steve, i've got an almost-complete 10-pitch group, and as far as i know, 16t was the largest cog ever made.
my guess is that the reason for this was twofold: 16t is the largest cog size that's standard for track racing, and that shimano was going after njs certification for the group (which they eventually got) which bans cogs larger than 16t.
regards,
galen 'looking for 10-pitch chains' pewtherer san francisco, ca
On 11/2/05, Steve Leitgen <sleitgen@charter.net> wrote:
> Does anyone out there remember the Dura-Ace 10 track set?
>
> Better yet does anyone have a cog bigger than 16 teeth? Preferably 18
> or 19.
>
> Steve Leitgen
> La Crosse, WI
> _______________________________________________
>
--
-galen