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3mm between steerer tube top and stem top?

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3mm between steerer tube top and stem top?

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Old 01-14-06, 09:35 AM
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troie
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I refuse to pay $30 just to have my new fork put on. The headset is already pressed in and Ive already installed the crown race. All thats left is to cut the steerer tube to the proper length and attaching the headlock. $30 seems a bit high for a 2 minute job.

I read at parks site to make sure there is a 3mm gap between the top of the steerer tube and the top of the stem. Is this gap there to allow the stem cap (or in my case the headlock) to firmly squeeze the race, stack and cups all into place? Ill be using a dremel with a diamond cutoff wheel at a low speed. Should it be high?

Ill be adding 3 - 10mm spacers under the stem and marking it right on top of the stem. Remove fork and cut 3mm below the line. Sound good?

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Old 01-14-06, 10:05 AM
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id recommend leaving some extra steerer above the stem to give you some flexibility and fitment options. after you ride the bike for some time and really get to know where you want the bars, trim the rest of the steerer off.
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Old 01-14-06, 10:19 AM
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Ditto, the spacers on top. Make sure the stem is where you want it, that may take some trial and error. Measure twice, cut once.
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Old 01-14-06, 10:21 AM
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As legalize it recommended, cut the steerer about 7 mm above the top of the stem and add a 10mm spacer under the top cap. That will give you the 3mm gap you need and allow you to raise the stem by 10 mm in the future if you want to. Ride the bike for a while and see if the stem is where you want it. If so, and the extra spacer offends you, cut the steerer 10 mm shorter and eliminate the top spacer.

You can always cut the steerer shorter, you can't make it longer.
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Old 01-14-06, 12:12 PM
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I lucked out because I had a jig saw laying around. I made my mark, cut it and filed it down. Came out pretty good actually. Only problem I have now is the headlock. After putting on the 3 - 10mm spacers and the stem, the bolt of the topcap only screws into about 3 or 4 threads of the headlock base. I may have too long of a steerer tube which measures out to around 8 and 3/4". Im worried that while riding, those three threads wont provide much stability and everything will fall apart...
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Old 01-14-06, 01:48 PM
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Why bother with a $20 "headlock" when a $1.00 starnut works just as well and weighs less. Set the starnut the recommended 15 mm below the top of the top spacer or the top of the stem, whichever is higher and the top cap compression bolt will fit properly.

BTW, once you have the headset adjusted properly and the stem clamp bolts tightened, the top cap bolt does absolutely nothing and, in theory, can be removed and done without. If it it unscrews, there will be no problem. Nothing will fall apart. So, if you want to use the headlock and can make the initial adjustment, you don't have to worry.
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