L3130 tire pressure ?

[NIXON]

The owners manual says 20psi for R4's . But that seems a bit low . I checked mine as delivered and they were around 24 psi . I'm wondering whether to go up or down with the pressure . ( see Henro's Bouncy, Bouncy thread )
Lame question for sure . But I had to ask anyway /forums/images/graemlins/smile.gif John