Friends,
I'm a new owner of a Thorn Raven Tour and currently in the process of building it up-- but I've hit a road block. I tried two bottom brackets ( an IRD sealed cartridge and a Primo Powerbite euro ) both bottom brackets will not thread into the drive-side of the shell. I took the eccentric BB to a local bike shop today and they grabbed a Shimano sealed cartridge off the shelf and it threaded right in--no problem.
I find it puzzling that only a Shimano BB would work. Am I really required to use only Shimano?
I welcome your thoughts and insight.
Best regards,
David
Portland, Oregon