Ideal pressure between wheel and elastogel roller

[rshimizubr]

Hi,

I have just bought the Elite Novo Smart Trainer, and had a few runs.
I would like to know the correct pressure between the bike wheel on the elastogel roller, because I felt there were not power enough to keep me cycling standing up when selecting max power, which is simulating a very steep upward slope.
I just want to be a better notion in how to better calibrate and get the best results.

Thank you very much.
Roberto