And times nicely with the lapse of the patent...
King Headset scoring: fact or myth?
well a rubber o-ring centering the steerer was always a superior design to the split ring... apparently..
I guess the old fault only developed with long travel forks. I have 5 King headsets fitted to XC bikes, one being 12 years old, and I've never had this issue develop.
Yes - 80mm fork / 100mm fork all developed the scoring on alloy fork steerers - headset creaked - shame as the bearings are just superb and last years - hope the wedge design is retro fittable?
A couple of guys tested why King bearings last, they said it's not because they are any better but as a consequence of that rubber o-ring offering some give. Good side effect of a not so good design?
Strange. All the years I've used Kings and this has never happened. And that's with modern 100mm XC forks, racing quite a lot.
On some forks yes but thats due to badly fitting the headset AND not revisiting the preloading after you've fitted for the first time to check and reload.
Plus I'd rather die in flames than ride a FSA or Hope headset.
Sorry, we stylish ones suffer for our superior class. Sniff.
If a king headset hasnt been checked for years then its quite common to find the o-ring worn.. even on short travel bikes.doesnt have to be over 150mm. the worst ones have big worn down flats on the o-rings.
removing the 0-ring and flipping it over if you can get it to stay in that position is a free fix that doesnt take too long.not the answer to it but worth doing if you have to refit that thrashed o-ring.
Have you had the headset scoring the fork steerer tube?
Did you have the headtube faced before installation?
Did this occur on a steel or aluminium steerer?
I currently have 2 bikes running Chris King headsets.
On one of the bikes I have had the fork scored by the headset.
My headtube was already faced.
The scoring occured on a aluminium steerer.
The scoring has not occured on my other bike. The scoring does not bother me in the slightest, and I'm sure other headsets will cause the same mark.
and I'm sure other headsets will cause the same mark.
Really? Never seen it from any other headset.
I'm sure other headsets will cause the same mark.
Chris Kings are uniquely designed different to other headsets. The scoring is a result of the flex that is allowed by the "o" ring present in the CK design. This is not possible in standard "aheadsets" as they have a metal compression ring which locks the steerer tube in place wrt to the headset bearing inner sleeves (...assuming they are correctly fitted and adjusted)
Yes frame was faced by builder
my CK headset has been on a number of frames and has had coil Revelations , Pike 409's, Fox 36's, Magura Thors and now has coil 454 Pikes in it.
I've never seen any scoring on any of the forks but did see a tiny mark on my 409 Pikes but would have hardly been worried by it.
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