Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-21-09, 07:13 PM   #1
alamont
Junior Member
Thread Starter
 
Join Date: Oct 2007
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Help! Strange Shimano 600 Downtube Boss shape

Hi,
I've got a question for an 80's Schwinn/Shimano expert out there. I have a 1984 Schwinn Super Sport that I'm trying to adapt for bar-end shifters. The current setup is downtube Shimano 600 shifters. I was told at my LBS that because of their thin profile these friction shifters were an 'aero' version. I bought a set of Shimano downtube cable stops, but when I removed the shifter levers, the boss' shape had a weird round base with a key shape(?) in it that points up the bar, toward the handlbars (see pictures below) The cable stop won't fit over the boss' base.

So my question is, are there downtube cable stops available that will fit this strange boss shape? I'd like to avoid the clamp-on type stops if I can. I could find very little in the forums other than these bosses are strange and sometimes called Italian style bosses.

Any help would be greatly appreciated.
Attached Images
File Type: jpg shimano600_01.jpg (47.8 KB, 395 views)
File Type: jpg shimano600_02.jpg (62.9 KB, 270 views)
File Type: jpg shimano600_03.jpg (63.7 KB, 185 views)
alamont is offline   Reply With Quote
Old 06-21-09, 11:05 PM   #2
raverson
Senior Member
 
raverson's Avatar
 
Join Date: Dec 2004
Location: beautiful Chehalis, Wa. 98532
Bikes:
Posts: 1,361
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I modified a set of Shimano Light Action DT friction shifters to bar end using the Riv pods and used the original clamp with the modern aluminum Shimano cable stops. Fitting required a fair amount of material removal from the back side of the stops to clear the keyed base.
Attached Images
File Type: jpg 2015%20-%20Copy.JPG (93.3 KB, 213 views)
raverson is offline   Reply With Quote
Old 06-21-09, 11:16 PM   #3
alamont
Junior Member
Thread Starter
 
Join Date: Oct 2007
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the suggestions raverson and Bob. I think I'm going to try Dremeling out the the back of the stops. I did some measuring and think I can remove enough material in there to fit over the stop's keyed base, as you both suggested. This way if I ever want to go back to the original downtube shifters I haven't messed up the original boss shape.

Thanks again!
alamont is offline   Reply With Quote
Old 06-22-09, 03:44 PM   #4
luker
juneeaa memba!
 
Join Date: Oct 2003
Location: boogled up in...Idaho!
Bikes: Crap. The box is not big enough...
Posts: 5,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
um, is that eared piece part of the boss or is it removable?
luker is offline   Reply With Quote
Old 06-22-09, 03:57 PM   #5
alamont
Junior Member
Thread Starter
 
Join Date: Oct 2007
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's part of the boss. although it almost looks like it's more part of the frame. Either way it's definitely not removable (aside from grinding it off) From what I've gathered this was a weird boss base style used only in 1982-1984ish schwinns and it's hard to find anything out about them.
alamont is offline   Reply With Quote
Old 10-17-09, 03:16 AM   #6
philg
Junior Member
 
Join Date: Oct 2009
Location: Melbourne, Australia
Bikes: mtb, road, cx, geared, singlespeed, 1x7, etc.
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How did you get on with this? I have the exact same problem.

Shifters were Shimano 600 and the bike is a Paconi made by Kevin Wigham. I'm guessing its from the early to mid eighties.
philg is offline   Reply With Quote
Old 10-17-09, 04:27 AM   #7
philg
Junior Member
 
Join Date: Oct 2009
Location: Melbourne, Australia
Bikes: mtb, road, cx, geared, singlespeed, 1x7, etc.
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Interestingly I notice from one of the threads below that the braze-on in question is refferred to a "A-type", if I am not mistaken.

Schematic for 600 6207 Shifters.
philg is offline   Reply With Quote
Old 10-17-09, 07:25 AM   #8
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by philg View Post
How did you get on with this? I have the exact same problem.
I took a Shimano 600 Arabesque shifter (shown at right - Shimano 105 Golden Arrow at left) and ground it down to match the style of my Campy Victory components:



One could do similar to the Golden Arrow as well.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 10-21-09, 09:48 PM   #9
JVera
Junior Member
 
JVera's Avatar
 
Join Date: Oct 2009
Bikes: 1986 Schwinn Madison
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Does anybody know if taking the arabesque downtube clamp on shifters and removing them from the clamp would work on the bosses mentioned above?
JVera is offline   Reply With Quote
Old 10-22-09, 08:39 PM   #10
Charles Wahl
Disraeli Gears
 
Charles Wahl's Avatar
 
Join Date: Jul 2007
Location: NYC
Bikes:
Posts: 3,108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Shimano was so enamored of this new "standard" that they made adapters so that you could fit your Shimano shifters onto Campy (the real Italian style) braze-on bosses. Check out the top of the diagram posted in this thread. It's too bad they didn't make an adapter that did the reverse -- turn their reverse-keyhole boss back into a Campy boss.

