"Airless" tires

[rick81721]

https://newatlas.com/bicycles/metl-shape-memory-airless-bicycle-tire/

 

[JPark]

I wonder how the tire performs in rolling resistance?

 

[pygmypony]

i was just checking these out. looks like an awesome solution for a commuter bike

 

[tonyride]

Looks heavy.

 

[Ian F]

Looks heavy.

450g for a 35c, so not unduly heavy.

I'm curious what is supposed to hold the tire onto the rim. The text says, "spring pressure" but that doesn't sound adequate. From a functional standpoint, this is similar to a sew-up tire, but those are glued onto special rims to keep them in place. I can't see how spring pressure alone would keep the tire seated onto the rim under hard cornering or braking without it being incredibly difficult to install.