150mm reverb stealth on a medium Insurgent???- Mtbr.com
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  1. #1
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    150mm reverb stealth on a medium Insurgent???

    Anyone know if you can slam a 150mm Stealth all the way down to the seat tube collar on a medium Insurgent? Trying to get that last bit of seat out of the way. Got about 25mm of tube to go so the 150mm would be perfect with the right climbing room in extension. Just don't know if there's room with the attachment in the frame.

    Any other ideas/thoughts appreciated. It's funny, this bike makes me ride more input and aggression than I ever have. I think that's why my seat height started bugging me.

  2. #2
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    Highly doubt it.

    EVIL Insurgent - Booyah!!! - Page 7- Mtbr.com

    According to this post, the max insertion on the M frame is around 8 inches. When you move to a 150mm dropper, you have to remember that the bottom part of the seat post also becomes longer make room for the bigger drop. My guess is you'll end up with *more* than 25mm exposed, not less.

  3. #3
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    Thanks for that. So really it just means an inch more exposed seat post when dropped at it's lowest possible set up.

    125mm dropper: (Total length 390mm) - (drop 125mm) = 265mm - 8" max insertion = 2&3/8" exposed seat post when dropped.
    150mm dropper: (Total length 440mm) - (drop 150mm) = 290mm - 8" max insertion = 3&3/8" exposed seat post when dropped.

    Looks like it's time to shop for a shorter overall length dropper. Or got external routing.

  4. #4
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    Quote Originally Posted by BossLog View Post
    Thanks for that. So really it just means an inch more exposed seat post when dropped at it's lowest possible set up.

    125mm dropper: (Total length 390mm) - (drop 125mm) = 265mm - 8" max insertion = 2&3/8" exposed seat post when dropped.
    150mm dropper: (Total length 440mm) - (drop 150mm) = 290mm - 8" max insertion = 3&3/8" exposed seat post when dropped.

    Looks like it's time to shop for a shorter overall length dropper. Or got external routing.
    Try a KS Lev integra. The total length for the 150mm drop is 442mm.

    BUT - that includes 29mm of cable actuation mechanism at the bottom, which is much smaller than the rest of the post/ can sit past the bend on the seat tube. So you can assume the length is around 415mm in your calculations.

    Another option is to look for a saddle with a lower height (top of saddle to bottom of rails) - might buy you another 5 to 10mm depending on your current saddle.

  5. #5
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    You might be able to get away with a 170mm dropper like the 9Point8. I'm 5'-8" with a 30" inseam and currently own a 150mm 9.8 so like you I'm trying to figure out a way to drop my seat all the way down without having to manually lower it and think there is enough room to do this.

  6. #6
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    Quote Originally Posted by GFreak View Post
    You might be able to get away with a 170mm dropper like the 9Point8. I'm 5'-8" with a 30" inseam and currently own a 150mm 9.8 so like you I'm trying to figure out a way to drop my seat all the way down without having to manually lower it and think there is enough room to do this.
    Again.. highly doubt this will work. The 150mm drop 9point8 is 440mm, but the 175mm drop is 500mm! So to get an extra inch of drop, you add almost 2.5 inches to the length of the seat post.

    Measure 19 3/4 inches from the bend in the seat tube. That's where the bottom of the saddle rails will end up.

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