Process for framing bicycles

A bicycle of the kind having a frame unit comprised by a trapezoid and a triangle, conventionally formed with tubular members mounted together complying with dimensions and sizes wherein the alfa angle, with vertex at the saddle support head, is at least equal or higher than 40C; the ratio, R, between the distance A, included between the perpendicular to the bar, passing through the vertex comprised by the sprocket box head, and the perpendicular passing through the front opening of the rear fork eyelets, and the distance, B, between the intersection point of the aforesaid former perpendicular, with the vertex represented by saddle support head, is at least equal or higher than 2,4 and/or the product of such alfa angle, expressed in degrees, times said ratio R = A/B is equal or higher than 100, is framed providing: an alfa angle which is comprised from 34C and 40C, the ratio R = A/B is comprised from 1,8 and 2,4 and the digital product alfa times R is comprised from 70 and 100. While the distance, between the axle of the bar and the axle or hub of the front or steering wheel, taken at front fork eyelets, is higher, than the distance between the axle of the bar itself and the axle of the rear wheel, by at least 25 mm.