So, we know how well they roll, well starting to get a decent handle on it anyways.
But.
What I have always wondered is how much energy is lost into the tyre say riding at 350 watts.
Or at 250 watts, or at 500 watts.
Are there more or less drive losses in a wider tyre?
How does pressure affect drive losses?
How much is lost into squirming on the road and how much into casing movement within itself and the tube?
How do drive losses vary with rider weight?
Is there a type of belt layout for tyres that yield lower drive losses at higher powers?

It feels to me that a 23mm tyre has more losses when riding up a steep hill at reasonably high power than a 25mm.
And not by just a little bit.

Is there a breakpoint where a stronger rider should be on a bigger tyre vs a smaller tyre in regards to drive losses?