How short is too sh...
 

[Closed] How short is too short - Steerer/Stem interface

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I bought a pair of forks understanding the steerer was 200mm long.

In reality its closer to 195mm.

Working with already fine tolerances (I really needed 200mm) the steerer sits maybe 5-6mm beneath the top cap with the top bolt of the stem maybe 3/4 engaged with the steerer.

Is this too greater gap as is?

I don't really want the expense of a 35mm stack stem especially as I need 80mm reach and the 35mm stack stems tend to be no longer than 60mm 🙁


 
Posted : 12/06/2015 10:40 am
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I would say it's a tad too short.

Remove the top can from the headset and clean regularly?


 
Posted : 12/06/2015 10:42 am
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Hmmm, Id not be too happy with having that much gap. Where is the top clamp bolt in relation to the top of the steerer?


 
Posted : 12/06/2015 10:42 am
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Syntace Flatforce is only 25mm stack, comes in loads of lengths, its one of them negative stems though, but you could flip it no worries

http://www.syntace.com/index.cfm?pid=3&pk=2629

the megaforce is 36mm stack and comes in a 80mm

http://www.syntace.com/index.cfm?pid=3&pk=2050


 
Posted : 12/06/2015 10:42 am
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oh and I think the on one / planet x / superstar CNC stems are about 35mm and the PX ones are £20 in 80mm length.


 
Posted : 12/06/2015 10:44 am
 nuke
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Sounds ok to me but does depend on riding you do etc.

Ive found a few of the FSA stems are 35mm stack and in 80mm+ lengths...just checked and my 29er had an FSA OS120 which is 80mm with a 35mm stack height


 
Posted : 12/06/2015 10:45 am
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I don't really want the expense of a 35mm stack stem

It'll be cheaper than the dentist bill 😉


 
Posted : 12/06/2015 10:51 am
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I hadn't budgeted for needing a new stem.

The stems top bolt sits maybe 1/2 in and out. 😕


 
Posted : 12/06/2015 10:52 am
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Too short IMO, all my bikes have a 5mm spacer on top of the stem, just seems sensible to me.


 
Posted : 12/06/2015 10:56 am
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Mine has a similar gap on my main trail bike for the past year and I haven't died yet.. It does get a lot of hammer too.
Appreciate I've just jinxed myself..


 
Posted : 12/06/2015 11:00 am
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Aren't there low-stack headsets too?


 
Posted : 12/06/2015 11:06 am
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Aren't there low-stack headsets too?

Some are lower than others, but all will be as much or more than a new stem.

You can remove the headset top cap and just run it with a tiny spacer on top of the split ring/bearing.


 
Posted : 12/06/2015 11:13 am
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I ran a cheap Pace RC31 for a year or more, with the top bolt below the steerer top. Used a bit of cut steerer to pack it up. Didn't budge. Later added an Amoeba headlock, but you cant run them with some forks.


 
Posted : 12/06/2015 11:24 am
 Yak
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Too short. Get the planet x cnc stem. 80mm and £20.
http://www.planetx.co.uk/i/q/STPXCNC/planet-x-ultralight-cnc-stem


 
Posted : 12/06/2015 11:29 am
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AlexSimon - Member

Aren't there low-stack headsets too?

I'm using an external lower (1.5'') and a internal upper 1 1/8'' so nothing to play with stack height wise 🙁

Too short. Get the planet x cnc stem. 80mm and £20.
http://www.planetx.co.uk/i/q/STPXCNC/planet-x-ultralight-cnc-stem

Oddly I have an aversion to painted stems but this stem looks like it might resolve the issue if a little more costly:

http://www.planetx.co.uk/i/q/STOOCNC/on-one-ultralight-cnc-stem

Hmm.


 
Posted : 12/06/2015 11:53 am
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The on-one stem you linked is a decent bit of kit for the money.


 
Posted : 12/06/2015 11:59 am