The bottom bracket of Zigor began with clearance to 10. 000Km. The Maria on the other hand has nothing with 13. 000km. We don’t know until when can influence body weight of each and the force which we do so is believed clearance in the bearing. Following the recommendation of Akmal, each some km are greasing the bearing and at least remove the slack for a few days, then starts again. To the question of what bracket use, always there are people who prefer to place a tobacconist who seems that they usually last more kilometres and there are others who prefer to carry this model because it is very easy to carry one spare and the tools to change it. It seems to change the seal larger tools are needed. As the choice is always the consumer.
SHIMANO HOLLOWTECH II Bottom Bracket