is this stupid way to save weight?

Discuss light weight issues concerning road bikes & parts.
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Joined: Thu Mar 09, 2017 5:35 am

by Lewn777

There have been many threads on this but to summarise:
1. There is variation between manufacturers, some are happy with short light expanders, are others are not. RTFM and use what is recommended by the manufacturer. If the manufacturer supply a plug that's like a boat anchor leave it, or find a lighter one that fits the same dimensions (at your own risk).
2. The stem bolts always need to be supported from inside the steerer, use an expander plug that fits this purpose.
3. There shouldn't be any reason for a steerer to fail because of a minimal amount of spacers below them stem. Having spacers above the stem is a bad idea, as the expander plug might not reach the stem bolts, then you are much more prone to failure.
4. Some people have used minimal lightweight plugs for years or even removed the plug entirely to save weight and never had an issue. Others have followed manufacturer guidelines yet have had steerer failure.
5. Alloy steerers with carbon fiber legs are no guarantee of immunity from danger. They are simply a materials cost saving measure and can fail at the junction at the crown where the alloy and carbon are bonded.

Posts: 674
Joined: Wed Mar 15, 2017 5:30 pm

by morganb

Marin wrote:
Fri Oct 26, 2018 8:28 pm
morganb wrote:
Fri Oct 26, 2018 7:24 pm
snapped at the steerer this year, during U23 nationals in the middle of a pack no less.
Just like that from normal riding? Had to be damaged previously.
He said he stood up as they were rolling into a short climb and it broke. Slammed stem.

Trek warrantied it.

by Weenie

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