Mousse?
 

If a mousse is a solid inner tube that cannot be punctured why don't people use them?:cool4:

For a number of reasons but mainly because the mousse stuff is softish and the equivalent of about 10psi. That's not to good for handling. It also means the tyre deforms a lot which puts heat into the mouse which over a period on the road then breaks up. Great short term - in a competition or something but not too good over a longer period.

I see
 

I see. Thanks.

and they're also illegal to use on the road here in the UK, dont know about other parts of the world.