Originally Posted by Racing Dan

Simple. You are not "allowed" to not follow current orthodoxy, that is, "soft tyres are faster". Above I posted a link to some actual data, clearly showing the faster pressure on normal roads are much higher than current consensus suggest. As mentioned above 90 psi and into the 100+ psi territory depending on road surface conditions. Only in case the road is very rough, lower pressure is faster. Me, I'm routinely riding in the 50-60psi range, for comfort, and I'm slow at any pressure anyway :-)