Over the years the tyre has evolved gradually and with this every day gains new shapes and models. However, even with all technology and evolution in the machines that produce it in the company Levorin, is happening a phenomenon called Mole bead. Thus, the present research was developed with the purpose of identifying the possible causes that are generating the defect of the soft bead, in the production line of the factory where bicycle tires are made, aiming to eliminate the defect (s) and how Consequences stop wasting materials, time and manpower. The efficacy of the research was assessed through participatory research and application of a questionnaire. With this research it was possible to perceive that the problem of the soft bead phenomenon occurred due to a misalignment (height and width) in the bases where the chestnuts are fixed. There was also a lack of regulators to fix housing adjustment. And the preconformator chestnuts were also not compatible with their measurement. Thus, the alignments of the chestnuts arms, the production of chestnuts with dimensional by measure and the manufacture of regulators were performed.