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Explain Like I'm 5: Don't I need a compression plug to oppose the stem bolt forces?

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Explain Like I'm 5: Don't I need a compression plug to oppose the stem bolt forces?

Old 09-30-19, 07:32 PM
  #76  
Kimmo
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Originally Posted by Seattle Forrest View Post
Are we talking about road bikes here, or BMX?
If you think about it, road bikes have as much if not more leverage over the top of the steerer than a BMX, particularly when landing. This is why I consider 31.8 bars to be an overdue development - so many old-school bar/stem interfaces were marginal at best, when it came to landing a bunny hop.
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Old 10-06-19, 10:40 AM
  #77  
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So guys, I know this thread is dead (and should stay dead), but I'm flipping my stem today to raise my bars a little & I thought I'd share a few pictures showing my TCR's factory compression plug.

The top of the bolt & the nut at the bottom tightens the plug from the bottom compresses the compression plug (see last picture), stretching the plug to the fork tube wall. It is covering all the length of the stem.






I know, I should probably remove one of the stem spacer to reduce the gap between my fork tube & top of stem. It was cut too short in my opinion.

Last edited by eduskator; 10-06-19 at 10:57 AM.
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Old 10-06-19, 11:18 AM
  #78  
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Originally Posted by eduskator View Post
So guys, I know this thread is dead (and should stay dead), but I'm flipping my stem today to raise my bars a little & I thought I'd share a few pictures showing my TCR's factory compression plug.

The top of the bolt & the nut at the bottom tightens the plug from the bottom compresses the compression plug (see last picture), stretching the plug to the fork tube wall. It is covering all the length of the stem.






I know, I should probably remove one of the stem spacer to reduce the gap between my fork tube & top of stem. It was cut too short in my opinion.


Yikes. I'll take a star nut & the stem clamped fully on the steerer tube over that.
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Old 10-06-19, 12:39 PM
  #79  
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I wouldn't be sure that your TCR steerer has been cut at all. You have a lot of spacers there.
My TCR-SL frame actually came with a light aluminium compression plug that could be glued in to replace the more adjustable, but heavy wedge arrangement.
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Old 10-06-19, 01:23 PM
  #80  
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Originally Posted by Dean V View Post
I wouldn't be sure that your TCR steerer has been cut at all. You have a lot of spacers there.
My TCR-SL frame actually came with a light aluminium compression plug that could be glued in to replace the more adjustable, but heavy wedge arrangement.
This is what I was thinking as well shortly after posting. There is indeed a good amount of spacers.
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Old 10-06-19, 01:58 PM
  #81  
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Originally Posted by woodcraft View Post
Yikes. I'll take a star nut & the stem clamped fully on the steerer tube over that.
Seems like Giant's engineers should have asked for your opinion before building one of the most reliable & used bike on the market. It's not like they sell over 5 million bikes each year.

I'll tell them to call you whenever they need advice.
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Old 10-06-19, 03:17 PM
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Originally Posted by eduskator View Post
Seems like Giant's engineers should have asked for your opinion before building one of the most reliable & used bike on the market. It's not like they sell over 5 million bikes each year.

I'll tell them to call you whenever they need advice.


I was yikes-ing that part of the stem is clamping air instead of the steerer tube. I doubt that Giant's engineers would approve of that set up.
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Old 10-06-19, 03:56 PM
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Originally Posted by woodcraft View Post
I was yikes-ing that part of the stem is clamping air instead of the steerer tube. I doubt that Giant's engineers would approve of that set up.
The stem bolt is actually just a little under the top end of the steerer tube. I was also a concerned, but I measured it & its OK.
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