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Custom Stem

Old 06-19-24, 03:23 PM
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Custom Stem

I need a custom handlebar stem for our tandem.

Does anyone know of a good builder with a reasonable lead time?
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Old 06-19-24, 04:55 PM
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What needs to be custom about it?
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Old 06-19-24, 05:12 PM
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Length and angle.
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Old 06-20-24, 08:40 AM
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People don't like making stems for some reason. Although Paul Brodie's video where he measures one he made may hold some clues. Never sell anything to a metrologist.

I have made exactly two tandem stems. The first one was made using a cut up frame for the part that attaches to the captain's seat post. I don't recall what I used to clamp the handlebar.
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Old 06-20-24, 09:00 AM
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How much length and what angle of rise? Standard 28.6 steerer and 31.8 bar?
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Old 06-20-24, 09:11 AM
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Originally Posted by wayold
How much length and what angle of rise? Standard 28.6 steerer and 31.8 bar?
No, it's for a Santanna, so the steerer meeds to be 1.25" (31.8), about 130mm long with a 18º angle (roughly). Standard bar clamp. I can provide exact measurements.
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Old 06-20-24, 12:01 PM
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You need a wedge style stem? You may end up having to go back to Santana.
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Old 06-20-24, 03:02 PM
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It is threadless. I’ve exhausted all of Santana’s options.
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Old 06-20-24, 03:13 PM
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A quick search around the web yields some 1-1/4 x 120-130mm stems, but 6 deg not 18. Can you use something like this and get your desired hand location using a riser bar of some sort?
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Old 06-20-24, 03:25 PM
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Originally Posted by wayold
A quick search around the web yields some 1-1/4 x 120-130mm stems, but 6 deg not 18. Can you use something like this and get your desired hand location using a riser bar of some sort?
I've never found such stems and I've looked extensively. Do you have a link?

A 130mm might work.

I'm not aware of a riser stem for a 1-1/4 steerer tube, and given the 400#(+) weight of the bike, I'm pretty sure I wouldn't want to use one.
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Old 06-20-24, 05:22 PM
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The Zipp Service Course SL stem shows as available with a 1.25" steerer in various lengths including 130mm on the SRAM/Zipp web site. So far I've only found up 120mm for sale at typical online bike stores but I've only looked briefly.
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Old 06-20-24, 05:25 PM
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Originally Posted by wayold
The Zipp Service Course SL stem shows as available with a 1.25" steerer in various lengths including 130mm on the SRAM/Zipp web site. So far I've only found up 120mm for sale at typical online bike stores but I've only looked briefly.
Thanks!

I'm surprised I didn't find those, as I've done quite a bit of searching (the SRAM website has come up in other searches). What search query did you use?
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Old 06-20-24, 05:31 PM
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Nothing fancy. I just Googled 1-1/4" stem 130mm and saw some mentions of the Zipp Service Course stem. Then I Googled Zipp Service Course to get to the product page I linked to.
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Old 06-20-24, 05:42 PM
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I'm sure Dave Levy, TiCycles, could do it. Don't know lead times or cost. Probably not cheap but he could certainly build you exactly what you want.
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Old 06-21-24, 08:18 AM
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Originally Posted by 79pmooney
I'm sure Dave Levy, TiCycles, could do it. Don't know lead times or cost. Probably not cheap but he could certainly build you exactly what you want.
He's building me a fork for the tandem and the due date is December/January. I'd love to have him do it, but I need it sooner.

Does anyone have any experience with Duane Draper @ Draper Cycles in Seattle?
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Old 06-21-24, 06:25 PM
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Duane is a long time contributor here on BF. I can't remember any posts from him that made me shake my head I think he'll do you well. Andy
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Old 06-21-24, 07:28 PM
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Originally Posted by Andrew R Stewart
Duane is a long time contributor here on BF. I can't remember any posts from him that made me shake my head I think he'll do you well. Andy
Great - thank you!
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Old 06-22-24, 04:37 PM
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I follow Duane on Flickr, where I've seen in-process shots that show him to be careful and skilled. I've also been to his house and seen his work IRL. I would trust him to make a stem without any scary shortcuts taken.

He's not a full-time pro, he's got a day job, but sometimes a talented hobbyist can beat a full-time pro, by virtue of not needing to make everything profitable.
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Old 06-23-24, 09:27 AM
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Originally Posted by bulgie
I follow Duane on Flickr, where I've seen in-process shots that show him to be careful and skilled. I've also been to his house and seen his work IRL. I would trust him to make a stem without any scary shortcuts taken.

He's not a full-time pro, he's got a day job, but sometimes a talented hobbyist can beat a full-time pro, by virtue of not needing to make everything profitable.
Thanks! So far, working with him has been great!
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