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85' Schwinn Peloton downtube shifters to brifter conversion help

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85' Schwinn Peloton downtube shifters to brifter conversion help

Old 08-11-14, 08:20 AM
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mkrotee
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85' Schwinn Peloton downtube shifters to brifter conversion help

Hi!

I have an old 85' Schwinn Peloton given to me by my father. I have been riding it for a year or two now and it is great.

I am interested in converting the down tube paddle shifters to brifters.

I'm not totally sure about compatibility between the parts.

It is a 2x6 speed. I don't think I can find 2x6 shifters anywhere so I was thinking for getting a 7 speed in the back. My rear derailleur is a suntour superbe.

What kind of shifters can I get to be compatible, what kind of cassette/freewheel do I need?

I'm assuming I could go to a 7 speed freewheel without any trouble, not sure what shifters I can get that would maybe work with my rear derailleur. Or would I need to go all Shimano with the shifters, freewheel, and RD?

I'm pretty new to all things bike parts so advice would be great, in what parts I need, etc.

Thanks!

Last edited by mkrotee; 08-11-14 at 08:28 AM.
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Old 08-11-14, 03:42 PM
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These should work with Shimano indexing derailleurs and a Shimano HG 7 speed freewheel.. You will also need some downtube cable stops to go where your downtube shifters are now.

https://www.amazon.com/Shimano-ST-A07.../dp/B007Q4MM1I
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Old 08-11-14, 04:23 PM
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You will also need a Shimano SIS RD and FD. And you will need either a Shimano 7 speed cassette or freewheel, depending what kind of wheel you have. Still very do-able.

Of course, try it with your Superbe parts first. They should not work, but they are bought and paid for, so try them. Realize working in part depends on your expectation for how smooth the shifting is. Certainly technically, the Suntour derailleurs should NOT work.

Last edited by wrk101; 08-11-14 at 04:26 PM.
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Old 08-12-14, 05:58 AM
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Originally Posted by vonfilm View Post
These should work with Shimano indexing derailleurs and a Shimano HG 7 speed freewheel.. You will also need some downtube cable stops to go where your downtube shifters are now.

https://www.amazon.com/Shimano-ST-A07.../dp/B007Q4MM1I
Can you provide links to derailleurs and free wheel that would be compatible please?
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Old 08-12-14, 06:21 AM
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Any Shimano 7 speed freewheel, or any Shimano compatible freewheel will work. Any Shimano RD that is SIS capable will work, other than early Dura Ace. The choices are endless. Several hundred at least. Then you have the question on gearing, that only you can answer. And finally, make sure you have a freewheel, and not a cassette. Regardless of the original specs for your bike, what is on there NOW may have no connection to what was on there originally. Owners have had 30 years to make changes.

When unsure about stuff like this, its really best to head to the bike shop of your choice, pay a little more, but make fewer mistakes. Don't let them keep your old stuff!!! It has value too! Either keep some of the old parts (derailleurs and levers), or sell them to help fund your project.
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Old 08-12-14, 07:51 AM
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Thanks!
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Old 08-12-14, 08:31 AM
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Have you considered non-indexed barcons? All you need are the shifters themselves, cables with housings, and a downtube mounted cable stop. This eliminates the biggest objection to downtube shifters -- taking a hand off the bars and reaching down to change gears.
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Old 08-12-14, 08:42 AM
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The cable stops might be a bit of a problem, too. The shifter bosses are the "Shimano B-Type" which were only available for a few years, and only work with a few types of Shimano shifters. But, you can modify normal cable stops to fit with a dremel tool and a file and some patience. You need to cut a slot and grind a circular cutout to fit over the boss tightly to the frame. Use the M4.5 bail screws from the shifters to hold on the cable stops- M4.5 screws are impossible to find.
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Old 08-12-14, 03:08 PM
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Originally Posted by John E View Post
Have you considered non-indexed barcons? All you need are the shifters themselves, cables with housings, and a downtube mounted cable stop. This eliminates the biggest objection to downtube shifters -- taking a hand off the bars and reaching down to change gears.
I have not, I'm more interested in the brifters.
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Old 08-12-14, 03:21 PM
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Originally Posted by cycle_maven View Post
The cable stops might be a bit of a problem, too. The shifter bosses are the "Shimano B-Type" which were only available for a few years, and only work with a few types of Shimano shifters. But, you can modify normal cable stops to fit with a dremel tool and a file and some patience. You need to cut a slot and grind a circular cutout to fit over the boss tightly to the frame. Use the M4.5 bail screws from the shifters to hold on the cable stops- M4.5 screws are impossible to find.
I'm not sure what any of this means since I am pretty new to bike parts and such.

Here is what I was thinking in parts, let me know if I am wrong or what I need.

Cable Stops: Robot Check

Brake Cables: The Brifter only comes with shifter cables
Robot Check

Shifters: (Shimano ST-A070 Road Shifters 2 x 7-Speed Black Pair)
Amazon.com : Shimano ST-A070 Road Shifters 2 x 7-Speed Black Pair : Bike Shifters And Parts : Sports & Outdoors

I'm also not sure if what I currently have is a freewheel or a cassette. What's the easiest way to figure that out?

Freewheel:Shimano MF-HG37 Tourney Freewheel (13-28T 7 Speed)

Robot Check

I'm also having trouble picking out a real derailleur, my current RD is a suntour superbe pro, so i'm assuming I need a shimano SIS RD. Would Shimano Tourney TX35 6/7-speed Rear Derailleur work, or should I get something better. Robot Check

my front derailleur is a shimano 105, shouldn't have to change this should I?
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Old 08-12-14, 06:32 PM
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Depends what era Shimano 105.
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Old 08-13-14, 06:13 PM
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Originally Posted by wrk101 View Post
Depends what era Shimano 105.
Not sure, 80's or 90's
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Old 08-13-14, 06:19 PM
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Originally Posted by mkrotee View Post
Not sure, 80's or 90's
Check the model number on the back, or the date code. It matters.
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Old 08-13-14, 07:21 PM
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Originally Posted by wrk101 View Post
check the model number on the back, or the date code. It matters.
fd-1056
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