Bicycle-training apparatus

Claim 1

A bicycle-training attachment for a bicycle comprising: a disassemblable frame having a base which can be driven by the rear wheel of the bicycle, said base having a base part, side walls and two releasable support arms extending from said base part which is attached by clamping to the frame of the bicycle; each support arm comprising a horizontal support arm which extends horizontally and protrudes perpendicularly from the base part, an oblique support arm extending obliquely upwards situated at the free end of the respective horizontal support arm, and clamping means between the oblique support arms so that the frame part of the bicycle can be clamped; a square-sectioned socket for mounting of the horizontal support arms on the base part laterally thereof so that the horizontal support arms are inserted into the socket and said clamping means, including clamping screws for restraining of the horizontal support arms in said socket; said base being further provided with two moveable roller elements spaced apart from each other and being fastened releasably to said base part and the frame of said bicycle; said two rotary rollers being arranged at an adjustable spacing from one another to support the rear wheel of the bicycle; the side walls of said base part comprising an upwardly opening U-shaped support having a plurality of bores between which said rollers are mounted at different bore locations for rotary movement imparted by driving the rear wheel of the bicycle; an adjustable guide tube which is arranged on the base part, said guide tube being adjustable in length in telescopic fashion and carrying, at its end, a guide member for the front wheel of the bicycle.