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  1. #1
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    Lefty SL oil viscosity

    Hello everybody

    Does anyone know what is original oil weight or viscosity in the Lefty SL ?

    regards

  2. #2
    unemployed team mechanic
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    Golden Spectro 85/150

  3. #3
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    thanks

    compared to oil used in fox, it's generally 7,5 or 10 W
    what means 85 150 ? 85 W is for car's gearbox ??

  4. #4
    unemployed team mechanic
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    2.5 weight. golden spectro is measured differently.

  5. #5
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    2.5 ?!! it's almost water

    thanks for info

    did anyone try with heavier oil ?

  6. #6
    All Lefty's, all the time Moderator
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    AKA 85/125

    Thicker is great if you need a range of adjustment bump, due to a heavier spring.
    This is a Pugs not some carbon wannabee pretzel wagon!!

    - FrostyStruthers



    www.mendoncyclesmith.com

  7. #7
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    A tip I got from the pro motorcycle boys:
    You can mix your own to match your conditions - 50% 5wt + 50% 10wt = 7.5wt.
    Any good moto shop will carry a range of weights.

  8. #8
    Kanonkuglen.dk
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    Hi... check this previous thread out: How I made my Lefty SL run ultra smooth!
    Got the Cannondale fewer - my cycling blog: kanonkuglen.blogspot.com

  9. #9
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    thanks for info

    you say 10W, but wich oil factory ?

  10. #10
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    I'd steer clear of the SAE viscosity classifications since those are a range.
    Golden Spectro 85/150 is a 9cst to 16cst oil which is pretty heavy and equates to a Fox 1`10W.
    Also viscosity does not blend linearly so mixing 50% 5W + 50% 10W willl not give you 7.5wt but closer to 6.6wt..
    you also need to make some assumptions.

    Spectro has performed best in my Lefty's and I insist on only using that.

  11. #11
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    Thanks for the correction Brad

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