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Raliegh Technium - Dropout size? ...coldsetting an AL/CroMo frame = death?

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Raliegh Technium - Dropout size? ...coldsetting an AL/CroMo frame = death?

Old 03-23-10, 07:30 AM
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Raliegh Technium - Dropout size? ...coldsetting an AL/CroMo frame = death?

Hey everybody,

I'm considering buying this Raleigh Technium, but I have some misgivings. Unfortunately I don't have a model number and the bike is in another state.




1. The CL post claims the bike is made from aluminum. However, my sources tell me the chainstays and seatstays are most likely made of steel. Was this true for all years of the Technium?

2. I'm wondering if this technium has 126mm drop-out spacing, or 130mm. I have a better wheelset here, sitting is disuse. However, the rear hub on this wheelset is 130mm.

3. If the Technium has a 126mm rear drop-out, but the seatstays and chainstays are made of steel, would it be dangerous to cold-set the bike with the 130mm rear wheel?
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Old 03-23-10, 08:17 AM
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If the rear triangle is steel, you can coldset.
No matter what the material, you can just spread the dropouts a little bit to use a 130mm wheel in a 126 frame. I do that on my older Cannondale & steel bikes.
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Old 03-23-10, 08:31 AM
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Originally Posted by Homebrew01
If the rear triangle is steel, you can coldset.
No matter what the material, you can just spread the dropouts a little bit to use a 130mm wheel in a 126 frame. I do that on my older Cannondale & steel bikes.
Hmm okay. So you've done this on mixed-material frames?

I guess most of the "stress" of the 4mm stretch would been taken by the steel tubing towards the rear drop-out, not at the joints where the steel meets the aluminum... Otherwise, the concern would apply to all-steel bikes as well.

Can anybody confirm that the stays are steel on this bike? Or at least give me a guess on the model year... I'm a bit of a noob
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Old 03-23-10, 08:45 AM
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Originally Posted by Pukeskywalker
Hmm okay. So you've done this on mixed-material frames?

I guess most of the "stress" of the 4mm stretch would been taken by the steel tubing towards the rear drop-out, not at the joints where the steel meets the aluminum... Otherwise, the concern would apply to all-steel bikes as well.

Can anybody confirm that the stays are steel on this bike? Or at least give me a guess on the model year... I'm a bit of a noob
Maybe a case by case scenario for specific frames would be better than my original blanket statement. But a steel rear triangle should have a steel brake bridge, and probably a chainstay bridge. When you spread the dropouts, most of the stress will stop at those bridges.
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Old 03-23-10, 07:21 PM
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If thats steel u can put the 130 mms wheel w/o any problem. It will spread 2 mms each side. That wont kill the frame at all.
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Old 03-23-10, 07:49 PM
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Techniums were early "hybrid" frames; aluminum and steel. If memory serves the stays are steel and the posters are correct in that it can be cold set but you can probably spread the stays without actually cold-setting the frame.

Tall frame.
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Old 03-23-10, 08:49 PM
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Do you know the year of the frame? The Technium I bought around 1992 or so had steel tubes bonded to aluminum lugs.
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