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  1. #1
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    Compression Plug for 1'' Carbon Steerer

    Hello!

    Maybe you guys can help me. I purchased a used Ouzo Pro 1'' fork. It can with an expander plug (with o-ring), a cylinder wedge piece, and a bolt. However, I think it is incomplete because I can't get it to tighten right with a normal stem cap.

    Looking at photos, I think it may be the Reynolds compression plug, minus the topcap with seems like I would need...

    Trying to order a replacement, I see FSA has one as well as Reynolds, but I'm confused as to if I need to order a 1'' (size of the steerer) or a 1-1/8'' (Size of the stem). If I order an expander plug for a 1'' steer, does this mean the cap will be the wrong size?

    Hopefully this makes sense...

    Cheers.

    Tim

  2. #2
    hello roadfix's Avatar
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    That compression plug that comes with that fork expands by tightening the allen bolt within the plug. Then, use the stem cap (supplied with plug) to preload the headset.

  3. #3
    slow as I ever was Ex Pres's Avatar
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    You need a 1". But if the expansion plug is still in there it should work fine. Why do you think it's not working?
    A 1 1/8" stem? Do you have it shimmed? Something's not adding up here.
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  4. #4
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    If you have a 1" steerer tube you need a 1" compression plug and a 1" stem. Most stems are 1 1/8" and many come equipped with sleeve to adapt to a 1" steer tube. If you can buy a Reynolds 1" compression plug and top cap, that you be ideal. The FSA version is also good enough and easy to use.

    Al

  5. #5
    Bikes are fun.
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    yeah, it's a 1-1/8'' stem that is shimmed. but do you know what i mean, that if i were to buy a 1'' stem cap (which i assume comes with a 1'' compression plug kit) it won't fill the stem 1-1/8'' hole?

  6. #6
    hello roadfix's Avatar
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    I see the picture now. You kind of need an oversized stem cap to go with your 1" compression plug. Either that or try to find a true 1" stem.

  7. #7
    A little North of Hell
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    Wordage...expander vs. plug

    Quote Originally Posted by FlatlanderIA View Post
    It can with an expander plug (with o-ring), a cylinder wedge piece, and a bolt. However, I think it is incomplete because I can't get it to tighten right with a normal stem cap. Looking at photos, I think it may be the Reynolds compression plug, minus the topcap with seems like I would need...
    If I order an expander plug for a 1'' steer, does this mean the cap will be the wrong size?
    Quote Originally Posted by FlatlanderIA View Post
    yeah, it's a 1-1/8'' stem that is shimmed. but do you know what i mean, that if i were to buy a 1'' stem cap (which i assume comes with a 1'' compression plug kit) it won't fill the stem 1-1/8'' hole?
    Most expanders tighten seperately from the top cap.
    Most compression plugs have the top cap integrated into the plug as a single unit.
    If you have a 1" expander(sounds like you do?), you can use a 1-1/8" top cap with it.
    Take the bolt out and put the expander into your steerer, then tighten it with the correct size allen.
    Then use a 1-1/8" top cap with your stem.
    Here is the Hope expander PDF. Should be similar/close to most expander instructions.
    http://www.hopetech.com/database/hed...uctuctions.pdf
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  8. #8
    Senior Member
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    Quote Originally Posted by Soil_Sampler View Post
    Take the bolt out and put the expander into your steerer, then tighten it with the correct size allen.
    Then use a 1-1/8" top cap with your stem.
    Some expanders(I believe FSA is one make) are configured so the top cap has an internally threaded sleeve projecting down from it that screws on over male threads on the expander body and tightens down to preload the headset. These cannot be replaced with a regular top cap.

  9. #9
    A little North of Hell
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    Quote Originally Posted by HillRider View Post
    Some expanders(I believe FSA is one make) are configured so the top cap has an internally threaded sleeve projecting down from it that screws on over male threads on the expander body and tightens down to preload the headset. These cannot be replaced with a regular top cap.
    Quote Originally Posted by FlatlanderIA View Post
    It came with an expander plug (with o-ring), a cylinder wedge piece, and a bolt. However, I think it is incomplete because I can't get it to tighten right with a normal stem cap.
    His does not.
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  10. #10
    Fun begins @ 200k Gunther's Avatar
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    I have a 1" Reynolds fork. The expander plug and the top cap are made to work as an integrated assembly, so the only substitution I'd think might work is to get another expander plug for a 1-inch steerer that uses a plain-ole bolt for tightening so you could use a regular top cap. FWIW, I thought the Reynolds plug/cap was overly complicated for the task, plus it transfers torque to the stem while tightening which made steering alignment a bit more tedious.

    I also use a 1-1/8 inch stem on mine. I put a steer tube spacer on top of the stem. The top cap fits into the spacer while it's outer diameter provides better contact with the stem opening.

    GtB

  11. #11
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    thanks for your comments everyone. i talked to reynolds on the phone about this and here's what they said:

    they recommended I use their 1'' top cap expander, and put a 1'' spacer (even if it's only a 2.5mm) on top of the stem. That way, it is applying more force directly down the steerer tube. ordered an expander from them online.

    the guy i talked to was very cool by the way, someday when i upgrade my rolfs, i'll take a serious look at their wheelsets.

    cheers!

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