Suntour Symmetric Conversion
11-13-13, 07:05 AM
#2
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Suntour made a part to attach to that braze on but it only had cable stops, not bosses. Also I think the last one I saw on ebay went for something like $50. Unfortunately you best bet is to get a clamp on housing stop like from Problem Solvers "Back Stop" or use some other clamp on shifter with the shimano stops.
https://problemsolversbike.com/products/backstop
Just put a small stainless screw in the brazeon and use it as stop for the clamp.
https://problemsolversbike.com/products/backstop
Just put a small stainless screw in the brazeon and use it as stop for the clamp.
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11-13-13, 07:36 AM
#3
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^ most straightforward solution. Another thing might be to fabricate a slotted clamp that would slide around the symmetric mount and would permit shimano or suntour threaded posts to be held on each side by retaining their back flange in a custom slot. Simple clamp on the bottom like an old bottle band clamp. Make it from stainless or from aluminum, as it's not under a terrific load. Then, add Shimano stops.
11-13-13, 07:42 AM
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I found this for you in this old thread,
https://www.bikeforums.net/showthread...09housing+stop
Originally Posted by Bikedued 
Actually you will probably need a clamp on style cable stop, and use the mounting block for the Symmetry shifters to keep the stop from sliding on the down tube. Find an allen bolt to fill the hole, to keep water out. Find an old cheap ten speed for the clamp on stop, or one of the guys here should have one.,,,,BD
Use the existing Suntour Symmetric Shifter housing plus some flat sided Shimano cable stops. Hacksaw flush the housing protusions beneath where the shift levers mount. Pray. One existing shifter mounting bolt is long enough, the other not. It's impossible to match threads with a new bolt. Get a longer one and add some JB Weld. You are good to go...
https://www.bikeforums.net/showthread...09housing+stop
Originally Posted by Bikedued Actually you will probably need a clamp on style cable stop, and use the mounting block for the Symmetry shifters to keep the stop from sliding on the down tube. Find an allen bolt to fill the hole, to keep water out. Find an old cheap ten speed for the clamp on stop, or one of the guys here should have one.,,,,BD
Use the existing Suntour Symmetric Shifter housing plus some flat sided Shimano cable stops. Hacksaw flush the housing protusions beneath where the shift levers mount. Pray. One existing shifter mounting bolt is long enough, the other not. It's impossible to match threads with a new bolt. Get a longer one and add some JB Weld. You are good to go...
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Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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11-13-13, 07:44 AM
#6
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Love it.
11-13-13, 08:02 AM
#7
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Does the friend want bar ends? Or do you want barends so he can have indexing? Depending on how much he loves the Le Tour Luxe you might consider offering the frame for trade.
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11-13-13, 08:30 AM
#9
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I have a set of the flat backs I'll trade for some curved backed if you want them. But making flat ones is a pretty straight forward process.
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11-13-13, 09:03 AM
#11
Senior Member
I make these, which will solve all your problems, and in style to boot. If you want one you'll have to contact me about it by PM.
11-13-13, 09:23 AM
#13
Senior Member
Thanks. By the way you could install a 6mm set-screw (with a touch of loc-tite) flush inside the existing bolt-hole in your brazeon. Then you could (most likely anyway) install my clamp directly over the brazeon, more or less obscuring the brazeon from view. Some chance though that the existing brazeon might interfere with the jackscrew and/or the band at the top-center part of my clamp, which would make it NOT work. However my clamp would definitely work installed uphill from the brazeon, though the brazeon would be visisble, though not too ugly IMHO if you just installed a set-screw instead of a bolt in it. In any case, PM me if you think it might work on this or future builds once you're able.
Last edited by Drakonchik; 11-13-13 at 09:32 AM.
11-13-13, 09:24 AM
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that's weird... I got an email that raleighSports quoted me but I don't see his post.
The Suntour part I am speaking of, but can't find a pic, was made by Suntour to replace this shifter mount. It bolted to the boss and had to sort of outrigger looking things that hung down on both sides for cable stops.
The Suntour part I am speaking of, but can't find a pic, was made by Suntour to replace this shifter mount. It bolted to the boss and had to sort of outrigger looking things that hung down on both sides for cable stops.
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11-13-13, 09:50 AM
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I found this for you in this old thread,
https://www.bikeforums.net/showthread...09housing+stop
Originally Posted by Bikedued
Actually you will probably need a clamp on style cable stop, and use the mounting block for the Symmetry shifters to keep the stop from sliding on the down tube. Find an allen bolt to fill the hole, to keep water out. Find an old cheap ten speed for the clamp on stop, or one of the guys here should have one.,,,,BD
Use the existing Suntour Symmetric Shifter housing plus some flat sided Shimano cable stops. Hacksaw flush the housing protusions beneath where the shift levers mount. Pray. One existing shifter mounting bolt is long enough, the other not. It's impossible to match threads with a new bolt. Get a longer one and add some JB Weld. You are good to go...
https://www.bikeforums.net/showthread...09housing+stop
Originally Posted by Bikedued Actually you will probably need a clamp on style cable stop, and use the mounting block for the Symmetry shifters to keep the stop from sliding on the down tube. Find an allen bolt to fill the hole, to keep water out. Find an old cheap ten speed for the clamp on stop, or one of the guys here should have one.,,,,BD
Use the existing Suntour Symmetric Shifter housing plus some flat sided Shimano cable stops. Hacksaw flush the housing protusions beneath where the shift levers mount. Pray. One existing shifter mounting bolt is long enough, the other not. It's impossible to match threads with a new bolt. Get a longer one and add some JB Weld. You are good to go...
