What's this?

[Jon George]

I'm currently stripping down an old Peugeot frame to convert to a fixe and have come across this protrusion on the inward-facing side of the head tube. It does not seem to have a hole (for, perhaps, grease), and Google has yet to throw up any likely answers. So, over to you!

Sorry for the poor quality of the photograph.

 

[rogerzilla]

Pump peg.

 

[Ming the Merciless]

Is there just the one protrusion ?

 

[Jon George]

Is there just the one protrusion ?

Yes.

 

[Jon George]

Pump peg.

There's nothing opposite it on the seat tube and, anyway, that would make for one huge pump! (Unless there are pump that would fit?)

 

[Spiderweb]

Definitely a pump peg for one of those long frame pumps.

 

[Smokin Joe]

There's nothing opposite it on the seat tube and, anyway, that would make for one huge pump! (Unless there are pump that would fit?)

As in Spiderweb's photo, it doesn't need a second peg. The pump is shaped to fit the tube.

 

[Spiderweb]

@Jon George you can still buy frame pumps to utilise the peg, might be nice on a retro refurb?

 

[rogerzilla]

Back in the day, seat angles were a degree or two slacker than head angles, so the pump was squeezed tighter if it tried to slide down the seat tube. It's a bit less secure on a modern Taiwanese tourer with a 71 deg head and 73 deg seat.

 

[Jon George]

Thanks for the replies folks. @Spiderweb's photographs reminds that I used to see them back in the day.

I'm going to have to give a long thought to what I'll do next - I had planned to file down everything not needed for my fixie, so as to get a clean a look as possible, but now I'm not so sure.

 

[freiston]

My bike (2014 model) has one and I used to use it with my Zefal Rev 88 pump before I got my Lezyne Micro Floor Drive pump. The Rev 88 pumps come in different lengths (so you can get the right one for your frame) and only cost about four or five quid.

EDIT - here's a link: https://www.tredz.co.uk/.Zefal-Rev-88-Frame-Fit-Pump_42237.htm