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Old 02-28-08, 08:01 PM   #1
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Steerer length for stem?

Hey guys I am building up my frame. I bought the frame and fork used. The original owner said that the fork was cut for a zero stack height. I am assembling everything together. From the top of the headet to the top of the fork is 37.30625mm. Most stems have a 41mm stack height.

That means the gap from fork top to stem top is 3.69375mm. I see it recomended for 2-3mm. is this gap to big?

I know some stems have a lower stack (38mm) height so what is the biggest gap that is safe?

Thanks
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Old 02-28-08, 08:21 PM   #2
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It is often recommended that the acceptable gap can be as large as 5 mm with no problems. I'd be a bit concerned with 5 mm if the steerer is cabon and no worries at all if it's steel or Al. Your 3.6 mm gap should be fine. I hope it gets the bars high enough as you have no room for further adjustment.
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Old 02-28-08, 08:26 PM   #3
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it is a carbon steerer.
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Old 02-28-08, 08:44 PM   #4
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I'd try for a shorter stem. I also recommend that you not exceed 5nm when torquing the stem pinch bolt(s) regardless of the stem torque spec.

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Old 03-02-08, 10:31 AM   #5
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I found a stem that is a stack height of 37mm. Do they make 1mm or 2mm spacers? The smallest I see is 5mm.
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Old 03-02-08, 10:40 AM   #6
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Yes
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Old 03-02-08, 11:20 AM   #7
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If it doesn't fit it isn't a good deal regardless of price.

1. If you had a brand new uncut steerer, how high would you want your handlebar?

2. some carbon fork manufacturers actually specify that you install a short stack spacer ABOVE the stem so that the clamping force isn't applied against the top of the steerer.
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