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Chris King Headset Baseplate/Carbon Steerer(11 posts)

Chris King Headset Baseplate/Carbon SteererMellowVelo
Oct 21, 2002 9:10 PM
I've done a few threadless headset/fork installs, but this is my first Chris King and my first carbon fork. The headset/steerer are the right size, but I can't get the baseplate on the headset over the ledge at the bottom of the steerer.. I attatched a picture.. With an alloy steerer I ccould get it on.. on the carbon steerer it looks to me like it would just ruin the steerer. Take a look at the two pictures.. the first shows the steerer with the baseplate.. the second shows the fork/headset installed w/o the baseplate..

re: Chris King Headset Baseplate/Carbon SteererMellowVelo
Oct 21, 2002 9:15 PM
The headset installed w/o the baseplate... I guess my real question is with the fork crown diameter matching that of the lower cup of the headset, what is the point in having the baseplate?? I've seen a bunch of forks where the crown diameter is less than that of the lower cup, but there is no baseplate? Am I dumb??
re: Chris King Headset Baseplate/Carbon SteererJuanmoretime
Oct 22, 2002 1:41 AM
It's best to use the proper tools. I just put a base plate on a Columbus Muscle last night. I use a Park Race setting tool and lube the crown area of the fork with dishwashing detergent. Hit the tool a couple times with a hammer until the base plate is set. I then rinse off the the dish washing detergent and dry it and assemble. LoL
looks don't count...C-40
Oct 22, 2002 4:44 AM
Its the actual size that matters. Use calipers to check the OD of the bottom of the steerer and the ID of the base plate. There should be an interfence fit in the range of .002 to .004 inch. If the interference is greater, you may cause damage to the steering tube.

You also need a crown race tool to install drive the baseplate in place, without causing damage to the baseplate.
There's no way,TJeanloz
Oct 22, 2002 5:25 AM
Unless either the steerer tube, or crown race are grossly out of spec (which I have never seen), there won't be any damage to the steerer tube. These things aren't supposed to be easy to install- if it were, you'd have a problem. And Chris King is noted for being a little bit tight all the way around.

CK insists that you use his tools(
to do the job, to better protect the races. This is a job that I'd leave to the bike shop- not because they're any more qualified, but because they have the correct tools. If you choose the Do-it-yourself route, you will need to grease the steerer tube, and pound with a slide hammer- but you should use some kind of washer to protect the race from the hammer.
guys i may be wrong but...ThirtyFive
Oct 22, 2002 12:27 PM
ck is sealed bearing. that is not a bearing race and does not need to be treated as such no? what is important is not to mess up the raised lip which does support the bearing race and the outer most portion which rests against the outer race. these distribute the load evenly between outer and inner race and should be kept perfectly level. whats in between is fair game for tapping. i used a piece of pvc with one end sanded very smooth so as to not leave pits (not that it matters, but i like my things to be pretty weather it is inside or out). then hold it in place so it does not contact the inner most portion of the ring and tap it with a hammer slowy going around in a circle. the idea is to force it down slowly but surely keeping it as level as possible

or you could bring it to your lbs and theyll do it for < $5
You're right, to a point,TJeanloz
Oct 22, 2002 12:40 PM
While it is a sealed bearing surface, it still needs to be protected. Warping or denting the crown race would definitely be sub-optimal - despite the sealed bearing, it still needs to be done with care.

FWIW Park Tool has a new tool that seems to make this all too easy...
you stated the way...C-40
Oct 22, 2002 2:38 PM
If the steering tube or the baseplate are not the proper size due to a manufacturing error, damage could occur. Certainly not impossible with mass produced products. What's so hard about taking a quick measurement? If the interference is too great, you can spare yourself a lot of grief.
You're right,TJeanloz
Oct 23, 2002 4:36 AM
A manufacturing error could lead to these being mis-sized, however, a really small manufacturing error wouldn't matter in a press-fit part, and a big enough error that would matter would almost certainly be caught by QC checks somewhere along the line.
IS fork on normal headset??str8dum1
Oct 22, 2002 12:21 PM
Why are you using an intergrated fork on a normal headset? You get a good deal on it or something?

I've never seen it done and my IS headsets didnt use a normal crown race on IS forks. I've never seen someone try to shove one on an IS fork.

Hope it doesnt break.
IS fork on normal headset??gray8110
Oct 22, 2002 3:00 PM
It isn't an integrated fork.. that's just the way columbus makes the 1-1/8th fork