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Old 09-29-12, 12:51 PM   #1
bluenote157
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threadless stem riser extender question...

Not sure if i'm in the right forum but i figure i'll post here..
My fork has been cut on the shorter side...which works great for an agressive fit when I have it in CX drop bar mode, but at the moment I'm trying to ride comfortably with moustache bars. I have cantis so I have a brake stop. If I use an extender, do I need spacers? What is the correct way to mount the brake stop? Should I put the brake stop on the extender then throw some spacers on it to get the stem to butt up? Or are the spacers not necessary as the tension has already been established once I install the extender and screw the star bolt thing down? I hope that makes sense.. thanks.
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Old 09-29-12, 03:24 PM   #2
MassiveD
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There are different ways of extending steering collumns. If the extension is so to speak, at the diameter of the stem, as it seems to be in this case, then it replaces the stem, and any spacers or hangers remain where they were with the stem, unless the extender does not have enough clearance for them. The extender, unlike the stem is not a passthrough fitting so you have to take that into account, you can't force the extender below the level of the steering tube and put spacers above it, as you can with the stem, so you have to emloy common sense when installing it.

The actual stem just fits on the extender, as the preload is all in the extender.

If the extension is at the diameter of the steering tube, then it basically assembles as it would if it were just a long steering tube.

Last edited by MassiveD; 09-29-12 at 03:28 PM.
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Old 09-30-12, 12:01 AM   #3
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Put the brake stop directly on top of the upper headset race..
If you get the sort that has a pinch bolt of its own
it will stay in place, and the only difference in the shorter set-up
is the extra housing and cable.

External clamp on stem riser will sit on whatever spacers you had ..
NB:
I would not do this to a Carbon steerer tube fork, only a metal one.
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Old 10-01-12, 11:56 AM   #4
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thanks guys.. I completely forgot that my stop has a clamp type bolt.
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