Dia-Compe 610s used with Braze-On Posts

[John Hawrylak]

Saw the new Dia Compe 610 CP brake on RBW and the Grant 'post' stating the use of a lighter return spring (June 2018 post).  Thought these might be a good CP brake for a 'new' frame, but using CP braze-ons.  This frees up the crown hole..

If you remove the rear mounting plat, can these be used with the Dia Compe braze-ons brazed on a new fork/frame???

Does anyone known the maximum fender width these can take??  I was thinking of using 50mm Berthoud SS fenders

John Hawrylak

Woodstown NJ

[Jim C]

Hi, John-

The brake arms should just transfer from the normal mounting plate with pivot posts to a set of brazed on posts. I have not done it with Weinmanns but did the same thing with Mafac Competitions without problem. I have 36 mm Honjo alloy fenders on the bike and there is another 7 mm of space on either side between the fender and the pivot bolt location. My seat stays are the conventional, flat plate style that attach to the side of the seat tube lug. Narrow types like shot in stays will narrow the fender space.

Jim Crux

Niagara Region

Ontario, Canada

[Steve Palincsar]

On 5/8/19 8:38 AM, Jim C wrote:

Hi, John-

The brake arms should just transfer from the normal mounting plate with pivot posts to a set of brazed on posts. I have not done it with Weinmanns

But Rene Herse did it all the time.  Here's an example from 1969  ( http://www.pianosromantiques.com/RHdiagonale.html  )

  

but did the same thing with Mafac Competitions without problem. I have 36 mm Honjo alloy fenders on the bike and there is another 7 mm of space on either side between the fender and the pivot bolt location. My seat stays are the conventional, flat plate style that attach to the side of the seat tube lug. Narrow types like shot in stays will narrow the fender space.

Jim Crux

Niagara Region

Ontario, Canada

On Tuesday, May 7, 2019 at 8:34:44 PM UTC-4, John Hawrylak wrote:

Saw the new Dia Compe 610 CP brake on RBW and the Grant 'post' stating the use of a lighter return spring (June 2018 post).  Thought these might be a good CP brake for a 'new' frame, but using CP braze-ons.  This frees up the crown hole..

If you remove the rear mounting plat, can these be used with the Dia Compe braze-ons brazed on a new fork/frame???

Does anyone known the maximum fender width these can take??  I was thinking of using 50mm Berthoud SS fenders

John Hawrylak

Woodstown NJ

-- 
Steve Palincsar
Alexandria, Virginia 
USA

[Jim A]

I have old Dia Compe 610s installed on braze on posts. The post spacing I have is not the same as the spacing of a backing plate, and the new version may be different anyway, so I could measure but it may not be very relevant to your situation.

You will need different brake return springs for Dia Compe brakes on braze on posts vs backing plates. These should be included with Dia Compe/Dia Tech braze on posts.