0hlins spring swap

Discussion in 'Parallel Universe' started by itsatdm, Jun 5, 2010.

  1. itsatdm

    itsatdm Long timer

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    Anybody swapped an Ohlins .55 spring into their F800gs forks?
    #1
  2. Indy Unlimited

    Indy Unlimited Long timer

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    I run Omni custom 0.60 kg springs in mine. I think most people should be using 0.55kg our 9" stroke forks to get 3" of loaded (rider & gear) sag.
    #2
  3. itsatdm

    itsatdm Long timer

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    Just thinking out loud here. The stock forks don't have much compression damping but the Bitubo's I am running do. Not a plush set up for sure. Maybe softer would help.



    Building a $1,000 suspension $100 bucks at a time.
    #3
  4. -W-

    -W- Flying Finn

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    I have, but my forks aren't anymore standart ones..

    http://www.advrider.com/forums/showpost.php?p=13078859&postcount=64

    They are bit longer than standardt springs - you should put shorter spacers to forks too (or cut the original ones). You can also use less preload than original forks have (they have too much to compensate soft springs).

    I think their stiffness is pretty good for this kind of bike. 990 Adventure has .48 (and that is a bit soft when riding hard/for heavy person even if it has good valving) and then Superenduro has .59 (and ofcourse a bit longer stroke also) which makes that a bit stiff, but that bike was designed to be ride really hard.

    Most of the aftermarket springs (excpecially progressive ones) are too stiff just to compensate poor valving of original forks (which you can't compensate with springs). I personally would buy 0.50 straight from Marzocchi (which is stiffest spring which they do for 45-serie forks) if I would be light person, then those Öhlins 0.55 if normal weight/riding harder and then Bitubo 0.60 if I would be heavy person and riding really hard (and all those are linear rate springs). But you need to have proper damping to do that..

    But that just me and my unprofessional opinion!:lol3


    Ps. How much Bitubo inserts & springs have preload as standart?
    #4
  5. itsatdm

    itsatdm Long timer

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    The Bitubo inserts come with a .62 spring. The insert has 15mm of preload adjustment. The cartridge is precharged and separate from the fork oil. No compression adjustment. The compression appears to be significant and the pressure in the cartridge applies quite a bit upward pressure on the damping rod which must add to the spring rate. Any how it works ok in rougher terrain and hard impact stuff, but not a plush set up.

    Not being a hard charger, I wouldl trade plush for occasional bottoming out.
    #5
  6. -W-

    -W- Flying Finn

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    So you can adjust preload 15mm externally, but how much they have preload internally when that external knob is set to minimum..?

    Öhlins 0.55 springs, or even Marzocchi's 0.50 (if you are light person) with internal preload set to about 10-18mm could work for you..
    #6