Headset Spring - whats it for?

[punkdSICO]

Hi all

I got a lovely GT headset from a Rad member.  Its still not fitted but I was wondering, what is the spring for?  Here is a picture I have "borrowed" from a recent sale posting.  Its the thing in the bottom left of his picture:



ta,

Paul

[dordymush]

it keeps the head set tight.locks it.

[BrianP]

Yep, what Dave said above (hiya dave )

It's for spring loading the top cup of the headset.

Your top cone should have wee teeth in it, kinda like the inside of a cassette hub or freewheel. You pop it in and pretension it - stops the headset unwinding and getting loose.
I've one here - they're pretty good - after you get them set up right. that bit's kind of a pain...

Brian  

[punkdSICO]

..thanks guys..  Never seen these before.  Hopefully ill be assembling the bike (well, partically) in the next week or two.  Just need some frickin wheels!!!

thanks again,

Paul