Hi Adam,
I had a conversation with Peter Weigle about mounting the dia-compe on posts. It looks tricky. The standard mount version has one spring that is "U" shaped and does both sides, traveling across the back bridge.
Peter told me that there was a kit sold to convert the standard mount center pulls to the direct frame mounted posts and washers. This kit is shown in the 1986 catalog, (Scroll down to a couple of pages from the end to see the accessories: )
http://www.asahi-net.or.jp/
Good luck finding them. Peter had no idea about what you do about the spring, since it looks like you need to replace the original one with two separate pieces. Theoretically, I suppose they could be fabricated. Maybe a trip to Tokyo to search the shops for the replacement kits? Japan in apple blossom season sounds nice.
Grant McLean Toronto, Canada
Adam Hammond wrote: As soon as sending the above, I remembered an Andre Bertin from the Bicycle Specialties website described as having Dia Compe centrepulls mounted on brazed-on bosses (a more elegant name than "studs," certainly.)
It's here:
http://www.bikespecialties.com/
So I suppose it's possible. Does it take special bosses? Does it work with Mafac bosses? Does one merely substitute Mafac springs?
Many questions!
Thanks for your help.
On 15-Jan-08, at 9:48 PM, Adam Hammond wrote:
> A follow up to my WTB from last night (thanks to James for
> responding!):
>
> Can the 450s (or any Dia Compe centrepulls) be mounted on studs? I
> have a KOF Velo Orange randonneur frame in the works, and will be
> using either the Dia Compes or Mafacs. But having a look at the
> photos of the GC 450s on the CR website, I'm not sure the spring
> mechanism would allow for mounting on studs.
>
> See especially:
>
> http://www.classicrendezvous.com/
> photo3.html
>
> Has anyone mounted these on studs?
>
> Thanks,
>
> Adam Hammond
> Toronto, ON, Canada