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  1. #1
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    Mavic Freehub Binding?

    I have a Mavic Aksium wheel that will spin alright when chain is on smaller cogs but seems to not spin as free when the chain is on larger cogs. is this normal for a low end set or something is binding somewhere? thanks in advance.

  2. #2
    changingleaf
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    This doesn't look normal. Are you spinning the crack backwards or coasting? If you are spinning the cranks backwards and cross-chaining there is slightly more friction than when the chain is straight. There should be no noticeable difference coasting.

  3. #3
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    Quote Originally Posted by IP Outdoors View Post
    I have a Mavic Aksium wheel that will spin alright when chain is on smaller cogs but seems to not spin as free when the chain is on larger cogs. is this normal for a low end set or something is binding somewhere? thanks in advance.
    Long story short, this is the primary symptom a Mavic cassette that needs service. It is reasonably simple for the home mechanic to do, and if you own a set of Mavic wheels then you'll want to become familiar with this. Also, be VERY aware that the pawl springs will want to jump across the universe give their first chance to do it.

    This article is a good breakdown of what you need to do.
    Last edited by November Dave; 01-04-2018 at 10:04 AM.

  4. #4
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    Quote Originally Posted by changingleaf View Post
    This doesn't look normal. Are you spinning the crack backwards or coasting? If you are spinning the cranks backwards and cross-chaining there is slightly more friction than when the chain is straight. There should be no noticeable difference coasting.
    coasting. its a new wheel.

  5. #5
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    Quote Originally Posted by November Dave View Post
    Long story short, this is the primary symptom a Mavic cassette that needs service. It is reasonably simple for the home mechanic to do, and if you own a set of Mavic wheels then you'll want to become familiar with this. Also, be VERY aware that the pawl springs will want to jump across the universe give their first chance to do it.

    This article is a good breakdown of what you need to do.
    I have taken it apart and inspected. looks fine. its a rather new wheel with less than 50 miles. I relubed with food grade mineral oil from the kitchen. is this too thick?

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    Quote Originally Posted by IP Outdoors View Post
    I have taken it apart and inspected. looks fine. its a rather new wheel with less than 50 miles. I relubed with food grade mineral oil from the kitchen. is this too thick?
    I can't expertly say whether what you've used is too thick or not as I've only personally done this once a long long time ago with a wheel that I owned. But if it's a new wheel with 50 miles on it, the place you bought it from should be handling this.

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    Quote Originally Posted by IP Outdoors View Post
    I have taken it apart and inspected. looks fine. its a rather new wheel with less than 50 miles. I relubed with food grade mineral oil from the kitchen. is this too thick?
    Don't be confused by the "mineral oil" reference. This is widely known to be a poor translation from the French - "mineral oil" means "oil from the ground" otherwise known as regular petroleum based oil. The food grade mineral oil you used is probably pretty easy to wash out with water. Any grade of oil will work, with obviously more friction if you use higher viscosity oil.

    MAVIC freehubs are poorly designed relative to the rest of the industry, and your experience simply confirms that fact.

  8. #8
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    Quote Originally Posted by Kerry Irons View Post
    Don't be confused by the "mineral oil" reference. This is widely known to be a poor translation from the French - "mineral oil" means "oil from the ground" otherwise known as regular petroleum based oil. The food grade mineral oil you used is probably pretty easy to wash out with water. Any grade of oil will work, with obviously more friction if you use higher viscosity oil.

    MAVIC freehubs are poorly designed relative to the rest of the industry, and your experience simply confirms that fact.
    And user reviews confirm that as well:

    Mavic Aksium wheelsets - clincher Reviews - RoadbikeReview.com
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

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  9. #9
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    Quote Originally Posted by Lombard View Post
    Does the Ksyrium line share the same wheelhub as the Aksium?

