1 1/8" headset size?

[doogie]

Hello Folks,
Can anyone tell me the size of the diameter of a 1 1/8" headset.
I am after the size of the diameter that is a push fit into the head tube of the frame. :?

Thanks in advance.

 

[neilll]

34mm outside cup diameter

 

[doogie]

Hello Neilll,
So am I right in thinking that the diameter in the frames headtube is 34mm?

 

[neilll]

Yeah, cos I'm 99% sure the frame cup outside diameter measurement is the same as the inside headtube diameter as headsets are a tight press fit.

Out of interest 1" is 30.2mm and 1 1/4" is 37.0mm

 

[doogie]

Cheers Neilll

 

[one-eyed_jim]

Yeah, cos I'm 99% sure the frame cup outside diameter measurement is the same as the inside headtube diameter as headsets are a tight press fit.

More than you ever wanted to know about headset press-fit dimensions in one .pdf:

http://www.sutherlandsbicycle.com/Chapter12.pdf

 

[Carsten]

nice summary too

http://www.chrisking.com/specs/headsets_all.html

and then there's the JIS 1" head set of which the cups have a diameter of 30.0mm (compared to the 30.2mm of the ISO 1" version)

Carsten

 

[doogie]

Thankyou very much folks for your info - it was all very helpful.
What would I do without you guys? :shock:
Cheers!