Wrong frame hole
03-22-12 | 03:22 PM
#1
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Joined: Feb 2012
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Wrong frame hole
The hole for the bolt that holds the rear brake on the frame is drilled top-down and I found out the reason reading a post on this forum. The frame is designed for Mafac brakes and the same bolt holds the fenders also. What could I do to use a new pair of brakes? I don't want to drill the frame. I thought about using disc rear brakes but the frame is old enough and it has no mount points for disc brakes. Any advice could be very helpful.
03-22-12 | 05:01 PM
#2
Senior Member
Joined: Apr 2009
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Dia compe made a special brake mounting adapter for these rear bridges. Someone posted a picture of one here on this forum about a month or two ago. maybe you can find a link to that thread and picture. Finding the actual part may be a bit more difficult, but there are probably thousands of them around on rusting frames of that era.
In the meantime you might be able to make do with 2 angle brackets, a 6mm screw, and a 6mm cap screw.
In the meantime you might be able to make do with 2 angle brackets, a 6mm screw, and a 6mm cap screw.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
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“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 03-22-12 at 05:29 PM.
03-22-12 | 05:05 PM
#3
Constant tinkerer
Joined: May 2010
Posts: 8,040
Likes: 156
From: Madison, WI
Assuming there is clearance and you cannot find the proper adapter I would consider this a good candidate for rigging up some sort of home made drop bolt. https://sheldonbrown.com/home-drop.html
Unfortunately, you'd still need to change the the direction by 90 degrees somehow.
Unfortunately, you'd still need to change the the direction by 90 degrees somehow.
Last edited by FastJake; 03-22-12 at 05:09 PM.
03-22-12 | 05:24 PM
#5
Senior Member
Joined: Apr 2009
Posts: 39,897
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Do you have a drill press and a bit of hand skill? If so, I'll detail how to make the part you need fairly simply.
Otherwise, you'll need a friend in Pittsburgh who'll visit a very unique bike shop (sorry I forgot the shop's name) and dig one up. Maybe if you offer the Hillrider a few beers he'll make the pilgrimage for you.
Otherwise, you'll need a friend in Pittsburgh who'll visit a very unique bike shop (sorry I forgot the shop's name) and dig one up. Maybe if you offer the Hillrider a few beers he'll make the pilgrimage for you.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 03-22-12 at 05:28 PM.
03-22-12 | 06:48 PM
#7
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Joined: Feb 2012
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Do you have a drill press and a bit of hand skill? If so, I'll detail how to make the part you need fairly simply.
Otherwise, you'll need a friend in Pittsburgh who'll visit a very unique bike shop (sorry I forgot the shop's name) and dig one up. Maybe if you offer the Hillrider a few beers he'll make the pilgrimage for you.
Otherwise, you'll need a friend in Pittsburgh who'll visit a very unique bike shop (sorry I forgot the shop's name) and dig one up. Maybe if you offer the Hillrider a few beers he'll make the pilgrimage for you.
03-22-12 | 07:24 PM
#9
Insane Bicycle Mechanic
Joined: Mar 2008
Posts: 10,156
Likes: 1,122
From: other Vancouver
Dia compe made a special brake mounting adapter for these rear bridges. Someone posted a picture of one here on this forum about a month or two ago. maybe you can find a link to that thread and picture. Finding the actual part may be a bit more difficult, but there are probably thousands of them around on rusting frames of that era.
In the meantime you might be able to make do with 2 angle brackets, a 6mm screw, and a 6mm cap screw.
In the meantime you might be able to make do with 2 angle brackets, a 6mm screw, and a 6mm cap screw.
Here's the thread with the picture, about 2/3 of the way down:
https://www.bikeforums.net/showthread...-Brake-Schwinn
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Jeff Wills
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Jeff Wills
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04-06-12 | 11:35 AM
#10
Junior Member
Joined: Feb 2011
Posts: 88
Likes: 9
Yo, supplementing my inscrutable post about things which hold threadless brake shoes with post about brakes your frame came with; eBaY item 270945089681 (you can search clb or "clb -tones" in the cycling category and find ridiculously priced units as well as ~$40 calipers postpaid.) The shoes look like forged dural and clb is a serious firm, and I was tempted by their stuff when it used to be available from my framebuilding supplier. French engineering is always intriguing.
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12-12-12 11:38 PM
