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Old 2019-05-24, 01:35 PM   #9
OneTrackMind
Unicyclist
 
Join Date: Jun 2014
Location: Murwillumbah, NSW, Australia
Age: 60
Posts: 1,091
A trails tyre might be lightened by around thirty grams by inflating with Helium. That is not an insignificant difference in a high jump that only requires the tyre to stay inflated for a short time.

Should it be outlawed? Are people already doing it?

What about inflating with Nitrogen? It is slightly lighter than air due to the twenty percent content of the fifteen percent heavier oxygen molecules in air.

Nitrogen would reduce the weight of the air in the tyre by three percent. This is about a gram in a trials tyre.

BTW Planes have their tyres inflated with nitrogen but it isn't about the weight.
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