Mystery Aheadset

I have acquired a road bike with mystery headset. On the outside it
says Cane Creek and Aheadset but when you tale the top off there is like
a rubber insert which i assume is expandable and there is a sort of disc
on the top of this rubber that has arrows pointing either way with 'H'
at the end of one arrow and 'S' at the end of the other arrow. I cant
fine it any catalogue but I would like to know what it is and what the H
& S are for. The disc doesnt seem move around easily and i havent
forced it.
Any help and or guidance would be appreciated
Brian

"Brian Goldsmith" wrote in message
...
I have acquired a road bike with mystery headset. On the outside it says
Cane Creek and Aheadset but when you tale the top off there is like a
rubber insert which i assume is expandable and there is a sort of disc on
the top of this rubber that has arrows pointing either way with 'H' at the
end of one arrow and 'S' at the end of the other arrow. I cant fine it any
catalogue but I would like to know what it is and what the H & S are for.
The disc doesnt seem move around easily and i havent forced it.
Any help and or guidance would be appreciated

Are you talking about the top cap? If so, it sounds like you have one of the
many star nut replacement devices. Have a look at
http://www.chainreactioncycles.com/C...CategoryID=204 and see if
there's anything like what you're describing...

Thanks for that.. yes it looks as though its along those lines. I dont
see mine there but at least I have some thing to go on. further
research is needed now to find out exactly how it works and the set up
procedure.

Doki wrote:

"Brian Goldsmith" wrote in message
...
I have acquired a road bike with mystery headset. On the outside it
says Cane Creek and Aheadset but when you tale the top off there is
like a rubber insert which i assume is expandable and there is a sort
of disc on the top of this rubber that has arrows pointing either way
with 'H' at the end of one arrow and 'S' at the end of the other
arrow. I cant fine it any catalogue but I would like to know what it
is and what the H & S are for. The disc doesnt seem move around easily
and i havent forced it.
Any help and or guidance would be appreciated

Are you talking about the top cap? If so, it sounds like you have one of
the many star nut replacement devices. Have a look at
http://www.chainreactioncycles.com/C...CategoryID=204 and
see if there's anything like what you're describing...

"Brian Goldsmith" wrote in message
...

Doki wrote:
Are you talking about the top cap? If so, it sounds like you have one of
the many star nut replacement devices. Have a look at
http://www.chainreactioncycles.com/C...CategoryID=204 and see
if there's anything like what you're describing...

Thanks for that.. yes it looks as though its along those lines. I dont
see mine there but at least I have some thing to go on. further research
is needed now to find out exactly how it works and the set up procedure.

I would expect tightening it clockwise would firstly expand the rubber, and
secondly, pull it upwards, to tension the headset bearing. You'll be able to
tell by feeling for play and binding in the bearing when you have tension
about right.

Sheldon Brown has a page on tensioning aheadsets, I think.

On the other hand, I quite like a star fangled nut and a normal topcap -
these things seem like a solution looking for a problem, unless you like to
swap forks very often.

On 14 Sep, 09:12, "Doki" wrote:
"Brian Goldsmith" wrote in message

...

Doki wrote:
Are you talking about the top cap? If so, it sounds like you have one of
the many star nut replacement devices. Have a look at
http://www.chainreactioncycles.com/C...egoryID=204and see
if there's anything like what you're describing...

Thanks for that.. yes it looks as though its along those lines. *I dont
see mine there but at least I have some thing to go on. *further research
is needed now to find out exactly how it works and the set up procedure..

I would expect tightening it clockwise would firstly expand the rubber, and
secondly, pull it upwards, to tension the headset bearing. You'll be able to
tell by feeling for play and binding in the bearing when you have tension
about right.

Sheldon Brown has a page on tensioning aheadsets, I think.

On the other hand, I quite like a star fangled nut and a normal topcap -
these things seem like a solution looking for a problem, unless you like to
swap forks very often.

Or use forks with carbon steerer tubes, in which case star-fangled
nuts are an EXTREMELY bad idea.