Substitute for Fox 10wt Green?- Mtbr.com
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  1. #1
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    Substitute for Fox 10wt Green?

    Trying to rebuild my 2008ish Fox float 140mm RL fork and it calls for fox 10wt green fluid, but it appears that was discontinued. What are people using as a substitute?
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  2. #2
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    WPL 10wt

  3. #3
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    For oil bath or damper fluid? For oil bath, you can use just about anything, like 0W30 motoroil.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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    I think the fork is an open bath style, but Fox calls for Fox green 10wt on both sides.
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  5. #5
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    Quote Originally Posted by alexk243 View Post
    I think the fork is an open bath style, but Fox calls for Fox green 10wt on both sides.
    I was only referring to semi-bath design, more recent fox forks with closed cartridges. If its full-open bath, then you need actual damping fluid for sure.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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  6. #6
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    Quote Originally Posted by Jayem View Post
    I was only referring to semi-bath design, more recent fox forks with closed cartridges. If its full-open bath, then you need actual damping fluid for sure.
    Right, So what would work in the place of Fox Green 10wt?

    Would any of these work:

    Fox Red 10wt - https://amzn.to/30MFCpt

    Maxima 10wt - https://amzn.to/2AJRqhR

    BelRay 10wt - https://amzn.to/31RaBSD
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  7. #7
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    Quote Originally Posted by alexk243 View Post
    Right, So what would work in the place of Fox Green 10wt?

    Would any of these work:

    Fox Red 10wt - https://amzn.to/30MFCpt

    Maxima 10wt - https://amzn.to/2AJRqhR

    BelRay 10wt - https://amzn.to/31RaBSD
    Find out the CST of the fox fluid and then check a CST chart, like PVD designs. Thatís how find equivalent fluid weights.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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  8. #8
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    I believe the following chart indicates 10W Red.

    https://www.ridefox.com/fox17/help.php?m=bike&id=530
    Do the math.

  9. #9
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    Quote Originally Posted by alexk243 View Post
    Trying to rebuild my 2008ish Fox float 140mm RL fork and it calls for fox 10wt green fluid, but it appears that was discontinued. What are people using as a substitute?
    Here's the interesting part. Your fork never came with 10wt oil inside. It had a 7wt oil which is actually 32 cSt. 10wt is a lot thicker and will slow the fork a lot. Especially in the cold and over sharper bumps.

    We use Motorex 7.5wt (35 cSt) and it works great. It is a lot more slippery than the original oils.

    I have no idea why Fox were recommending 10wt (47 cSt) oils as retrofit for their forks and shocks because they never used those oils themselves. I have measured the viscosity of oils from dozens of Fox forks and shocks over the years and have never found 10wt from the factory.

    They are still using 32 cSt oil (aka 7wt).
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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