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PostPosted: Tue Jan 08, 2013 11:23 pm 
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I am replacing my 3T Funda Pro fork with a new one on my 2008 Cervelo R3 SL. The steerer won't fit all the way through the head tube as the bit of the headset that fits into the bottom of the head tube won't slip down all the way to the crown of the fork. I.e. the steerer around 30mm-40mm from the crown is too wide for the headst to fit all the way. The steerer fits snugly but easily through the upper part of the headset


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Posted: Tue Jan 08, 2013 11:23 pm 


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PostPosted: Tue Jan 08, 2013 11:37 pm 
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Joined: Sun Sep 05, 2010 9:31 am
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Location: Belgian border
You need this to hammer the crown race onto the fork.

Image

Or better said: Bring it to a bike shop if you dont know what your doing


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PostPosted: Wed Jan 09, 2013 12:04 am 
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No, don't buy that tool, don't waste the shop's time.
Make one yourself, save your money.

http://www.bikecommuters.com/2007/09/29 ... ion-tools/

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PostPosted: Fri Jan 11, 2013 8:02 am 
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You could also cut the crown race open and never have to worry about this any more.

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PostPosted: Fri Jan 11, 2013 9:07 am 
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Location: Stockholm, The Arctic...
Hope the fork isn't tapered ?


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PostPosted: Fri Jan 11, 2013 9:27 am 
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PSM wrote:
Hope the fork isn't tapered ?

I have a sneaking suspicion that Cervelo still used a straight steerer on that frame. Pretty sure tapered steerers came in a year or two later. That may be the OP's issue.


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PostPosted: Fri Jan 11, 2013 9:35 am 
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Location: Stockholm, The Arctic...
ultimobici wrote:
PSM wrote:
Hope the fork isn't tapered ?

I have a sneaking suspicion that Cervelo still used a straight steerer on that frame. Pretty sure tapered steerers came in a year or two later. That may be the OP's issue.



Yep. The ST were straight back then.

Do NOT use the hammer yet. Show us a picture of your fork first! :smartass:


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PostPosted: Fri Jan 11, 2013 6:15 pm 
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Assuming it is not a taper mismatch, and is just a "tight-fit" problem:

1. You can smooth off the steere tube a little and make it very slightly smaller by rubbing with 600 grit sandpaper. It really doesn't take much to go from "won't fit at all" to "slides right on".

2. Add some grese.

3. You can find a PVC tube of the right diameters at home depot very inexpensively. No need to buy the special tools.

Quote:
You could also cut the crown race open and never have to worry about this any more.

? That sounds risky. Has it worked consistently ?


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PostPosted: Sat Jan 12, 2013 3:19 am 
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Actually many headset manufacturers deliberately make it that way. A properly tightened headset has the lower bearing pushing against the race from the outside (albeit at an angle) so all you need is at least 3 points along the circle that support the bearing. No problem whatsoever.

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PostPosted: Sat Jan 12, 2013 4:02 am 
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elviento wrote:
Actually many headset manufacturers deliberately make it that way.

Interesting! I suppose that pressure from tightening the headset tends to compress the ring anyway. So i can see how it could work.


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PostPosted: Sat Jan 12, 2013 6:17 am 
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I've cut the crown race on a number of occasions, never had any issues.

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Posted: Sat Jan 12, 2013 6:17 am 


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PostPosted: Sat Jan 12, 2013 12:53 pm 
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I got a bike shop to fit the new fork yesterday and they had no problems with the aid of a press etc.

No it wasn't a tapered one.

Thanks for comments

William


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