Thanks to Tim Hillsamer for the link. Lots more here at TECHVEHI but it’s all in French.
I found a bit more info on it in english at the “car body design” site. Apparently the first one is set up to be a land speed bike. Cool!
“The Saline Airstream Concept is a speed record motorbike concept powered by a compressed air engine. It was created by five design students at the ISD of Valenciennes (France).”
It looks like fiberglass wrap tanks, although they could be CF, graphite or kevlar blends too.
This is a good application, but I bet electric is more suitable.