Originally Posted by
elcruxio
[...]
You might want to rethink that idea. As mentioned before, drum tests only paint you half the picture. On a drum the rolling resistance will continue to reduce as pressure increases. In the real world though once the tire has a bike and rider there is a break point. When you reach high enough of a pressure the rolling resistance will begin increasing rapidly. As in it's better to be severely under pressured rather than even a little bit over pressured.
https://silca.cc/blogs/silca/part-4b...-and-impedance
Interesting data. Not clear how it translates to 50mm@50psi, though. The break points in their data occurs at much higher pressures, where the tire cannot absorb bumps in the road.
I may try to experiment this fall. Long path which is a mix of excellent tarmac and gravel. If I can get my power meter to work again, I'll report.