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Old 09-26-08, 07:37 AM   #1
daveed
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Technomic stem doesn't fit fork

My long Nitto Technomic stem doesn't go deep enough into the steerer tube of a mid-70s Fuji Allegro. Did manufacturers thicken the lower portion of 1-inch steerers tubes back in the day? The tube's length, I would guess, is about 200 mm, more or less.

Thing is, the stem fits my current 1-inch fork just fine. Of course, I'll use it if need be. It's just that I'd hate to get rid of the frame's original fork.

Is there a way out?
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Old 09-26-08, 07:45 AM   #2
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Yes, the lower portion of the steerer tube is butted (thicker). With a smallish frame size, you're often limited with how far you can insert a stem into the steerer because of the steerer's short length. But with a Technomic stem, the idea is usually to get a lot of stem above the steerer, to achieve a more upright riding position (assuming you put enough of the stem into the tube to get past the min. insertion line). If it's not a high priority to get a lot of stem above the steerer, then the Technomic is probably not the stem for the application-
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Old 09-26-08, 08:02 AM   #3
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well biked is right. in responding here, I'll assume, as well biked has, that the stem's quill does go in far enough to be past the minimum-insertion line.
and as he says, there's not much point in going with the technomic (except that you already have it) if you don't want the handlebars high up there. you can easily and cheaply get a 1" quill stem with a shorter quill. It would be pretty weird to replace the fork just because you wanted to keep using a stem.
unless there's some details we don't know.
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Old 09-26-08, 08:32 AM   #4
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Quote:
Originally Posted by timcupery View Post
well biked is right. in responding here, I'll assume, as well biked has, that the stem's quill does go in far enough to be past the minimum-insertion line.
and as he says, there's not much point in going with the technomic (except that you already have it) if you don't want the handlebars high up there. you can easily and cheaply get a 1" quill stem with a shorter quill. It would be pretty weird to replace the fork just because you wanted to keep using a stem.
unless there's some details we don't know.
Well, yes, there is one tiny detail: The frameset was free; the stem cost $40.

Meanwhile, thanks to both of you for the advice.
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Old 09-26-08, 08:36 AM   #5
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Technomics bottom out in the steering tube of smaller frames unless you want your handlebars goofy-high. I've had the same problem. Only solution is to use a different stem or cut the Technomic down a bit so you can use it.
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Old 09-26-08, 01:57 PM   #6
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use a different chuck with the same threading and does it interfere with any badge rivets?
I have an allegro (puke green) and I cant remember..... what I had to drink yesterday.
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Old 09-26-08, 02:04 PM   #7
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Isn't the Technomic Deluxe about 50mm shorter than the std Technomic?
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Old 09-26-08, 02:25 PM   #8
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Yes.

To the OP: I bet you have a small frame, 53 cm or smaller. Now that you've seen a too-tall stem, don't buy a too-short stem. Work on your bike fitting so you can get a sense of how high your stem needs to go and what effective extension you need. Then you can evaluate any stem for whether or not it will help you.

A Technomic Deluxe will be maybe 5 cm shorter, but it could still be too high. Or you could go for one of the dozens of designs with similar height as a Cinelli 1A, and find it to be way too low. You need to find out what's right for you on that bike.

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Last edited by Road Fan; 09-26-08 at 02:29 PM.
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Old 09-26-08, 02:44 PM   #9
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The Deluxe model can definitely also be too high on a small frame. If your goal is to have handlebars level with saddle, then it will depend on how high your saddle is in relation to your top tube. Be careful of kludge solutions to address your problem with the Technomic bottoming out... if the stem ends up in the butted portion of the tube as you try to get it in as deep as possible, it won't be secure enough to be ridden that way. It might seem to work fine, but it can be unpredictable.

The Technomic is too tall a stem for someone who should fit a frame that is in the under 52-53 cm range -- unless you're someone who wants to ride a road bike with drop bars higher than the seat, for some strange, misinformed reason.
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Old 09-26-08, 05:31 PM   #10
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I naively tried a Technomic on my 52 cm Trek, following "advice." bike looked like a giraffe, rode terribly, and was hard to control.

It likes the height of a Tech Deluxe, but I like the 'bars just a few cm lower than the saddle, and 52 is just a bit small for me. I've been looking for a nice 54 cm with a large BB drop.
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