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  1. #1
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    A few question about fork and brake setup...

    I just got my new bike (check my thread ) and its nice and all however I have a few question about fork (RockShox Tora 318) and brakes (BB5) setup.

    1. What are the pros/cons of a higher/lower preload and faster/slower rebound? I'm not sure how I should have each.

    2. As far as brake lever feel go... is there a "right" setup or should you just go with whatever fits you? The brakes felt spongy and underpowered, I used the inner pad knob to bring the pad closer and they felt tighter and obviously more powerful and for me better but maybe there was a reason my LBS set them up like that, ??

    The more you can contribute the better, thanks in advance.

  2. #2
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    hmm, bump?

  3. #3
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by Chone
    I just got my new bike (check my thread ) and its nice and all however I have a few question about fork (RockShox Tora 318) and brakes (BB5) setup.

    1. What are the pros/cons of a higher/lower preload and faster/slower rebound? I'm not sure how I should have each.

    2. As far as brake lever feel go... is there a "right" setup or should you just go with whatever fits you? The brakes felt spongy and underpowered, I used the inner pad knob to bring the pad closer and they felt tighter and obviously more powerful and for me better but maybe there was a reason my LBS set them up like that, ??

    The more you can contribute the better, thanks in advance.
    **corrected**
    since no one jumped in, i will attempt a short answer:

    1) really no right or wrong, its what you like. couple general rules.

    rebound:
    • fast- fork extends faster to meet demand of next bump in succession. depending on terrain, less R dampening/ faster R could offer a better ride (i.e. small stutter bumps). lack of dampening, forks could feel too springy...maybe cause washing out in turns (not settling) and deflection.
    • slow- lots of R dampening/ slow R the fork could "pack" up and not have the necessary travel to absorb a sudden larger hit. maybe a harsh bottoming as a result. also tendency for fork "to hang out" in harsh range of travel yielding poor ride quality.


    preload:
    • too much preload- generally not good. in conditions "between" static (you sitting on bike) and near weight-less conditions from terrain, you want the fork to have some "play" to be able extend and follow contour of ground. no pre-load and the moment you "transition" to weightless states, if you will, your front wheel will simply want to leave the ground less control...
    • no preload- waste of travel...altered frame geometry, harsher range of stroke, etc...


    both parameters will also alter frame geometry as well. preload more in a static state and rebound in a dynamic state. the effective head angle can be altered making for a more stable ride or twitchy ride.


    suspension tuning is sort of like weight training. so many variables. as long as you can justify to someone why the heck you're doing what you are doing using the basic "proven" theories, you really cannot go wrong.

    right Gastro?


    anyone can chime in and correct the above!
    Last edited by mx_599; 05-03-06 at 06:38 PM.

  4. #4
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by Chone
    2. As far as brake lever feel go... is there a "right" setup or should you just go with whatever fits you? The brakes felt spongy and underpowered, I used the inner pad knob to bring the pad closer and they felt tighter and obviously more powerful and for me better but maybe there was a reason my LBS set them up like that, ??

    The more you can contribute the better, thanks in advance.
    oops...brakes.

    uhhh, yeah. i am going to defer this one to Gastro.

  5. #5
    Lost in the Black Hills mx_599's Avatar
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    to OP. not too familiar with your fork, but i don't suspect it is THAT sensitive to adj. not sure about that though. i pretty much just ride my forks and don't stress over the settings too much. it is my general opinion that unless you have top of the line ones, they are not very receptive to adj...at least none of my low-mid ones. i have barely messed with my REBA. for me, not much to do with 4 inches of travel on one end. as long as it goes up and down i am happy.

    however, here is a quick list of factors affecting MX suspension:

    forks
    ~12" travel
    compression (20+clicks)
    rebound (20+clicks)
    spring rates
    fork oil height/viscosity
    fork leg height in triple clamp
    head bearing preload and/or steering dampener

    shock
    ~12" travel
    compression (20+clicks)
    rebound (20+clicks)
    high speed compression (2 turns)
    spring rates
    spring preload/ race sag
    wheel base


    now intermix all that and you can see the incredible amount of combos possible!! not trying to brag, point is this, it is kind of hard for me to get too excited about adjusting a hard tail with 4 inches of travel in a mid level fork. just ride!!!

    i would imagine the MTBers with full suspension and nice quality stuff come much closer to what i mentioned above

  6. #6
    Senior Member nodnerb's Avatar
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    12" of travel?

  7. #7
    one less horse cryptid01's Avatar
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    Quote Originally Posted by mx_599
    dampening



    Quote Originally Posted by mx_599

    preload:
    [*]no preload- generally not good. in conditions "between" static (you sitting on bike) and near weight-less conditions from terrain, you want the fork to have some "play" to be able extend and follow contour of ground. no pre-load and the moment you "transition" to weightless states, if you will, your front wheel will simply want to leave the ground less control...
    [*]too much preload- waste of travel...altered frame geometry, harsher range of stroke, etc...


    <snip>

    right Gastro?
    Replace "preload" with "sag" and you're right on. (Preload on the spring controls the amount of sag.)

  8. #8
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by gastro

    Replace "preload" with "sag" and you're right on. (Preload on the spring controls the amount of sag.)
    dampening
    dampening
    dampening
    dampening


    oops, yeah you're right as i wrote it above i should have put sag. i was trying to use the OP terminology when in reality, deep down inside, i wanted to say sag

    i fixed it now...thanks for being the editor-in-chief
    Last edited by mx_599; 05-03-06 at 06:39 PM.

  9. #9
    Lost in the Black Hills mx_599's Avatar
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    chone....just adjust your brakes so they feel good. i am sure you will be fine with the way they are.

  10. #10
    Flatland hack Flak's Avatar
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    I didnt notice alot of change from the knobs on mine chone. But im used to riding rigid so this whole fork thing is odd to me.

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