Originally Posted by elcruxio

https://silca.cc/blogs/silca/part-4b...-and-impedance

BRR uses solid weight. However a human is a flabby collection of liquids held together by cell walls which experiences vibrations in a very different manner than a piece of steel would.

Ie. too much vibration heats up tissues which directly off rolling.

Roller drum tests work well for ranking tires against each other but they're fairly useless when trying to find the optimal tire pressure.

And that's before we even begin broaching the subject of vibration fatigue. If you need to be in a shaky environment for extended periods, you're going to get tired.