle frame comprising a saddle tube (1) connected to a single upper bar (3) and a single lower bar (4), said bars each having a front end carrying a head tube (2), said frame further comprising a strut (5) and a base (6) each having a rear end that carries a means (7) of association to respectively one side of a rear wheel of said bicycle, said strut—respectively said base—being formed in a single tube (8, 9) with the upper bar (3)—respectively lower (4) bar—, said upper (8) and lower (9) tubes being associated respectively with one side of the saddle tube (1) by extending continuously on either side of said saddle tube.