Is the Sturgis/NightTrain Too Slack with 120mm Bluto?- Mtbr.com
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  1. #1
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    Is the Sturgis/NightTrain Too Slack with 120mm Bluto?

    The reason I ask is because I received mine with a 100mm Bluto.

    Is it going to get slack and flip-floppy at low speed (which is where it will spend most of its time while in the snow) if I demand they send me a 120 Bluto, or am I better off keeping the 100? The 100 feels pretty good at least around the shop. Kind of that "edge of floppy" without being floppy.

    Thanks!

    -F


    ************************************************** *************************************
    EDIT: I released the air from the lower air chamber and the fork popped right up to 120mm! I thought that trapped air only happened when the fork was run in sub-zero temperatures, which I hoped would not be an issue with a new fork.

    More interesting to me is that it felt like it functioned perfectly fine with air in the lower chamber at 100mm of travel, so now I want to figure out how to adjust the travel just by admitting air to the lower. This would make this fork very adaptable!
    Last edited by Fleas; 03-05-2015 at 09:42 PM.
    It's never easier - you just go faster.

  2. #2
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    Bueller?


    ...Bueller?


    -F
    It's never easier - you just go faster.

  3. #3
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    No its not.

  4. #4
    djrez4
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    There's only one Bluto. Travel is adjusted by adding or removing bottomless tokens. So, if you want a 120mm Bluto, remove the tokens and try it. If it gets too "floppy," put them back in.

    See here.

  5. #5
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    Quote Originally Posted by djrez4 View Post
    There's only one Bluto. Travel is adjusted by adding or removing bottomless tokens. So, if you want a 120mm Bluto, remove the tokens and try it. If it gets too "floppy," put them back in.

    See here.

    This is not totally true, yes all Blutos can be converted but not by changing the bottomless tokens it's by swapping out the proper air shaft for the desired travel length. The bottomless tokens affect how the fork ramps up through the travel.

  6. #6
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    Quote Originally Posted by bdundee View Post
    This is not totally true, yes all Blutos can be converted but not by changing the bottomless tokens it's by swapping out the proper air shaft for the desired travel length. The bottomless tokens affect how the fork ramps up through the travel.
    I do not know where the idea that bottomless tokens adjust travel came from. RockShox needs to reduce the confusion with some of their products. This is 2 times in 2 forks that the seller did not know what they were selling. One was a Reba from Bluesky that only went to 110 by removing a spacer instead of 120. Now I get a Bluto from Bikesdirect that even says 120 on it, but it is 100. And even the customer service people were promoting this false idea that tokens are for travel.
    The air shaft sets the travel.

    So I got one "no" vote so far...

    -F
    It's never easier - you just go faster.

  7. #7
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    I am going to set mine up 100mm. I think it is a little weavey at low speeds Set at 120mm.
    2013 Specialized Camber Comp
    Motobecane Sturgis Bullet (Arrived 11/6/14)

  8. #8
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    Quote Originally Posted by Fleas View Post
    Now I get a Bluto from Bikesdirect that even says 120 on it, but it is 100.



    -F
    Sounds like a silly question but are you sure there isn't to much air in the negative side causing it to suck down some and looking like it's a 100?

  9. #9
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    Is the Sturgis/NightTrain Too Slack with 120mm Bluto?

    Quote Originally Posted by mtb_fun View Post
    I am going to set mine up 100mm. I think it is a little weavey at low speeds Set at 120mm.
    What are you using to convert it to 100? Can you provide a link to the proper AIT shaft you will buy to change it to 100?

  10. #10
    djrez4
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    My bad. I misinterpreted the Rockshox docs.

  11. #11
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    Quote Originally Posted by bdundee View Post
    Sounds like a silly question but are you sure there isn't to much air in the negative side causing it to suck down some and looking like it's a 100?
    This is a solo air fork.
    When I saw it, I let all the air out, extended and compressed it, then repressurized.
    It still looks like this:
    Is the Sturgis/NightTrain Too Slack with 120mm Bluto?-20150304_175559.jpg

    Quote Originally Posted by Negotiator50 View Post
    What are you using to convert it to 100? Can you provide a link to the proper AIT shaft you will buy to change it to 100?
    I saw them at Universal Cycles.

    -F
    It's never easier - you just go faster.

  12. #12
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    Quote Originally Posted by Negotiator50 View Post
    What are you using to convert it to 100? Can you provide a link to the proper AIT shaft you will buy to change it to 100?
    This is where I got mine.


    http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
    2013 Specialized Camber Comp
    Motobecane Sturgis Bullet (Arrived 11/6/14)

  13. #13
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    Quote Originally Posted by Fleas View Post
    This is a solo air fork.
    When I saw it, I let all the air out, extended and compressed it, then repressurized.
    It still looks like this:
    Click image for larger version. 

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    I saw them at Universal Cycles.

    -F
    Yes it is listed as a solo air but technically it's not. There is an orifice that lets the air down to the lower portion and sometimes it doesn't equalize right and sucks the fork down. There is a air valve to release said pressure under the 8mm bolt under on the bottom of the leg on the air side. I really doubt this is your problem but it does happen with these forks.

  14. #14
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    Quote Originally Posted by bdundee View Post
    Yes it is listed as a solo air but technically it's not. There is an orifice that lets the air down to the lower portion and sometimes it doesn't equalize right and sucks the fork down. There is a air valve to release said pressure under the 8mm bolt under on the bottom of the leg on the air side. I really doubt this is your problem but it does happen with these forks.
    I thought I had read something about that in one of the Bluto threads. Does RockShox offer any troubleshooting advice about that? I didn't see anything in the manual.

    Seeing that mine is exactly at 100mm on the sag indicator suggests, as you said, that it is not entrapped air.

    Thanks for the feedback.

    -F
    It's never easier - you just go faster.

  15. #15
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    Important edit in OP.

    -F
    It's never easier - you just go faster.

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