If the cable stops that fit a Campy boss will (or can be ground out to) fit over the Shimano boss, perhaps you could grease up the boss and downtube, and fill the interior of the cable stop housing with wet plaster or (if you're brave) epoxy. Then install, cure, remove, degunk, and reinstall.
Charles Wahl is offline   Reply With Quote
Old 10-22-09, 08:55 PM   #11
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by JVera View Post
Does anybody know if taking the arabesque downtube clamp on shifters and removing them from the clamp would work on the bosses mentioned above?
Yes, but you must have the crescent-shaped adapter made for fitting these shifters to the braze-ons (the grey pieces in the photo of the blue Raleigh below). They must be adapters for this design - later ones will not fit properly.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 10-22-09, 09:14 PM   #12
JVera
Junior Member
 
JVera's Avatar
 
Join Date: Oct 2009
Bikes: 1986 Schwinn Madison
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thank you, I will look for those adapters then.
JVera is offline   Reply With Quote
Old 12-17-09, 05:09 AM   #13
VintageR
Yes.
 
Join Date: Oct 2007
Bikes:
Posts: 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by alamont View Post
... So my question is, are there downtube cable stops available that will fit this strange boss shape? ....
No.
(Shimano proprietary design. No one other than them cared for it.)
VintageR is offline   Reply With Quote
Old 06-13-11, 01:00 AM   #14
MACAQUE
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Any update on this? Does anyone make a cable stop that will fit over the keyed area, or will I have to put a dremel to some shimano units? I want to put bar ends on my gf's bike.
MACAQUE is offline   Reply With Quote
Old 06-13-11, 07:12 AM   #15
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MACAQUE View Post
Any update on this? Does anyone make a cable stop that will fit over the keyed area, or will I have to put a dremel to some shimano units? I want to put bar ends on my gf's bike.
No adapters have been designed in the meantime. Before you start cutting stuff up, try using a pair of these - they'll serve the purpose, and re-route the cables so that they do not rub the bosses:



http://www.google.com/search?um=1&hl...l272l427l0.1.1

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 06-13-11, 09:14 AM   #16
MACAQUE
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the link Kurt, I've seen these problem solvers before. The problem is that I want to be able to use the braze ons, I don't like just having them exposed. I already have a extra set of these:

so I was thinking about just slotting out a section so that it will fit over the key.
MACAQUE is offline   Reply With Quote
Old 06-13-11, 09:17 AM   #17
ColonelJLloyd 
Senior Member
 
ColonelJLloyd's Avatar
 
Join Date: Dec 2009
Location: Louisville
Bikes:
Posts: 8,287
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
I dealt with this last week on a Ross 290S. It came to me with incorrect Suntour DT shifters so there was no stop. The levers could be pushed very far forward (past parallel with the DT). I scrounged up an pair of Shimano 600 DT levers from the same era.
__________________
Bikes on Flickr
I prefer email to private messages. You can contact me at justinhughes@me.com
ColonelJLloyd is offline   Reply With Quote
Old 06-13-11, 09:25 AM   #18
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MACAQUE View Post
Thanks for the link Kurt, I've seen these problem solvers before. The problem is that I want to be able to use the braze ons, I don't like just having them exposed.
You might want to find a different frame then.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 06-20-11, 04:10 AM   #19
philg
Junior Member
 
Join Date: Oct 2009
Location: Melbourne, Australia
Bikes: mtb, road, cx, geared, singlespeed, 1x7, etc.
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MACAQUE View Post
so I was thinking about just slotting out a section so that it will fit over the key.
Yeah I ended up just dremmelling the cable stops and was very happy with result.
philg is offline   Reply With Quote
Old 06-20-11, 04:22 AM   #20
frantik
Chainstay Brake Mafia
 
Join Date: Mar 2011
Location: California
Bikes:
Posts: 5,974
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by philg View Post
Yeah I ended up just dremmelling the cable stops and was very happy with result.
i would think this is the smartest idea.. just modify existing cable stops to fit
frantik is offline   Reply With Quote
Old 06-20-11, 06:48 AM   #21
philg
Junior Member
 
Join Date: Oct 2009
Location: Melbourne, Australia
Bikes: mtb, road, cx, geared, singlespeed, 1x7, etc.
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Attached Images
File Type: jpg IMG_0220.jpg (20.2 KB, 120 views)
philg is offline   Reply With Quote
Old 06-20-11, 09:21 AM   #22
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well done - very nice. Did you have to shim the casing to fit the smaller bolt, or was it a drop-in fit?

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 06-20-11, 11:58 AM   #23
MACAQUE
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by philg View Post
that looks awesome. i'll have to set aside some time this weekend to do the same. what bits did you use?
MACAQUE is offline   Reply With Quote
Old 06-21-11, 01:45 AM   #24
philg
Junior Member
 
Join Date: Oct 2009
Location: Melbourne, Australia
Bikes: mtb, road, cx, geared, singlespeed, 1x7, etc.
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
No shims, it all just bolts up nice and snug re-using the old bolts. The new bolts didn't fit.

I used a bit like the "100" one in the image, and a cheap imitation dremel. I could made it all fit a bit more neatly but the tool kept overheating in my hand. I now have a proper dremel.

Attached Images
File Type: jpg 4.jpg (95.1 KB, 56 views)
philg is offline   Reply With Quote
Old 06-22-11, 01:25 PM   #25
MACAQUE
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
thanks for the tip philg!
MACAQUE is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:09 PM.