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25.4mm handlebars in 25.8mm stem, beer can shim doesn't work?

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25.4mm handlebars in 25.8mm stem, beer can shim doesn't work?

Old 06-12-05, 02:08 AM
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Erik
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25.4mm handlebars in 25.8mm stem, beer can shim doesn't work?

For my newly built fixie I chopped and flipped some older 25.4mm dropbars. I cut a shim out of a soda can to make them fit my 25.8mm stem. On the test ride the bars started turning forward, almost causing me to crash face first. I shopped around, but a proper shim doesn't seem to be available around here. Are there any other methods of making this work? Or am I looking at a different stem?
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Old 06-12-05, 02:49 AM
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You just need a thicker shim.

I calculate 0.4mm to be 0.0157". A Mt. Dew can I picked up was 0.005" and a Heineken can was 0.009". Maybe try a bunch of different beverage containers. You only need about an 0.008" since you will wrap it all the way around.

Sometimes hardware stores will carry brass shim material of various gauges in the hobby section as well.

Cheers

Last edited by Eros; 06-12-05 at 02:50 AM. Reason: addition
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Old 06-12-05, 02:53 AM
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Ha, I just realized you are in the Netherlands so all my conversions were a complete waste. Damn, I wish we had gotten on board with the rest of the world. Base 10 is where it's at.
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Old 06-12-05, 07:17 AM
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I would look at different cans. If you have access to calipers at all that may be helpful.
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Old 06-12-05, 09:21 AM
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Ok, so maybe we should compile a list of wall thickness for different beverages? You know, for future reference?
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Old 06-12-05, 09:54 AM
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Originally Posted by Erik
Ok, so maybe we should compile a list of wall thickness for different beverages? You know, for future reference?
Thats a good idea
I got some calipers a few weeks ago, i need some use for them anyways
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Old 06-12-05, 11:29 AM
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I've never owned a dial caliper. That's one thing missing out of my tool collection. This is a great excuse to get one...
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Old 06-12-05, 11:53 AM
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Originally Posted by The Fixer
I've never owned a dial caliper. That's one thing missing out of my tool collection. This is a great excuse to get one...
You can get a digital for 16 bucks from Harbor Freight, 10 for a dial i think
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Old 06-14-05, 10:59 PM
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Nitto makes a shim that will take your 25.4 bars to 26.0...
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Old 06-15-05, 09:44 AM
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Well, other can shims aren't working either, even after tightening the stem bolts a bit too much I can still rotate the bars with a bit of force. Nitto is not available here, so I guess I need new bars.
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Old 06-15-05, 09:49 AM
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Originally Posted by Erik
Well, other can shims aren't working either, even after tightening the stem bolts a bit too much I can still rotate the bars with a bit of force. Nitto is not available here, so I guess I need new bars.
Get some proper shim material. you can order the nitto shim thru www.rivbike.com
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Old 06-15-05, 10:25 AM
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A salmon or tuna can is almost the perfect thickness. I measured the one I used to make my bar shim at 0.3 mm. Wrap it all the way around a 25.4 mm bar, and presto: 26.0.
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Old 06-15-05, 02:36 PM
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I would suggest roughing up the shim material and see if that helps. Some coarse emery cloth maybe?
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Old 06-15-05, 02:41 PM
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Originally Posted by sydney
Get some proper shim material. you can order the nitto shim thru www.rivbike.com
pay for shims?
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Old 06-15-05, 06:10 PM
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wrap aluminum foil around it until you get the thickness you want. Two or three layers oughta do it. Or cellophane tape, either one. Tighten the hell out of the bolt to squish it all together. Yank on the bars really hard to make sure it won't slip and call it good.

In practice the friction between layers will be so great when you tighten the bolt that nothing will move. Plus you'll be deforming the foil into the knurling on the stem and bars.

If you want it to be extra good and tight, use the foil and layer everything with loc-tite.

Last edited by vainamoinen; 06-15-05 at 06:17 PM.
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