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Vintage Clamp-On Shifter boss for Modern levers?

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Vintage Clamp-On Shifter boss for Modern levers?

Old 09-26-17, 01:55 PM
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Vintage Clamp-On Shifter boss for Modern levers?

I want to put DT 7900 levers on my Trek 710 and I don't like the modern Problem Solver / Origin 8 solution. Is there a vintage clamp-on band that will fit modern indexed levers?
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Old 09-26-17, 03:06 PM
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I'm in the same boat.

I picked up a pair of these.

It seems like you could remove the 6-sp shifters and replace them.

I haven't tried this, but plan on doing so with some 8sp shifters.

EDIT: I did this and it worked great! I now have 8-speed, clamp-on indexed shifting.

At $15 shipped and much better looks it seems like a no-brainer. Note: I bought a pair and as stated in the listing, it doesn't included the pinch bolt. It did come with two shifter cables. Quality is good.

Last edited by thinktubes; 10-08-17 at 11:40 AM.
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Old 09-26-17, 03:40 PM
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These are another option, and turn up pretty regularly on eBay. They'll accept any lever that mounts on a standard Campagnolo-type lever boss. Just be careful to get the clamp size for a 1-1/8" diameter tube rather than the 1" diameter tube.



Huret Dual Shift Lever Vintage New Old Stock / France / Road Bike / Racing
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Old 09-26-17, 05:52 PM
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I think from at least the early 80's on there is pretty broad compatibility between downtube shifter bosses, and therefore between clamp-on adapters. Shimano made some bosses early on that aren't compatible with anything else and I'm suspicious of those Huret clamp-on adapters because the studs are round. I think you need something with flat edges. Somebody used to sell Huret adapters that were specifically modified for Shimano compatibility, but they may all be gone now.

I know for sure that clamp from the Shimano indexed levers that thinktubes linked to will work for you. I've bought a set of those shifters for a very similar purpose. For whatever reason, it's usually cheaper on eBay to buy a clamp with shifters attached than just the clamp.
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Old 09-26-17, 05:59 PM
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Originally Posted by Andy_K View Post
For whatever reason, it's usually cheaper on eBay to buy a clamp with shifters attached than just the clamp.
Yeah- I bought a set of NOS 6400 shifters on a clamp for like $20. No one else was interested in them at the time.
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Old 09-26-17, 07:28 PM
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Originally Posted by thinktubes View Post
I'm in the same boat.

I picked up a pair of these.

It seems like you could remove the 6-sp shifters and replace them.
That's what I did for the clamp on boss for my PX10 rebuild. They come with the standard Shimano concave washer spacer things, so you can put whatever speed shimano shifters on there. Mine did come with a pinch bolt.

In retrospect I might have preferred the modded Huret clamp on shifter mounts that guy on ebay sells. Frankly I hate clamp ons though, and I may mod the frame at some point.
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Old 09-26-17, 10:23 PM
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I clicked on the Huret bosses. If I get impatient this weekend, I'll go by Bill Ron's and see if he has a Shimano model. I think the squared off portion is for Campagnolo.
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Old 10-01-17, 08:55 AM
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My Huret Bosses arrived and they look great. However, the threads are not normal. I hope a trip to the hardware store can remedy that.
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Old 10-01-17, 09:24 AM
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You need to run a tap through them.
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Old 10-01-17, 11:15 AM
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Thanks for the link Slash5.
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Old 10-01-17, 12:43 PM
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Found this Suntour at the local co-op. It required a bit of grinding.
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