  10. #10
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    Quote Originally Posted by IP Outdoors View Post
    Does the Ksyrium line share the same wheelhub as the Aksium?
    Not sure. Note that there are quite a few different versions of the Ksyrium which vary considerably in user reviews:

    wheelsets - clincher Reviews - RoadbikeReview.com
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    “Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein



  11. #11
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    Quote Originally Posted by IP Outdoors View Post
    I have a Mavic Aksium wheel that will spin alright when chain is on smaller cogs but seems to not spin as free when the chain is on larger cogs. is this normal for a low end set or something is binding somewhere? thanks in advance.
    Regardless of how much Mavic hubs suck and how to service them, I'm at a total loss to even guess how what cog you are in would have any impact on the hub spinning.
    I don't know what else could cause that either.

    Is that really what you meant to say? I don't see how it's possible. Coasting as in coasting right? Not moving the cranks at all? Are we talking really minor differences that could be in your head?
    Last edited by Jay Strongbow; 01-05-2018 at 01:47 PM.

  12. #12
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    Quote Originally Posted by Jay Strongbow View Post
    Regardless of how much Mavic hubs suck and how to service them, I'm at a total loss to even guess how what cog you are in would have any impact on the hub spinning.
    I don't know what else could cause that either.

    Is that really what you meant to say? I don't see how it's possible. Coasting as in coasting right? Not moving the cranks at all? Are we talking really minor differences that could be in your head?
    Yes. That is what I meant. Larger cogs are towards the middle of the wheel and the chain gets tighter on those gears. The chain length is fine though. It seems the tightness of the chain affects the freehub.

  13. #13
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    Quote Originally Posted by IP Outdoors View Post
    Yes. That is what I meant. Larger cogs are towards the middle of the wheel and the chain gets tighter on those gears. The chain length is fine though. It seems the tightness of the chain affects the freehub.
    well, the chain doesn't get tighter. The spring in your rear der. sees to that. Or if it really does you have separate problems as well.
    I got nothing.

  14. #14
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    MAVIC fail:

    Although I've had satisfactory service for years with Mavic wheels, I lately have had the same "death squeal" and frightening chain wrap on my MTB wheel, only at high speeds, and for me, only if the chain is on the smaller outer cogs; I can downshift and avoid the issue. I learned how easy it is for my wheel to remove the freehub without even removing the cogset, clean it and oil with Dumonde freewheel oil, all seems fine, but this issue is really dangerous, as I hit 52 mph going down paved road, and risking a chain catch in the rear hub/frame area is deadly. I theorized that the inner cogline puts less force on the outer end of the freehub, and more on the plastic bushing, the normal part which binds. I wonder if the outer small sealed bearing integrated into the freehub body is failing, and at speed the twisting force is causing enough movement to rub internally. Either way, the wheels are long out of warranty. The Hubdoctor on Ebay sells various improved bushings, which I have used for years, certainly a cheap fix for your likely situation; just be sure which generation and size you need; he was even selling ceramic bearing replacements which might last the life of the rest of the wheel.

  15. #15
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    The main reason it happens more often in the smaller cogs is the wheel is turning faster at any given cadence so more drag is created. I've noticed this in the workstand for years. Leverage might also have something to do w/ it.
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  16. #16
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    Mavic screech

    Quote Originally Posted by cxwrench View Post
    The main reason it happens more often in the smaller cogs is the wheel is turning faster at any given cadence so more drag is created. I've noticed this in the workstand for years. Leverage might also have something to do w/ it.
    I believe you misunderstood my description - it begins typically when going above 25mph, so I have usually been pedalling in the small cog, but the squeal does not necessarily immediately begin when pedalling stops. I can be in a tuck for many seconds, even minutes, merely coasting, before it arbitrarily starts screeching and wrapping the chain. If I simply think to shift down to the second or third largest cog before tucking, I can be going just as fast, hence the wheel/freehub relative speed is also just as fast, yet the screeching does not occur. I am still pondering alternative ideas, but the leverage against the inner bushing should be trivial when the chain is sitting directly in line with the sealed bearing pressed inside the end of the freehub. Regardless of the source of the problem, for Mavic to have persisted in making such a flawed design for more than a decade, which clearly and repeatedly suffers from a common malady no other brand of hub replicates, seems the height of negligence.

  17. #17
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    I think the plastic heats up and expands during coasting and that's why it doesn't happen immediately. In ant case, as you said, mavic hubs are not that good!

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