Original post with full instructions at https://www.bikeforums.net/showthread...=1#post8232412
11-13-13, 10:07 AM
#17
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Here is a pic of the rare obscure Suntour part,
mmmmmdonuts posted it in this thread, which oddly enough is about a Super le Tour, https://www.bikeforums.net/showthread...ube+cable+stop
mmmmmdonuts posted it in this thread, which oddly enough is about a Super le Tour, https://www.bikeforums.net/showthread...ube+cable+stop
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11-13-13, 10:44 AM
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That Sun Tour part is something that a home machine shop hobbyist could make. Looks like it would take some barstock, careful planning, and about 2 hours millling machine and hand finishing time, so expect to pay him or her about $120 for their trouble. Or the machine shop hobbyist could make a simple rectalinear aluminum block threaded to hold two (purchased) cable stops like the ones that bolt onto bosses to use them with modern brake-lever shifters. Advantage of that plan is that the cable stops have adjuster barrels. Disadvantage may be the price of the bought parts.
Unfortunately, and unlike some of my other hobbies, seems that few bicyclists are machine shop hobbyists, equipped to do their own machine shop work. Lacking that, I'd look for a vintage Campy or Sun Tour clamp-around-the-tube cable stop, clamp it above the existing brazed-on boss, and pretend the boss isn't there.
Unfortunately, and unlike some of my other hobbies, seems that few bicyclists are machine shop hobbyists, equipped to do their own machine shop work. Lacking that, I'd look for a vintage Campy or Sun Tour clamp-around-the-tube cable stop, clamp it above the existing brazed-on boss, and pretend the boss isn't there.
11-13-13, 10:57 AM
#20
Senior Member
Or just weld one of these to a 6mm bolt head, spin it on, and yer done!
https://www.cycle-frames.com/bicycle-...LAT-FRONT.html
Alternatively, drill a 6mm/8mm hole through the middle of this part and bolt it on.
Last edited by Drakonchik; 11-13-13 at 11:08 AM.
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11-13-13, 12:17 PM
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I saw on a site, don't recall if it was loosescrews.com, that carried a kit to bolt DT shifter bosses to a frame tube or stem.
It uses a long thru bolt. I'm sure the symmetric body could be modified or a machinist could mill a body to accept this kit.
It uses a long thru bolt. I'm sure the symmetric body could be modified or a machinist could mill a body to accept this kit.
11-13-13, 12:32 PM
#22
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https://www.cycle-frames.com/bicycle-...-AL-FRAME.html
Though that is interesting and loosely relevant, I'd submit that it would require excessive modification and machining to put it mildly. That kit is really intended for aluminum frame-building.
The downtube adapter that I make (4 photos posted above) is an off-the-shelf solution that would allow immediate downtube shifter installation without modification of the frame. My design works with off-round tubing such as tear-drop, oval, and early 1980s "aero" frames as well.
As it happens, I've got a Le Tour Luxe frame under my roof, so I can check the exact fit and report back later today.
11-13-13, 04:02 PM
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Shimano also made adapters for the B mount. See below.
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11-13-13, 06:57 PM
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I believe you're talking about this:
https://www.cycle-frames.com/bicycle-...-AL-FRAME.html
Though that is interesting and loosely relevant, I'd submit that it would require excessive modification and machining to put it mildly. That kit is really intended for aluminum frame-building.
The downtube adapter that I make (4 photos posted above) is an off-the-shelf solution that would allow immediate downtube shifter installation without modification of the frame. My design works with off-round tubing such as tear-drop, oval, and early 1980s "aero" frames as well.
As it happens, I've got a Le Tour Luxe frame under my roof, so I can check the exact fit and report back later today.
https://www.cycle-frames.com/bicycle-...-AL-FRAME.html
Though that is interesting and loosely relevant, I'd submit that it would require excessive modification and machining to put it mildly. That kit is really intended for aluminum frame-building.
The downtube adapter that I make (4 photos posted above) is an off-the-shelf solution that would allow immediate downtube shifter installation without modification of the frame. My design works with off-round tubing such as tear-drop, oval, and early 1980s "aero" frames as well.
As it happens, I've got a Le Tour Luxe frame under my roof, so I can check the exact fit and report back later today.
I'm not implying your offering isn't brilliant and potentially would resolve his mounting. Just that the OP insists on a solution to use the top boss. Which unfortunately requires effort and cost.
I like your mount! I remember bookmarking them for my own reference. Nice work.
11-13-13, 08:23 PM
#25
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I do not have the Symmetric shifters in front of me, but couldn't one just remove the levers from the base and use the protruding posts of the base to mount standard Shimano cable stops on them?
jim
jim
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