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  1. #1
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    Reputation: Wankel7's Avatar
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    What tool to remove this freehub?

    Freehub on my Diamondback Insight (City bike with 700 c wheels) bike isn't freehubbing like it should. It is an 8 speed hub and should be Shimano butI don't see any parts number.

    Googling says a 10mm hex should do it but that is too small and a 12 mm is too big....don't have access to an 11mm.

    Thanks!


    http://db.tt/Z4FCTj2c

    looking at the freehub

    http://db.tt/17CCQA6b

    looking down into the freehub

    They are dropbox links

  2. #2
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    Reputation: bvibert's Avatar
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    According to Park some brands use an 11mm hex wrench.

    Park Tool Co. ParkTool Blog Freehub Service

  3. #3
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    Reputation: Wankel7's Avatar
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    Thank you!

  4. #4
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    hey, did the 11mm hex worked for you? i cant get mine off even with 24" breaker bar

  5. #5
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    Reputation: Wankel7's Avatar
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    I ended up not needing to replace it. If you are using a 24" breaker bar and it isn't striping it out I would assume you have the right tool in the hub?

  6. #6
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    Yes, 11mm should be the right tool, but I am not entirely sure about me standing on the 24in bar and not moving the bolt at all, gonna visit performance later this week...

  7. #7
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    Reputation: bvibert's Avatar
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    Instead of standing on it, try hitting the wrench with a big hammer. The impact should help break it loose. Make sure you're holding the wrench firmly in the freehub so it doesn't start backing out and strip the head.

  8. #8
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    Don't forget that when re-installing the freehub use some grease (or better yet "neversieze" on the bolt threads and tighten the bolt to the freehub to the correct torque.

    Torque Specifications - Bicycle Tutor

    After you take the freehub off the hub, you can pry out the rubber seal on the bottom, and using a pars washer or solvent you can flush out old grease, dirt, etc out of the freehub. After that I blow the solvent out with an airline, then have used several methods to grease/oil the tiny ball bearings inside the freehub. Have used 30 motor oil by holding the freehub upside down and pouring the oil thru the bottom of the freehub. (before I put the rubber seal back on).
    Park Tools has a picture service story to show what I'm talking about.
    Park Tool Co. ParkTool Blog Freehub Service

    I've also used a Moringstar freehub greasing tool, but I believe the company is no longer in business. {Please correct me if I am wrong}. He made a neat tool that fit inside the top end of the freehub, and he made a real slick thin grease that you could inject into the freehub. Freehub Buddy / Morningstar Tools

    IF you are REAL "nerdy/OCD" you can make a removal tool out of 1/8" thick plate and you can unscrew the inside top of the freehub. {NOTE it is a "backwards" thread, i.e. a "left hand thread". } You leave the freehub in the wheel, gently pry out the top/end seal (without destroying it), so you can put the "plate" you manufactured, and using a long cresent to turn the plate and hold the plate down with your other hand unscrew it. NOTE: follow my suggestions at your OWN risk. If you decide to open up your freehub a million little bearings will come out along with the pawls inside. Ok not a million but like 50 1/8" ball bearings.
    Winterizing Your Freehub
    Last edited by IRONMAN1518; 11-03-2014 at 11:51 PM.
    Training on Hills Builds Character, That's How I Got To Be One!

  9. #9
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    Use IMPACT FTW!

  10. #10
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    What tool to remove this freehub?

    Morningstar is very definitely out of business. The very sad story here:
    http://reviews.mtbr.com/toolmaker-pa...alifornia-home

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