You are reading a single comment by @dbr and its replies. Click here to read the full conversation.
  • Reet, I've UTFS and read all of what Sir Brown has to offer, but if anyone can give me a simple answer to a simple question, I'd be dead happy an all that.

    Right now I'm using an old MIche road double with a JIS 107mm BB. The chainline is perfect, but the BB is a piece of shit. I presume the Miche cranks are ISO, so I might as well get a good ISO BB (campag centaur or something) to replace the current one. My question is thus:

    What length of ISO BB would be equivalent to a 107mm JIS BB when used with ISO cranks?

    By my calculations:

    "If you install an ISO crank on a J.I.S. spindle, it will sit about 4.5 mm farther out than it would on an ISO spindle of the same length."

                                                         S.B.
    

    So to get the same chainline, I need an ISO BB that is 9mm longer over all to compensate for the crank sitting 4.5mm deeper on the spindle. Vis, I need a 116mm ISO BB... is this correct, before I drop cash on a decent bottom bracket?

    Thanks, and sorry for the resurrection.

About

Avatar for dbr @dbr started