Fitting a starnut in a planet x pro carbon fork

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tpbiker
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Joined: Fri Feb 22, 2013 22:09 pm

Fitting a starnut in a planet x pro carbon fork

Postby tpbiker » Tue Feb 26, 2013 19:49 pm

hi

I just bought a planet x carbon frame and forks second hand, although hardly ridden, and on arrival today I notice that theres a starnut fitted. The steerer appears to be carbon, however it appears to have an aluminium inner 'core'

Now a quick google tells me that starnuts on a carbon fork are a big no no. Is this the case with these forks, or does the fact the carbon looks to have an alu core make it ok?? Anyone able to confirm?

If its not a good idea, can it be removed? and if so can something like a head doctor replace it?

Many thanks

Tim

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apreading
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Joined: Thu Sep 18, 2008 23:57 pm

Re: Fitting a starnut in a planet x pro carbon fork

Postby apreading » Tue Feb 26, 2013 19:57 pm

Alot of carbon forks have alu steerers. I know alot of 'carbon' seatposts (especially the OEM ones you get with the bike) are actually carbon wrapped aluminium. I havent heard mention of carbon wrapped alu steerers but I suppose it is possible. If that is the case then perhaps a starnut is OK as it wont cut into the carbon if the alu is protecting it...

Certainly in an all carbon steerer you should have a compression bung rather than a starnut.

If you want to be sure, you could always call Planet-X.

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smidsy
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Re: Fitting a starnut in a planet x pro carbon fork

Postby smidsy » Tue Feb 26, 2013 20:55 pm

Photo would help to determine what you actually have.
Yellow is the new Black.

tpbiker
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Joined: Fri Feb 22, 2013 22:09 pm

Re: Fitting a starnut in a planet x pro carbon fork

Postby tpbiker » Tue Feb 26, 2013 21:18 pm

Image



[imghttp://i1241.photobucket.com/albums/gg510/timp1976/06022011138.jpg][/img]

I mailed the chap who sent me them, and he tells me its an aluminium sleeve bonded into to the carbon steerer. Apparently the kit is made by easton. Never heard of it myself, is that a common fix for a carbon steerer? I would have thought it might compromise the carbon structure.

Also means I can't cut the steerer down, but so long as its safe then its not a big deal. Infact I'd quite like one for my MTB fork as the headdoctor I use is a pain.

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smidsy
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Re: Fitting a starnut in a planet x pro carbon fork

Postby smidsy » Tue Feb 26, 2013 21:21 pm

As the inner walls are aluminiuim a star nut is appropriate.
Yellow is the new Black.

tpbiker
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Joined: Fri Feb 22, 2013 22:09 pm

Re: Fitting a starnut in a planet x pro carbon fork

Postby tpbiker » Tue Feb 26, 2013 21:47 pm

yep, its just a sleeve kit hes glued in, not alu all way down. I guess its just like an expanding fork bung, only I can't ever get it out to trim my steerer

keef66
Posts: 8737
Joined: Tue Apr 29, 2008 09:46 am

Re: Fitting a starnut in a planet x pro carbon fork

Postby keef66 » Wed Feb 27, 2013 10:44 am

You can still cut the steerer down but it will be more of a faff.


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