I'm not exactly sure what you mean, but as a rule of thumb, three bearings on one shaft is a no-no. It's close to impossible to align them perfectly and if the shaft that they all sit on is short and/or stiff then it can apply enormous side loads on the bearings; particularly the middle one.holty wrote:af rayspeed are working on a new type rear bearing, it a double bearing so much stronger
I've seen seriously strong bearing housings crack due to this.