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Rear Derailleur suggestions?

Old 12-03-17, 05:59 PM
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KaisoArt
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Rear Derailleur suggestions?

I do not want to start SRAM/Shimano flame war, I'm just hoping to get some useful info. My last build was several years ago and I used a SRAM X9 as it worked with my black and red scheme. That derailleur is not longer made.

What I'm looking for is a robust, durable, 10 speed, derailleur, that can handle touring, and will be compatible with either Dura-Ace or TT900 barend shifters, and my SLK Light triple up front.

The machine I'll be getting comes with a X4 rear derailleur. I want to replace it with a durable 10-Speed long cage unit. I'm not biased either way between SRAM/Shimano. (In previous builds, I chose based on how they worked with my color scheme.) When I'm finished, it will be used for loaded touring.

I really don't know the current component levels SLX, XT, GX, etc, and how they relate to my needs. Any info would be appreciated.
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Old 12-03-17, 09:23 PM
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Originally Posted by KaisoArt View Post
I do not want to start SRAM/Shimano flame war, I'm just hoping to get some useful info. My last build was several years ago and I used a SRAM X9 as it worked with my black and red scheme. That derailleur is not longer made.

What I'm looking for is a robust, durable, 10 speed, derailleur, that can handle touring, and will be compatible with either Dura-Ace or TT900 barend shifters, and my SLK Light triple up front.

The machine I'll be getting comes with a X4 rear derailleur. I want to replace it with a durable 10-Speed long cage unit. I'm not biased either way between SRAM/Shimano. (In previous builds, I chose based on how they worked with my color scheme.) When I'm finished, it will be used for loaded touring.

I really don't know the current component levels SLX, XT, GX, etc, and how they relate to my needs. Any info would be appreciated.

Excluding normal wear rates all rear ders are going to have issues if banged on. So the real durability aspects are controlled by the rider. I don't see even a few ders that spontaneous break apart, twist, bend or otherwise fail without some failure in their maintenance, set up or suffering an incident.


Still having said that the "nicer" ders will feel more solid in their shifting and this is the big reason to use them.


The rear der has no bearing on the ft der. Now what shifters you use does.


As the cost of ders go up there are nicer materials used and they are formed by more controlled processes. So a nicer unit will have less slop in the pivots or less but stronger material or lighter materials (as examples).


I would first focus on the shifters then work the rest of the drivetrain WRT the shifters compatible limits.


I will add that the more cogs one has on the rear the more sensitive to adjustment, maintenance and such the system will be. The wider cog to cog spacing of 9 speed cassettes allows for more slop in the tuning/condition then a 10 speed system will. This is one reason that mountain bikes have lagged behind the road crowd in the cog count. If your touring will see long periods of no maintenance or cover a lot of unimproved "roads" then your touring is much like off road mountain biking in how the drivetrain wears and collects grit/grime.


On a loaded touring bike I would be more concerned about wheel robustness then that of the ders. Andy
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Old 12-03-17, 11:45 PM
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SRAM Shifters? Sram Derailleurs, Period.

Shimano and Sram don't play well together.

punch "SRAM long cage MTB" into EBay's search... shop away... (pssst... there's a good used X9 on there right now...)
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Old 12-04-17, 12:10 PM
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Originally Posted by Andrew R Stewart View Post

So a nicer unit will have less slop in the pivots or less but stronger material or lighter materials (as examples).
This is what I want info on. A few grams extra on a RD has no effect on a loaded bike. However, quality robust pivots and bearing will. I have both the Dura-Ace and SRAM TT900 barend shifters. If mixing is problematic as suggested in the other post, my Der choice will dictate which shifters I use. I know X9. Which Shimano is the same level?
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Old 12-04-17, 01:05 PM
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Look for a derailleur guard? often used on kids bikes since they are more likely to just drop the bike on the right side..
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