BICYCLE FRAME

摘要

The invention relates to a bicycle frame with a double triangular configuration, having a simple front triangle and two rear triangles connected to a sleeve carrying the pedal box (1), supports for the back wheel axle (2a, 2b) and a support tube (3) for the seat pillar, the top bar (4) of said front triangle and the top bars (5a, 5b) of said rear triangles being aligned practically in longitudinal direction and the top bars (5a, 5b) of said rear triangles being attached to the sides on the top end (4a) of said top bar (4) of the front triangle, said support tube (3) of the seat pillar being surrounded by said top bars (5a, 5b) of the rear triangle, thereby forming an assembly of said tube (3) with the bars (5a, 5b) and the rear end (4a) of the top bar (4) of the front triangle.