There are a lot of opinions about what tyre pressures you should use when racing. Finally someone has done proper testing and the results are in.
The ideal tyre pressure depends on rider weight and surface conditions. But what the research also shows is that wider lower pressures are actually faster. The main difference from the traditional 120 psi is that it feels faster but it's not...
You can read and hear more about it in this article.
You can also download the research report here.