Originally Posted by
CliftonGK1
It sounds like you've had the similar experience that I've read about from everyone using airless tires (any brand.) Once they're on (which can be quite a chore) it feels sluggish and slippy.
I'm not sure why airless manufacturers can't use their compound for the airless inside section of the tire and bond or heat weld an over-casing of a better gripping compound for the outer tread of their tires.
They could but it wouldn't help. You seem to think that rolling resistance is frictional; it isn't. It's the energy needed to bend the casing (and probably the filler with the airless tyre). And extra layer would increase this.
This is also why the folk belief that narrow tyres have to be faster is wrong.