FALISOMED handicap cycling-help device

for bikes with 4-edged bottom bracket axle, for cyclists with a full prosthesis or a completely stiff leg, comes with hitch (coil spring, ball bearing spindle bracket and fixing clamp), silver, only for frames with a seat tube diameter of up to 31,0mm suitable
the original crank must be shortened approx. 70mm from the bottom bracket. Then a hole with 8,1mm Ø must be drilled, 10mm upwards from the shortened crank, where the ball bearing spindle bracket is attached with the hitch. The cranks are now mutually offset on the bottom bracket that now the shortened crank shows backwards while the other crank is up.
The pierced clamp at the rear end of the hitch must - (shortened crank pointing to the back) - be attached on the rear axle, which arises a tension of the spring by 10-15mm