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  1. #1
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    What chain guide for 2010 S-Works Stumpjumper Carbon?

    Hi, I've been running a 2010 S-Works Stumpjumper Carbon for several months now and the chain has been hopping off constantly, it's driving me nuts. It's sometimes when shifting to higher gears, but also sometimes at random. I assume the previous owner converted it to 1x10, because I don't believe it comes this way stock. I figure that the easiest solution for me is to install a chain guide. The problem is that I don't see any of the common mounting holes available on the frame (FACT 10m): ISCG, hi/low direct mount. I don't know about BB mount. That leaves seat tube mount, but the tube is rounded rectangular and all the tube mount chain guides appear to be designed for round tube. There are a couple threaded holes in the area but these attach to the rear triangle which moves with the suspension, and I doubt these can be used with the listed standards. Any suggestions? Photo attached. Thanks.

    What chain guide for 2010 S-Works Stumpjumper Carbon?-20170508_202405.jpg

  2. #2
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    If you've got a clutch derailleur then get a narrow wide front ring? Plenty of people are getting great chain retention without a guide now.

  3. #3
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    Thanks for the suggestion, I will try this. Go figure, the size I need to hard to find... 120mm BCD, 4-hole, 38t narrow-wide. I'd be willing to go to fewer teeth, but pretty much can't find anything.

  4. #4
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    Turns out my rear derailleur (XX from 2010) does not have a clutch (see photo), since I can push the bottom part all the way forward. I will try the narrow-wide chainring anyway. I did find one option that I think will fit, so I will try this:

    https://www.wolftoothcomponents.com/...bcd-chainrings

    https://www.amazon.com/Components-12...cd+narrow-wide

    What chain guide for 2010 S-Works Stumpjumper Carbon?-20170509_214043.jpg

  5. #5
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    Happy to report that, though expensive, the wolf tooth narrow-wide front ring has stopped 99% of the derailments. Thanks again for the suggestion.

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