Bicycle frame comprising a front triangle and at least one rear triangle, wherein said at least one rear triangle is elastically deformable and comprises a strut and a base connected to each other in a non-articulated manner in the area corresponding to the rear wheel axle of the bicycle, wherein said base is connected to said front triangle at a first pivot point, wherein a link is pivotably connected to said front triangle at a second pivot point and to said strut at a third pivot point, and wherein a shock absorber is pivotably connected to the front triangle and to the link, said movable rear triangle, link and shock absorber forming a rear suspension system that is movable along a range of positions from an initial position in which said shock absorber is not compressed to a final position in which said shock absorber is most compressed, characterised in that the third pivot point accordingly follows an actual trajectory around said second pivot point and the rear triangle is configured to adopt at least the following positions: - an initial position, in which the third pivot point is at an initial point that is an intersection point between said actual trajectory and a theoretical trajectory, wherein said theoretical trajectory is circularly arranged around said first pivot point and corresponds to said rear triangle moving with an absence of deformation, said rear triangle thus presenting no deformation when said third pivot point is in said initial position, - a first intermediate position in which the third pivot point is at a first intermediate point and the rear triangle presents a maximum deformation in a first direction (d 1), - a second intermediate position in which the third pivot point is at a second intermediate point that is another intersection point between said actual trajectory and said theoretical trajectory, said rear triangle again presenting no deformation when said third pivot point is in said second intermediate position, - a final position in which the third pivot point is at a final point, and in which said rear triangle presents a maximum deformation in a second direction (d 2) different to said first direction, where the difference between the maximum deformation in a first direction (d 1) and the maximum deformation in a second direction (d 2) is less than 10%. - an initial position, in which the third pivot point is at an initial point that is an intersection point between said actual trajectory and a theoretical trajectory, wherein said theoretical trajectory is circularly arranged around said first pivot point and corresponds to said rear triangle moving with an absence of deformation, said rear triangle thus presenting no deformation when said third pivot point is in said initial position, - a first intermediate position in which the third pivot point is at a first intermediate point and the rear triangle presents a maximum deformation in a first direction (d 1), - a second intermediate position in which the third pivot point is at a second intermediate point that is another intersection point between said actual trajectory and said theoretical trajectory, said rear triangle again presenting no deformation when said third pivot point is in said second intermediate position, - a final position in which the third pivot point is at a final point, and in which said rear triangle presents a maximum deformation in a second direction (d 2) different to said first direction, where