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how many different downtube shifter mount?

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how many different downtube shifter mount?

Old 11-05-20, 05:50 AM
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how many different downtube shifter mount?

Hi

Theres a big pile of bikes that the building management planning to toss away.

In this pile, I saw a steel roadbike frame with downtube shifter.
I assume the bike is low-end, due to the brand: Solar. The perfect beater inner-city bike build! It is attached with a drop handlebar with suicide levers.


The shifters look rusted and stuck.


what is the proper replacement shifter?

Last edited by mtb_addict; 11-05-20 at 10:49 AM.
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Old 11-05-20, 06:44 AM
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Low-end bikes typically have clamp-on shifters rather than brazed on mounts. If that's the case, replacement shifters must have a clamp suitable for the downtube diameter.

If it does have brazed on mounts, there are several types. The square-base "Campagnolo" type is probably the most common, but there are others. It's hard to say what will fit on your frame without seeing the actual mount.
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Old 11-05-20, 07:35 AM
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Originally Posted by JohnDThompson View Post
It's hard to say what will fit on your frame without seeing the actual mount.
I used a plier to twist the steel wire thingy, and it broke.

Looks like theres a allen nut on it. Can this shifter be refurbished? I will try to turn that allen nut tomorrow. Hope it dont strip.


Last edited by mtb_addict; 11-05-20 at 07:58 AM.
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Old 11-05-20, 09:53 AM
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Let me guess. You did not apply penetrant (Liquid Wrench, Kroil, Marvel Mystery Oil, etc.) before forcing the tensioning bolt on that shifter...


In the photo, does it have a flat slotted face? If so, penetrant first. Wait a day, then impact driver with flat bit. Voila.
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Old 11-05-20, 10:48 AM
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Originally Posted by Phil_gretz View Post
Let me guess. You did not apply penetrant (Liquid Wrench, Kroil, Marvel Mystery Oil, etc.) before forcing the tensioning bolt on that shifter...


In the photo, does it have a flat slotted face? If so, penetrant first. Wait a day, then impact driver with flat bit. Voila.
No slot. It has a hex...for allen wrench.

Last edited by mtb_addict; 11-05-20 at 10:52 AM.
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Old 11-05-20, 11:05 AM
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“Suicide shifters” are the stem mounted ones. Those there are downtube shifters.

PB Blaster or Sili-Kroil sprayed once or twice a day for 2-3 days should free those bolts up. You’ll likely need to do the same with the brakes, derailers, stem, cranks, and seatpost.

best wishes with the project!

Update with more pics when you can.
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Old 11-06-20, 04:52 PM
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You might also try asking on the Classic and Vintage subforum. There is a wealth of knowledge and experience there. And if you think that the regulars who post there (I'm one) are just a bunch of losers and deadbeats, well let me tell you that you're sorely mistaken, my friend.
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