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10 speed indexed DT shifter with an XT RD?

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10 speed indexed DT shifter with an XT RD?

Old 03-10-18, 11:00 PM
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tyrion
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10 speed indexed DT shifter with an XT RD?

Is this straightforward, would it be rock solid clickie indexing with a Dura Ace down tube shifter? (I know I'll have to put an adjuster in the RD cable somehow.)

I need to replace cables soon anyway and I was thinking of trying this out.

I'd keep the bar end shifters on hand so I can always go back to them.
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Old 03-10-18, 11:10 PM
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Why wouldn't it be rock solid clickie shifting? I did the same thing a few years ago before 10sp were common. 9sp Dura Ace DT with 105 RD. Cable adjuster is where they usually are, at the derailleur hanger. You don't really need two, mostly the only one anyone ever adjusts is the one at the derailleur itself.
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Old 03-10-18, 11:16 PM
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Originally Posted by Leisesturm View Post
Why wouldn't it be rock solid clickie shifting?
I don't know. Maybe they don't work with Shimano mountain 10 speed RDs?
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Old 03-10-18, 11:23 PM
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https://www.bikeradar.com/us/gear/ar...illeurs-48460/


"And just for clarity, current generation Shimano road and mountain bike components are not inter-compatible with each other as they use different cable pull ratios. For example, you couldn’t use a set of road shifters with a mountain bike rear derailleur."

Last edited by Leisesturm; 03-10-18 at 11:26 PM.
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Old 03-11-18, 12:04 AM
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Originally Posted by Leisesturm View Post
https://www.bikeradar.com/us/gear/ar...illeurs-48460/


"And just for clarity, current generation Shimano road and mountain bike components are not inter-compatible with each other as they use different cable pull ratios. For example, you couldn’t use a set of road shifters with a mountain bike rear derailleur."
Ok thanks. So much for that idea.

(I just skimmed that page and it looks like 9 speed gives you more options and interoperability. I'm not going to switch over to 9 speed but I can see why people recommend it.)
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Old 03-11-18, 12:11 AM
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Originally Posted by Leisesturm View Post
Cable adjuster is where they usually are, at the derailleur hanger. You don't really need two, mostly the only one anyone ever adjusts is the one at the derailleur itself.
No adjuster on XT

Originally Posted by tyrion View Post
I don't know. Maybe they don't work with Shimano mountain 10 speed RDs?
You can use an XT with D/A d/t shifters, but you want to purchase a pre-Dyna-Sys derailleur (which would mean an 8/9sp model marketed before the 10sp group was introduced c2010). Your d/t shifters won't pull enough cable to operate a 10sp XT RD. Also remember that some were "rapid rise" models which are good but you may not like. The M771 is probably what you're talking about, or the Deore M591 if you want a good RD but want to save some money.

If you're not familiar with the 10sp d/t shifters: 7800 series offers the option of friction shifting; 7900 series is indexed only.
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Old 03-11-18, 12:47 AM
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There is the Wolftooth Tanpan that should covert from 10s road to 10s MTB.

I'm not sure why the 10s is only listed as "inline", but perhaps it is adaptable. Or, the NOS standard versions would be available.

Microshift makes 10s and 11s bar end shifters for MTB derailleurs.
BS-M10 MicroSHIFT 10S "Mega" MTB bar end shifter
BS-M11 MicroSHIFT 11S "Mega" MTB bar end shifter

SL-M10 MicroSHIFT 10S "Mega" MTB thumb shifter
SL-M11 MicroSHIFT 11S "Mega" MTB thumb shifter

I would think the thumb or bar end shifters likely could be adapted for use as downtube shifters, although one might lose the cable guides.

Also keep in mind that Shimano has stopped providing an inline adjuster with some of their MTB derailleurs, which can be problematic for fine tuning road installs and indexing. The Tanpan above does come with the inline adjuster.
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Old 03-11-18, 12:51 AM
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Oh, I've been friction shifting 9s (DT) for quite some time with quite good success.

I started friction shifting 11s using a MTB 11s rear derailleur and vintage bar end shifters. I still have some fine tuning to do with range, but finding gears works well.

The big issue is that the 10s and 11s MTB derailleurs require more cable pull than the older derailleurs. Thus, vintage shifters can have issues with not pulling enough cable.
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Old 03-11-18, 11:16 AM
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[QUOTE=CliffordK;20216010]
BS-M10 MicroSHIFT 10S "Mega" MTB bar end shifter

That's what I have now. It's about time for new cables and I thought I'd try DT shifters, but not if it's going to require something like that Tanpan adapter.
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Old 03-11-18, 11:23 AM
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A good article with useful information about compatibility:

Art's Cyclery Blog » Science Behind the Magic | Drivetrain Compatibility

It's my go to when there are any questions like this, the charts cover almost everything (more modern stuff of course).
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