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  1. #1
    has training wheels
    Reputation: DeltaNu1142's Avatar
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    Spec Stumpjumper FSR 29er 1x9 - jump stop size?

    I'm not home & trying to figure out what size jump stop I need to for the front sprocket; I don't know what size the tube is. Can anyone help, or point me to something they've used?

    ...this is my bike, but I've configured as a 1x9. LINK

    Thanks!
    2009 Stumpy 29er 1x9 Frankenbike

  2. #2
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    Reputation: boomn's Avatar
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    The Jump Stop should be whatever size your front derailleur clamp was, but since that bike didn't use a clamp-on front derailleur you'll have to measure the seat tube yourself. Is the seat tube round in the area across from the top of your middle ring?

  3. #3
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    are you talking about the N-Gear jump stop? I would not recommend it on a full suspension bike based on my experience.....it just didn't work for me.....for hard-tails the jump stop works fine....

  4. #4
    human dehumidifier
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    The N-gear webpage describes how to estimate what size you need if you don't have a derailleur for reference N-Gear: Specs and Order Info.

    Nevermind .. just noticed in your post that you're not with the bike.
    Last edited by wv_bob; 09-22-2011 at 09:35 AM.
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  5. #5
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    Quote Originally Posted by osmarandsara View Post
    are you talking about the N-Gear jump stop? I would not recommend it on a full suspension bike based on my experience.....it just didn't work for me.....for hard-tails the jump stop works fine....

    id have to agree, something like an e13 xcx guide would be better.

  6. #6
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    Quote Originally Posted by b-kul View Post
    id have to agree, something like an e13 xcx guide would be better.
    love the simple sets for 1x9- I have set these up on a Nomad and an Intense 6.6 and had pretty good results- not great. These types of set ups work best on hard tails or cross bikes- just too many moving parts.

  7. #7
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    Reputation: DeltaNu1142's Avatar
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    Thanks guys. The E13 XCX looks like what I need. I'll take a look later, but I had the impression that the tube is oval at that point, so I would need a BB-mounted solution like the XCX.
    2009 Stumpy 29er 1x9 Frankenbike

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