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 Post subject: chopping a steerer
PostPosted: Tue Jul 11, 2006 3:52 pm 
Retro Guru
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Joined: Wed Apr 12, 2006 4:23 pm
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Location: leicester
i cant remeber-is it possible to trim a threaded steerer and rethread it lower down???


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 Post subject:
PostPosted: Tue Jul 11, 2006 4:16 pm 
BoTM Winner
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bit dodgy if its been butted , the tube would be thinner lower down , and with the thread removing more metal .......... :shock:


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 Post subject:
PostPosted: Tue Jul 11, 2006 4:23 pm 
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
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Slim is right, they are finer lower down . so not a very good idea.


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 Post subject:
PostPosted: Tue Jul 11, 2006 4:47 pm 
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its a manitou 4 if that makes a difference? unless anyone has a spare unthreaded 1 1/8" one...


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 Post subject:
PostPosted: Tue Jul 11, 2006 5:00 pm 
BoTM Winner
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suppose you could use it with a ahead stem , and one of those headlock bolts rather than a starnut which might damage the thinner walls

just bought this one , 1 1/4 for a build i am doing , cant stand those star nuts , f*****g `orrible things


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 Post subject:
PostPosted: Tue Jul 11, 2006 6:31 pm 
B.o.T.M. Winner / Feature Bike
B.o.T.M. Winner / Feature Bike
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Location: Tilting at windmills and shouting at the rain.
You'll be fine to rethread that steerer, a majority of older steerers aren't butted, almost none of those sus steerers were at all.

The threads appear to be finer at the bottom because they haven't gone all the way through the thread cutting tool unlike the ones further up, not because of butting. Just find a good LBS and they should still have the tools to do it (or go to a frame shop)


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 Post subject:
PostPosted: Wed Jul 12, 2006 1:39 am 
BoTM Winner
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Joined: Sun Oct 23, 2005 7:22 pm
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Location: Wooster, Ohio
I agree with Pete, you'll be fine to cut and extend the threads. Just take your time with the die, use lots of cutting oil, and make sure you back relieve the new threads to break the chip every two rotations or so.

As an aside, in my experience in repairing and building all types of forks, butted steerers are thicker at the crown and thinner at the superior end of the tubing.

cheers,

rody


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