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What is this thing?

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What is this thing?

Old 10-31-20, 03:56 PM
  #1  
Ironskillet
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What is this thing?


What is this little knob poking from the head tube?
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Old 10-31-20, 03:58 PM
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Germany_chris
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It's a pump peg
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Old 10-31-20, 03:58 PM
  #3  
nlerner
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Pump peg.
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Old 10-31-20, 04:12 PM
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Here's one with a pump on it. I think pump pegs became more widespread when bikes started getting a second set of water bottle mounts on the seat tube.


1992 Performance Parabola
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Old 10-31-20, 04:21 PM
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Why not show the full bike
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Old 10-31-20, 07:12 PM
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Thanks dudes! Now I know! And knowing is half the battle.
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Old 10-31-20, 07:14 PM
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Gorgeous Rossin!
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Old 10-31-20, 08:38 PM
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Lovely!
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Old 10-31-20, 11:48 PM
  #9  
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Thanks guys!
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Old 11-01-20, 05:24 AM
  #10  
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Turbo boost button
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Old 11-01-20, 12:41 PM
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Originally Posted by P!N20 View Post
Turbo boost button
I thought it was either that, or where you fill the frame with helium.
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Old 11-01-20, 01:01 PM
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@Ironskillet - To be used like this:
P1040401 on Flickr
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Old 11-01-20, 01:08 PM
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Originally Posted by Ironskillet View Post
Now I know! And knowing is half the battle.
The great American hero!
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Old 11-01-20, 01:34 PM
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Vestigial frame tube or supernumerary top tube.
Most bicycle scientists feel the answer is inconclusive.
Either way, go ahead and use it to support a frame pump.
That's how most of us use it.
Whatever you do, don't finger it obsessively while riding.
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Old 11-01-20, 01:54 PM
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Originally Posted by Ironskillet View Post
I thought it was either that, or where you fill the frame with helium.
Nope, here's where you do that. 😄

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Old 11-01-20, 10:08 PM
  #16  
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Originally Posted by Germany_chris View Post
It's a pump peg
Aww man, you answered too quickly... I would have said something outrageous like "Zirx grease fitting for the head tube" ... (hey, what a great idea....)
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Old 11-01-20, 10:17 PM
  #17  
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If the pump can't be braced against something, then they are near useless. IMO.
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Old 11-02-20, 06:42 AM
  #18  
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Originally Posted by GamblerGORD53 View Post
If the pump can't be braced against something, then they are near useless. IMO.
Yes. Use to carry the pictured one on my Montello. Hit a hard bump on the MUP and it was knocked off! Almost caught in my spokes. Certainly upset my riding rhythm! Another time I hit it when using my DT's. CO2 is now the source of filling repaired innertubes or replacement sew ups.
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