Originally Posted by
Andrew R Stewart
Sorry I can't be of more help. I would not have made the assumption of a coaster brake hub if the description had been more detailed. Now understanding that the hub is a single speed (Microdrive, a brand/model name? Or a generic term?) I suggest you look at the hub shell cups for cracking at the ball track. Too tight a bearing adjustment can work harden the shell's cups and cause them to crack far sooner then needed be. Andy
Also the bearing design (contact angle) might make going to loose balls a possibility. This is the usual first go to for non IGH or coaster hubs that I service. Andy
Being willing to help is commendable, and maybe this thread will help others in the future.
Micro drive is a generic term for a type of drivetrain, mostly BMX and MTB, that uses smaller than standard-sized cogs.
As re cracking at the ball track due to too tight a bearing adjustment, that is warranted, since over tightening was apparently what caused the disintegration of the cup.
Thanks for the advice.