Not that this question hasn't been asked to death but I'm experiencing very poor shifting, here's my setup:

  • Shifters: ST-5700 (10-Speed Road)
  • Derailleur: M6000-SGS (10-Speed MTN)
  • Cassette: Sunrace CSMX3 11-42T (10-Speed MTN)
  • Adapter: Wolftooth Tanpan Inline 10-Speed (Mounted on cockpit)

My issues are shifting up into the middle ranges 18 - 24t, it's not very precise and I need to click the lever a little over. Then there's shifting down into the 11t which it struggles at times. Is there a way to solve this? I've tried mounting the tanpan on the derailleur, adjusting the barrel adjusters for better indexing but the shifting is never crisp and precise.

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    How old is the setup, especially cables? Using the tanpin, you are starting compromised, so everything else needs to be A Grade for a reliable setup. – mattnz Dec 3 '18 at 3:29
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    Does this setup work with MTB shifter? Your derailleur is designed for max. 36T cassette, 42T is quite far outside the spec. – ojs Dec 3 '18 at 12:15

Shifters: ST-5700 (10-Speed Road) and Derailleur: M6000-SGS (10-Speed MTN) will not work - the pull ratio is different. You need a 9-speed Shimano MTB derailleur. A 9-speed derailleur works directly with older Shimano 10-speed shifters, and shifting will be "normal". (IIRC, some of the newer 10-speed, sub-105-level shifters use a different pull ratio.)

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    This is true, but the OP uses a Wolftooth Tanpan, which is specifically designed to solve this incompatibility. – StefanS Dec 3 '18 at 12:10
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    @StefanS specifically designed to solve this incompatibility I was aiming more for others wanting to use a MTB derailleur with road shifters. Given the OP's stated issues, and especially given that a quick internet search indicates a Wolftooth Tanpan costs more than a decent 9-speed Shimano MTB derailleur alone, I think that's important. – Andrew Henle Dec 3 '18 at 13:09
  • I did not downvote your answer, but I still think you should add your comment into the answer. – StefanS Dec 3 '18 at 13:57
  • @StefanS Probably wouldn't matter. Finding out after the fact that a nine-speed rear derailleur that costs $35 would work better than a new $60+ 10-speed derailleur that also needs a $40 kludge/Rube Goldberg contraption isn't going to go over well. But hopefully this answer prevents someone else from going down this road. I'd rather be useful than brownnose points just to boost my ego. – Andrew Henle Dec 3 '18 at 14:35
  • As far as I know, there is no 9 speed derailleur that will work with a 42t cassette – Andy P Dec 3 '18 at 15:56

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