Splined seatpost.Who made the frame?

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Paulus

Started young, and still going.
Location
Barnet,
Not splines but mine has some grooves milled into it, just for aesthetics or summat.

I've got a similar seat post, an ITM, 26.8mm, but it does fit into a normal seat tube though.

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biggs682

Itching to get back on my bike's
Location
Northamptonshire
A bit about Norman Fay here https://classicrendezvous.com/country-of-origin/the-british-isles/norman-fay/

Looks like he started in the early 70's
 
OP
OP
joeegg

joeegg

Regular
Location
Barnard Castle
The bottom bracket has 2768 stamped with a logo between the 2 and 7.
 

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T4tomo

Legendary Member
Ah yes have seen that before but not often. An alternative to have a "split" in the seat tube being gripped / squeezed together by a clamp or bolt.
The bolt brings the two shaped parts together to directly clamp the seat post rather than clamp the seat tube to the seat post. Unusual but quite neat.

I think you confused everyone with "splined" in the title.
 

Paulus

Started young, and still going.
Location
Barnet,
Ah yes have seen that before but not often. An alternative to have a "split" in the seat tube being gripped / squeezed together by a clamp or bolt.
The bolt brings the two shaped parts together to directly clamp the seat post rather than clamp the seat tube to the seat post. Unusual but quite neat.

I think you confused everyone with "splined" in the title.

Indeed, it looks like it is a sleeve, albeit it two parts.
 
So the internal wedge style clamp works on any style of post and is not related to the splininess.
 
OP
OP
joeegg

joeegg

Regular
Location
Barnard Castle
I don't think it would work with a non splined/grooved seatpost.The wedges actually sit into the grooves/splines and besides gripping the post they automatically centre the saddle.
 

Drago

Legendary Member
I think grooves in the seat post were from the days when weight reduction was king.

Indeed. They're called "flutes." Top flight racing machines had them machined in(!) to remove material and save weight.

Bikes for us mortals had them cast in, which required a greater wall thickness to accommodate this, so didn't save weight but looked tres cool. Trendy types paint then fluted portions with red enamel.
 

Vapin' Joe

Formerly known as Smokin Joe
I think grooves in the seat post were from the days when weight reduction was king.

Brake levers, chainset and anything possible were drilled to save weight.

Indeed. They're called "flutes." Top flight racing machines had them machined in(!) to remove material and save weight.

Bikes for us mortals had them cast in, which required a greater wall thickness to accommodate this, so didn't save weight but looked tres cool.

And let water run into the frame.
 
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