None. The "Z" is some sort of production run indicator. Best regards, Fred Rednor - Arlington, Virginia (USA)
> From: John D Proch <johnprochss@yahoo.com>
> Subject: [CR] Campagnolo Spindle differentiation
> To: classicrendezvous@bikelist.org
> Date: Friday, July 16, 2010, 4:36 AM
> Hello,
>
> Can anyone out there tell me the difference between a
> Campagnolo 68-SS-120 steel
> spindle and a 68-SS 120 Z steel spindle please?
> Thank you very much for any help you could give me with
> this.
>
> Regards,
> John Proch
> La Grange, Texas